1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
|
# -*- coding: utf-8 -*-
#-----------------------------------------------------------
#
# fTools
# Copyright (C) 2008-2011 Carson Farmer
# EMAIL: carson.farmer (at) gmail.com
# WEB : http://www.ftools.ca/fTools.html
#
# A collection of data management and analysis tools for vector data
#
#-----------------------------------------------------------
#
# licensed under the terms of GNU GPL 2
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#---------------------------------------------------------------------
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
from ui_frmGeometry import Ui_Dialog
import ftools_utils
import math
from itertools import izip
import voronoi
from sets import Set
class GeometryDialog( QDialog, Ui_Dialog ):
def __init__( self, iface, function ):
QDialog.__init__( self, iface.mainWindow() )
self.iface = iface
self.setupUi( self )
self.myFunction = function
self.buttonOk = self.buttonBox_2.button( QDialogButtonBox.Ok )
QObject.connect( self.toolOut, SIGNAL( "clicked()" ), self.outFile )
if self.myFunction == 1:
QObject.connect( self.inShape, SIGNAL( "currentIndexChanged( QString )" ), self.update )
elif self.myFunction == 5:
QObject.connect( self.chkWriteShapefile, SIGNAL( "stateChanged( int )" ), self.updateGui )
self.updateGui()
self.manageGui()
self.success = False
self.cancel_close = self.buttonBox_2.button( QDialogButtonBox.Close )
self.progressBar.setValue( 0 )
def update( self ):
self.cmbField.clear()
inputLayer = unicode( self.inShape.currentText() )
if inputLayer != "":
changedLayer = ftools_utils.getVectorLayerByName( inputLayer )
changedField = ftools_utils.getFieldList( changedLayer )
for f in changedField:
self.cmbField.addItem( unicode( f.name() ) )
self.cmbField.addItem( "--- " + self.tr( "Merge all" ) + " ---" )
def accept( self ):
if self.inShape.currentText() == "":
QMessageBox.information( self, self.tr( "Geometry" ),
self.tr( "Please specify input vector layer" ) )
elif self.outShape.text() == "" and self.myFunction != 5:
QMessageBox.information( self, self.tr( "Geometry" ),
self.tr( "Please specify output shapefile" ) )
elif self.lineEdit.isVisible() and self.lineEdit.value() < 0.00:
QMessageBox.information( self, self.tr( "Geometry" ),
self.tr( "Please specify valid tolerance value" ) )
elif self.cmbField.isVisible() and self.cmbField.currentText() == "":
QMessageBox.information( self, self.tr( "Geometry" ),
self.tr( "Please specify valid UID field" ) )
else:
self.outShape.clear()
self.geometry( self.inShape.currentText(), self.lineEdit.value(),
self.cmbField.currentText() )
def outFile( self ):
self.outShape.clear()
(self.shapefileName, self.encoding) = ftools_utils.saveDialog( self )
if self.shapefileName is None or self.encoding is None:
return
self.outShape.setText( self.shapefileName )
def manageGui( self ):
self.lblField.setVisible( False )
self.cmbField.setVisible( False )
self.lblCalcType.setVisible( False )
self.cmbCalcType.setVisible( False )
self.chkUseSelection.setVisible( False )
self.chkByFeatures.setVisible( False )
self.chkWriteShapefile.setVisible( False )
if self.myFunction == 1: # Singleparts to multipart
self.setWindowTitle( self.tr( "Singleparts to multipart" ) )
self.lineEdit.setVisible( False )
self.label.setVisible( False )
self.lblOutputShapefile.setText( self.tr( "Output shapefile" ) )
self.cmbField.setVisible( True )
self.lblField.setVisible( True )
elif self.myFunction == 2: # Multipart to singleparts
self.setWindowTitle( self.tr( "Multipart to singleparts" ) )
self.lineEdit.setVisible( False )
self.label.setVisible( False )
self.lblOutputShapefile.setText( self.tr( "Output shapefile" ) )
elif self.myFunction == 3: # Extract nodes
self.setWindowTitle( self.tr( "Extract nodes" ) )
self.lineEdit.setVisible( False )
self.label.setVisible( False )
elif self.myFunction == 4: # Polygons to lines
self.setWindowTitle( self.tr( "Polygons to lines" ) )
self.lblOutputShapefile.setText( self.tr( "Output shapefile" ) )
self.label_3.setText( self.tr( "Input polygon vector layer" ) )
self.label.setVisible( False )
self.lineEdit.setVisible( False )
elif self.myFunction == 5: # Export/Add geometry columns
self.setWindowTitle( self.tr( "Export/Add geometry columns" ) )
self.lblOutputShapefile.setText( self.tr( "Output shapefile" ) )
self.label_3.setText( self.tr( "Input vector layer" ) )
self.label.setVisible( False )
self.lineEdit.setVisible( False )
# populate calculation types
self.lblCalcType.setVisible( True )
self.cmbCalcType.setVisible( True )
self.cmbCalcType.addItem( self.tr( "Layer CRS" ) )
self.cmbCalcType.addItem( self.tr( "Project CRS" ) )
self.cmbCalcType.addItem( self.tr( "Ellipsoid" ) )
self.chkWriteShapefile.setVisible( True )
self.chkWriteShapefile.setChecked( False )
self.lblOutputShapefile.setVisible( False )
elif self.myFunction == 7: # Polygon centroids
self.setWindowTitle( self.tr( "Polygon centroids" ) )
self.lblOutputShapefile.setText( self.tr( "Output point shapefile" ) )
self.label_3.setText( self.tr( "Input polygon vector layer" ) )
self.label.setVisible( False )
self.lineEdit.setVisible( False )
else:
if self.myFunction == 8: # Delaunay triangulation
self.setWindowTitle( self.tr( "Delaunay triangulation" ) )
self.label_3.setText( self.tr( "Input point vector layer" ) )
self.label.setVisible( False )
self.lineEdit.setVisible( False )
elif self.myFunction == 10: # Voronoi Polygons
self.setWindowTitle( self.tr( "Voronoi polygon" ) )
self.label_3.setText( self.tr( "Input point vector layer" ) )
self.label.setText( self.tr( "Buffer region" ) )
self.lineEdit.setSuffix( " %" )
self.lineEdit.setRange( 0, 100 )
self.lineEdit.setSingleStep( 5 )
self.lineEdit.setValue( 0 )
elif self.myFunction == 11: #Lines to polygons
self.setWindowTitle( self.tr( "Lines to polygons" ) )
self.lblOutputShapefile.setText( self.tr( "Output shapefile" ) )
self.label_3.setText( self.tr( "Input line vector layer" ) )
self.label.setVisible( False )
self.lineEdit.setVisible( False )
else: # Polygon from layer extent
self.setWindowTitle( self.tr( "Polygon from layer extent" ) )
self.label_3.setText( self.tr( "Input layer" ) )
self.label.setVisible( False )
self.lineEdit.setVisible( False )
self.chkByFeatures.setVisible( True )
self.chkUseSelection.setVisible( True )
self.lblOutputShapefile.setText( self.tr( "Output polygon shapefile" ) )
self.resize( 381, 100 )
self.populateLayers()
def updateGui( self ):
if self.chkWriteShapefile.isChecked():
self.lineEdit.setEnabled( True )
self.toolOut.setEnabled( True )
self.addToCanvasCheck.setEnabled( True )
else:
self.lineEdit.setEnabled( False )
self.toolOut.setEnabled( False )
self.addToCanvasCheck.setEnabled( False )
def populateLayers( self ):
self.inShape.clear()
if self.myFunction == 3 or self.myFunction == 6:
myList = ftools_utils.getLayerNames( [ QGis.Polygon, QGis.Line ] )
elif self.myFunction == 4 or self.myFunction == 7:
myList = ftools_utils.getLayerNames( [ QGis.Polygon ] )
elif self.myFunction == 8 or self.myFunction == 10:
myList = ftools_utils.getLayerNames( [ QGis.Point ] )
elif self.myFunction == 9:
myList = ftools_utils.getLayerNames( "all" )
elif self.myFunction == 11:
myList = ftools_utils.getLayerNames( [ QGis.Line ] )
else:
myList = ftools_utils.getLayerNames( [ QGis.Point, QGis.Line, QGis.Polygon ] )
self.inShape.addItems( myList )
#1: Singleparts to multipart
#2: Multipart to singleparts
#3: Extract nodes
#4: Polygons to lines
#5: Export/Add geometry columns
#6: Simplify geometries (disabled)
#7: Polygon centroids
#8: Delaunay triangulation
#9: Polygon from layer extent
#10: Voronoi polygons
#11: Lines to polygons
def geometry( self, myLayer, myParam, myField ):
if self.myFunction == 9:
vlayer = ftools_utils.getMapLayerByName( myLayer )
else:
vlayer = ftools_utils.getVectorLayerByName( myLayer )
error = False
if ( self.myFunction == 5 and self.chkWriteShapefile.isChecked() ) or self.myFunction != 5:
check = QFile( self.shapefileName )
if check.exists():
if not QgsVectorFileWriter.deleteShapeFile( self.shapefileName ):
QMessageBox.warning( self, self.tr( "Geometry"),
self.tr( "Unable to delete existing shapefile." ) )
return
if self.myFunction == 5 and not self.chkWriteShapefile.isChecked():
self.shapefileName = None
self.encoding = None
res = QMessageBox.warning( self, self.tr( "Geometry"),
self.tr( "Currently QGIS doesn't allow simultaneous access from "
"different threads to the same datasource. Make sure your layer's "
"attribute tables are closed. Continue?"),
QMessageBox.Yes | QMessageBox.No )
if res == QMessageBox.No:
return
self.buttonOk.setEnabled( False )
self.testThread = geometryThread( self.iface.mainWindow(), self, self.myFunction,
vlayer, myParam, myField, self.shapefileName, self.encoding,
self.cmbCalcType.currentIndex(), self.chkWriteShapefile.isChecked(),
self.chkByFeatures.isChecked(), self.chkUseSelection.isChecked() )
QObject.connect( self.testThread, SIGNAL( "runFinished( PyQt_PyObject )" ), self.runFinishedFromThread )
QObject.connect( self.testThread, SIGNAL( "runStatus( PyQt_PyObject )" ), self.runStatusFromThread )
QObject.connect( self.testThread, SIGNAL( "runRange( PyQt_PyObject )" ), self.runRangeFromThread )
self.cancel_close.setText( self.tr( "Cancel" ) )
QObject.connect( self.cancel_close, SIGNAL( "clicked()" ), self.cancelThread )
self.testThread.start()
def cancelThread( self ):
self.testThread.stop()
self.buttonOk.setEnabled( True )
def runFinishedFromThread( self, success ):
self.testThread.stop()
self.buttonOk.setEnabled( True )
extra = ""
if success == "math_error":
QMessageBox.warning( self, self.tr( "Geometry" ),
self.tr( "Error processing specified tolerance!\nPlease choose larger tolerance..." ) )
if not QgsVectorFileWriter.deleteShapeFile( self.shapefileName ):
QMessageBox.warning( self, self.tr( "Geometry" ),
self.tr( "Unable to delete incomplete shapefile." ) )
elif success == "attr_error":
QMessageBox.warning( self, self.tr( "Geometry" ),
self.tr( "At least two features must have same attribute value!\nPlease choose another field..." ) )
if not QgsVectorFileWriter.deleteShapeFile( self.shapefileName ):
QMessageBox.warning( self, self.tr( "Geometry" ),
self.tr( "Unable to delete incomplete shapefile." ) )
else:
if success == "valid_error":
extra = self.tr( "One or more features in the output layer may have invalid "
+ "geometry, please check using the check validity tool\n" )
success = True
self.cancel_close.setText( "Close" )
QObject.disconnect( self.cancel_close, SIGNAL( "clicked()" ), self.cancelThread )
if success:
if ( self.myFunction == 5 and self.chkWriteShapefile.isChecked() ) or self.myFunction != 5:
if self.addToCanvasCheck.isChecked():
addCanvasCheck = ftools_utils.addShapeToCanvas(unicode(self.shapefileName))
if not addCanvasCheck:
QMessageBox.warning( self, self.tr("Geometry"), self.tr( "Error loading output shapefile:\n%s" ) % ( unicode( self.shapefileName ) ))
self.populateLayers()
else:
QMessageBox.information(self, self.tr("Geometry"),self.tr("Created output shapefile:\n%s\n%s" ) % ( unicode( self.shapefileName ), extra ))
else:
QMessageBox.information( self, self.tr( "Geometry" ),
self.tr( "Layer '{0}' updated" ).format( self.inShape.currentText() ) )
else:
QMessageBox.warning( self, self.tr( "Geometry" ), self.tr( "Error writing output shapefile." ) )
def runStatusFromThread( self, status ):
self.progressBar.setValue( status )
def runRangeFromThread( self, range_vals ):
self.progressBar.setRange( range_vals[ 0 ], range_vals[ 1 ] )
class geometryThread( QThread ):
def __init__( self, parentThread, parentObject, function, vlayer, myParam,
myField, myName, myEncoding, myCalcType, myNewShape, myByFeatures,
myUseSelection ):
QThread.__init__( self, parentThread )
self.parent = parentObject
self.running = False
self.myFunction = function
self.vlayer = vlayer
self.myParam = myParam
self.myField = myField
self.myName = myName
self.myEncoding = myEncoding
self.myCalcType = myCalcType
self.writeShape = myNewShape
self.byFeatures = myByFeatures
self.useSelection = myUseSelection
def run( self ):
self.running = True
if self.myFunction == 1: # Singleparts to multipart
success = self.single_to_multi()
elif self.myFunction == 2: # Multipart to singleparts
success = self.multi_to_single()
elif self.myFunction == 3: # Extract nodes
success = self.extract_nodes()
elif self.myFunction == 4: # Polygons to lines
success = self.polygons_to_lines()
elif self.myFunction == 5: # Export/Add geometry columns
success = self.export_geometry_info()
# note that 6 used to be associated with simplify_geometry
elif self.myFunction == 7: # Polygon centroids
success = self.polygon_centroids()
elif self.myFunction == 8: # Delaunay triangulation
success = self.delaunay_triangulation()
elif self.myFunction == 9: # Polygon from layer extent
if self.byFeatures:
success = self.feature_extent()
else:
success = self.layer_extent()
elif self.myFunction == 10: # Voronoi Polygons
success = self.voronoi_polygons()
elif self.myFunction == 11: # Lines to polygons
success = self.lines_to_polygons()
self.emit( SIGNAL( "runFinished( PyQt_PyObject )" ), success )
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
def stop( self ):
self.running = False
def single_to_multi( self ):
vprovider = self.vlayer.dataProvider()
allValid = True
geomType = self.singleToMultiGeom( vprovider.geometryType() )
writer = QgsVectorFileWriter( self.myName, self.myEncoding, vprovider.fields(),
geomType, vprovider.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
outGeom = QgsGeometry()
index = vprovider.fieldNameIndex( self.myField )
if not index == -1:
unique = ftools_utils.getUniqueValues( vprovider, int( index ) )
else:
unique = [ "" ]
nFeat = vprovider.featureCount() * len( unique )
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
merge_all = self.myField == "--- " + self.tr( "Merge all" ) + " ---"
if not len( unique ) == self.vlayer.featureCount() or merge_all:
for i in unique:
# Strip spaces for strings, so " A " and "A" will be grouped
# TODO: Make this optional (opt-out to keep it easy for beginners)
if isinstance( i, basestring ):
iMod = i.strip()
else:
iMod = i
multi_feature= []
first = True
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
atMap = inFeat.attributes()
if not merge_all:
idVar = atMap[ index ]
if isinstance( idVar, basestring ):
idVarMod = idVar.strip()
else:
idVarMod = idVar
else:
idVarMod = ""
if idVarMod == iMod or merge_all:
if first:
atts = atMap
first = False
inGeom = QgsGeometry( inFeat.geometry() )
vType = inGeom.type()
feature_list = self.extractAsMulti( inGeom )
multi_feature.extend( feature_list )
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
if not first:
outFeat.setAttributes( atts )
outGeom = QgsGeometry( self.convertGeometry( multi_feature, vType ) )
if not outGeom.isGeosValid():
allValid = "valid_error"
outFeat.setGeometry( outGeom )
writer.addFeature( outFeat )
del writer
else:
return "attr_error"
return allValid
def multi_to_single( self ):
vprovider = self.vlayer.dataProvider()
geomType = self.multiToSingleGeom( vprovider.geometryType() )
writer = QgsVectorFileWriter( self.myName, self.myEncoding, vprovider.fields(),
geomType, vprovider.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
outGeom = QgsGeometry()
nFeat = vprovider.featureCount()
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
inGeom = inFeat.geometry()
atMap = inFeat.attributes()
featList = self.extractAsSingle( inGeom )
outFeat.setAttributes( atMap )
for i in featList:
outFeat.setGeometry( i )
writer.addFeature( outFeat )
del writer
return True
def extract_nodes( self ):
vprovider = self.vlayer.dataProvider()
writer = QgsVectorFileWriter( self.myName, self.myEncoding, vprovider.fields(),
QGis.WKBPoint, vprovider.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
outGeom = QgsGeometry()
nFeat = vprovider.featureCount()
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
inGeom = inFeat.geometry()
atMap = inFeat.attributes()
pointList = ftools_utils.extractPoints( inGeom )
outFeat.setAttributes( atMap )
for i in pointList:
outFeat.setGeometry( outGeom.fromPoint( i ) )
writer.addFeature( outFeat )
del writer
return True
def polygons_to_lines( self ):
vprovider = self.vlayer.dataProvider()
writer = QgsVectorFileWriter( self.myName, self.myEncoding, vprovider.fields(),
QGis.WKBLineString, vprovider.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
outGeom = QgsGeometry()
nFeat = vprovider.featureCount()
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0)
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
multi = False
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
inGeom = inFeat.geometry()
if inGeom.isMultipart():
multi = True
atMap = inFeat.attributes()
lineList = self.extractAsLine( inGeom )
outFeat.setAttributes( atMap )
for h in lineList:
outFeat.setGeometry( outGeom.fromPolyline( h ) )
writer.addFeature( outFeat )
del writer
return True
def lines_to_polygons( self ):
vprovider = self.vlayer.dataProvider()
writer = QgsVectorFileWriter( self.myName, self.myEncoding, vprovider.fields(),
QGis.WKBPolygon, vprovider.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
nFeat = vprovider.featureCount()
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0)
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
outGeomList = []
multi = False
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
if inFeat.geometry().isMultipart():
outGeomList = inFeat.geometry().asMultiPolyline()
multi = True
else:
outGeomList.append( inFeat.geometry().asPolyline() )
polyGeom = self.remove_bad_lines( outGeomList )
if len( polyGeom ) <> 0:
outFeat.setGeometry( QgsGeometry.fromPolygon( polyGeom ) )
atMap = inFeat.attributes()
outFeat.setAttributes( atMap )
writer.addFeature( outFeat )
del writer
return True
def export_geometry_info( self ):
ellips = None
crs = None
coordTransform = None
# calculate with:
# 0 - layer CRS
# 1 - project CRS
# 2 - ellipsoidal
if self.myCalcType == 2:
settings = QSettings()
ellips = settings.value( "/qgis/measure/ellipsoid", "WGS84" )
crs = self.vlayer.crs().srsid()
elif self.myCalcType == 1:
mapCRS = self.parent.iface.mapCanvas().mapRenderer().destinationCrs()
layCRS = self.vlayer.crs()
coordTransform = QgsCoordinateTransform( layCRS, mapCRS )
inFeat = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
nElement = 0
vprovider = self.vlayer.dataProvider()
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0)
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, vprovider.featureCount() ) )
( fields, index1, index2 ) = self.checkMeasurementFields( self.vlayer, not self.writeShape )
if self.writeShape:
writer = QgsVectorFileWriter( self.myName, self.myEncoding, fields,
vprovider.geometryType(), vprovider.crs() )
fit = vprovider.getFeatures()
while fit.nextFeature(inFeat):
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
nElement += 1
inGeom = inFeat.geometry()
if self.myCalcType == 1:
inGeom.transform( coordTransform )
( attr1, attr2 ) = self.simpleMeasure( inGeom, self.myCalcType, ellips, crs )
if self.writeShape:
outFeat.setGeometry( inGeom )
atMap = inFeat.attributes()
maxIndex = index1 if index1 > index2 else index2
if maxIndex >= len(atMap):
atMap += [ "" ] * ( index2+1 - len(atMap) )
atMap[ index1 ] = attr1
if index1 != index2:
atMap[ index2 ] = attr2
outFeat.setAttributes( atMap )
writer.addFeature( outFeat )
else:
changeMap = {}
changeMap[ inFeat.id() ] = {}
changeMap[ inFeat.id() ][ index1 ] = attr1
if index1!=index2:
changeMap[ inFeat.id() ][ index2 ] = attr2
vprovider.changeAttributeValues( changeMap )
self.vlayer.updateFields()
if self.writeShape:
del writer
return True
def polygon_centroids( self ):
vprovider = self.vlayer.dataProvider()
writer = QgsVectorFileWriter( self.myName, self.myEncoding, vprovider.fields(),
QGis.WKBPoint, vprovider.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
nFeat = vprovider.featureCount()
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
inGeom = inFeat.geometry()
atMap = inFeat.attributes()
outGeom = inGeom.centroid()
if outGeom is None:
return "math_error"
outFeat.setAttributes( atMap )
outFeat.setGeometry( QgsGeometry( outGeom ) )
writer.addFeature( outFeat )
del writer
return True
def delaunay_triangulation( self ):
import voronoi
from sets import Set
vprovider = self.vlayer.dataProvider()
fields = QgsFields()
fields.append( QgsField( "POINTA", QVariant.Double ) )
fields.append( QgsField( "POINTB", QVariant.Double ) )
fields.append( QgsField( "POINTC", QVariant.Double ) )
writer = QgsVectorFileWriter( self.myName, self.myEncoding, fields,
QGis.WKBPolygon, vprovider.crs() )
inFeat = QgsFeature()
c = voronoi.Context()
pts = []
ptDict = {}
ptNdx = -1
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
geom = QgsGeometry( inFeat.geometry() )
point = geom.asPoint()
x = point.x()
y = point.y()
pts.append( ( x, y ) )
ptNdx +=1
ptDict[ptNdx] = inFeat.id()
if len(pts) < 3:
return False
uniqueSet = Set( item for item in pts )
ids = [ pts.index( item ) for item in uniqueSet ]
sl = voronoi.SiteList( [ voronoi.Site( *i ) for i in uniqueSet ] )
c.triangulate = True
voronoi.voronoi( sl, c )
triangles = c.triangles
feat = QgsFeature()
nFeat = len( triangles )
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
for triangle in triangles:
indicies = list( triangle )
indicies.append( indicies[ 0 ] )
polygon = []
attrs = []
step = 0
for index in indicies:
vprovider.getFeatures( QgsFeatureRequest().setFilterFid( ptDict[ ids[ index ] ] ) ).nextFeature( inFeat )
geom = QgsGeometry( inFeat.geometry() )
point = QgsPoint( geom.asPoint() )
polygon.append( point )
if step <= 3:
attrs.append(ids[ index ] )
step += 1
feat.setAttributes(attrs)
geometry = QgsGeometry().fromPolygon( [ polygon ] )
feat.setGeometry( geometry )
writer.addFeature( feat )
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
del writer
return True
def voronoi_polygons( self ):
vprovider = self.vlayer.dataProvider()
writer = QgsVectorFileWriter( self.myName, self.myEncoding, vprovider.fields(),
QGis.WKBPolygon, vprovider.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
extent = self.vlayer.extent()
extraX = extent.height() * ( self.myParam / 100.00 )
extraY = extent.width() * ( self.myParam / 100.00 )
height = extent.height()
width = extent.width()
c = voronoi.Context()
pts = []
ptDict = {}
ptNdx = -1
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
geom = QgsGeometry( inFeat.geometry() )
point = geom.asPoint()
x = point.x() - extent.xMinimum()
y = point.y() - extent.yMinimum()
pts.append( ( x, y ) )
ptNdx +=1
ptDict[ ptNdx ] = inFeat.id()
self.vlayer = None
if len( pts ) < 3:
return False
uniqueSet = Set( item for item in pts )
ids = [ pts.index( item ) for item in uniqueSet ]
sl = voronoi.SiteList( [ voronoi.Site( i[ 0 ], i[ 1 ], sitenum = j ) for j, i in enumerate( uniqueSet ) ] )
voronoi.voronoi( sl, c )
inFeat = QgsFeature()
nFeat = len( c.polygons )
nElement = 0
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, nFeat ) )
for site, edges in c.polygons.iteritems():
vprovider.getFeatures( QgsFeatureRequest().setFilterFid( ptDict[ ids[ site ] ] ) ).nextFeature( inFeat )
lines = self.clip_voronoi( edges, c, width, height, extent, extraX, extraY )
geom = QgsGeometry.fromMultiPoint( lines )
geom = QgsGeometry( geom.convexHull() )
outFeat.setGeometry( geom )
outFeat.setAttributes( inFeat.attributes() )
writer.addFeature( outFeat )
nElement += 1
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
del writer
return True
def clip_voronoi( self, edges, c, width, height, extent, exX, exY ):
""" Clip voronoi function based on code written for Inkscape
Copyright (C) 2010 Alvin Penner, penner@vaxxine.com
"""
def clip_line( x1, y1, x2, y2, w, h, x, y ):
if x1 < 0 - x and x2 < 0 - x:
return [ 0, 0, 0, 0 ]
if x1 > w + x and x2 > w + x:
return [ 0, 0, 0, 0 ]
if x1 < 0 - x:
y1 = ( y1 * x2 - y2 * x1 ) / ( x2 - x1 )
x1 = 0 - x
if x2 < 0 - x:
y2 = ( y1 * x2 - y2 * x1 ) / ( x2 - x1 )
x2 = 0 - x
if x1 > w + x:
y1 = y1 + ( w + x - x1 ) * ( y2 - y1 ) / ( x2 - x1 )
x1 = w + x
if x2 > w + x:
y2 = y1 + ( w + x - x1 ) *( y2 - y1 ) / ( x2 - x1 )
x2 = w + x
if y1 < 0 - y and y2 < 0 - y:
return [ 0, 0, 0, 0 ]
if y1 > h + y and y2 > h + y:
return [ 0, 0, 0, 0 ]
if x1 == x2 and y1 == y2:
return [ 0, 0, 0, 0 ]
if y1 < 0 - y:
x1 = ( x1 * y2 - x2 * y1 ) / ( y2 - y1 )
y1 = 0 - y
if y2 < 0 - y:
x2 = ( x1 * y2 - x2 * y1 ) / ( y2 - y1 )
y2 = 0 - y
if y1 > h + y:
x1 = x1 + ( h + y - y1 ) * ( x2 - x1 ) / ( y2 - y1 )
y1 = h + y
if y2 > h + y:
x2 = x1 + ( h + y - y1) * ( x2 - x1 ) / ( y2 - y1 )
y2 = h + y
return [ x1, y1, x2, y2 ]
lines = []
hasXMin = False
hasYMin = False
hasXMax = False
hasYMax = False
for edge in edges:
if edge[ 1 ] >= 0 and edge[ 2 ] >= 0: # two vertices
[ x1, y1, x2, y2 ] = clip_line( c.vertices[ edge[ 1 ] ][ 0 ], c.vertices[ edge[ 1 ] ][ 1 ], c.vertices[ edge[ 2 ] ][ 0 ], c.vertices[ edge[ 2 ] ][ 1 ], width, height, exX, exY )
elif edge[ 1 ] >= 0: # only one vertex
if c.lines[ edge[ 0 ] ][ 1 ] == 0: # vertical line
xtemp = c.lines[ edge[ 0 ] ][ 2 ] / c.lines[ edge[ 0 ] ][ 0 ]
if c.vertices[ edge[ 1 ] ][ 1 ] > ( height + exY ) / 2:
ytemp = height + exY
else:
ytemp = 0 - exX
else:
xtemp = width + exX
ytemp = ( c.lines[ edge[ 0 ] ][ 2 ] - ( width + exX ) * c.lines[ edge[ 0 ] ][ 0 ] ) / c.lines[ edge[ 0 ] ][ 1 ]
[ x1, y1, x2, y2 ] = clip_line( c.vertices[ edge[ 1 ] ][ 0 ], c.vertices[ edge[ 1 ] ][ 1 ], xtemp, ytemp, width, height, exX, exY )
elif edge[ 2 ] >= 0: # only one vertex
if c.lines[ edge[ 0 ] ][ 1 ] == 0: # vertical line
xtemp = c.lines[ edge[ 0 ] ][ 2 ] / c.lines[ edge[ 0 ] ][ 0 ]
if c.vertices[ edge[ 2 ] ][ 1 ] > ( height + exY ) / 2:
ytemp = height + exY
else:
ytemp = 0.0 - exY
else:
xtemp = 0.0 - exX
ytemp = c.lines[ edge[ 0 ] ][ 2 ] / c.lines[ edge[ 0 ] ][ 1 ]
[ x1, y1, x2, y2 ] = clip_line( xtemp, ytemp, c.vertices[ edge[ 2 ] ][ 0 ], c.vertices[ edge[ 2 ] ][ 1 ], width, height, exX, exY )
if x1 or x2 or y1 or y2:
lines.append( QgsPoint( x1 + extent.xMinimum(), y1 + extent.yMinimum() ) )
lines.append( QgsPoint( x2 + extent.xMinimum(), y2 + extent.yMinimum() ) )
if 0 - exX in ( x1, x2 ):
hasXMin = True
if 0 - exY in ( y1, y2 ):
hasYMin = True
if height + exY in ( y1, y2 ):
hasYMax = True
if width + exX in ( x1, x2 ):
hasXMax = True
if hasXMin:
if hasYMax:
lines.append( QgsPoint( extent.xMinimum() - exX, height + extent.yMinimum() + exY ) )
if hasYMin:
lines.append( QgsPoint( extent.xMinimum() - exX, extent.yMinimum() - exY ) )
if hasXMax:
if hasYMax:
lines.append( QgsPoint( width + extent.xMinimum() + exX, height + extent.yMinimum() + exY ) )
if hasYMin:
lines.append( QgsPoint( width + extent.xMinimum() + exX, extent.yMinimum() - exY ) )
return lines
def layer_extent( self ):
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, 0 ) )
fields = QgsFields()
fields.append( QgsField( "MINX", QVariant.Double ) )
fields.append( QgsField( "MINY", QVariant.Double ) )
fields.append( QgsField( "MAXX", QVariant.Double ) )
fields.append( QgsField( "MAXY", QVariant.Double ) )
fields.append( QgsField( "CNTX", QVariant.Double ) )
fields.append( QgsField( "CNTY", QVariant.Double ) )
fields.append( QgsField( "AREA", QVariant.Double ) )
fields.append( QgsField( "PERIM", QVariant.Double ) )
fields.append( QgsField( "HEIGHT", QVariant.Double ) )
fields.append( QgsField( "WIDTH", QVariant.Double ) )
writer = QgsVectorFileWriter( self.myName, self.myEncoding, fields,
QGis.WKBPolygon, self.vlayer.crs() )
rect = self.vlayer.extent()
minx = rect.xMinimum()
miny = rect.yMinimum()
maxx = rect.xMaximum()
maxy = rect.yMaximum()
height = rect.height()
width = rect.width()
cntx = minx + ( width / 2.0 )
cnty = miny + ( height / 2.0 )
area = width * height
perim = ( 2 * width ) + (2 * height )
rect = [ QgsPoint( minx, miny ),
QgsPoint( minx, maxy ),
QgsPoint( maxx, maxy ),
QgsPoint( maxx, miny ),
QgsPoint( minx, miny ) ]
geometry = QgsGeometry().fromPolygon( [ rect ] )
feat = QgsFeature()
feat.setGeometry( geometry )
feat.setAttributes( [ minx,
miny,
maxx,
maxy,
cntx,
cnty,
area,
perim,
height,
width ] )
writer.addFeature( feat )
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, 100 ) )
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
del writer
return True
def feature_extent( self ):
vprovider = self.vlayer.dataProvider()
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), 0 )
fields = QgsFields()
fields.append( QgsField( "MINX", QVariant.Double ) )
fields.append( QgsField( "MINY", QVariant.Double ) )
fields.append( QgsField( "MAXX", QVariant.Double ) )
fields.append( QgsField( "MAXY", QVariant.Double ) )
fields.append( QgsField( "CNTX", QVariant.Double ) )
fields.append( QgsField( "CNTY", QVariant.Double ) )
fields.append( QgsField( "AREA", QVariant.Double ) )
fields.append( QgsField( "PERIM", QVariant.Double ) )
fields.append( QgsField( "HEIGHT", QVariant.Double ) )
fields.append( QgsField( "WIDTH", QVariant.Double ) )
writer = QgsVectorFileWriter( self.myName, self.myEncoding, fields,
QGis.WKBPolygon, self.vlayer.crs() )
inFeat = QgsFeature()
outFeat = QgsFeature()
nElement = 0
if self.useSelection:
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), (0, self.vlayer.selectedFeatureCount() ) )
for inFeat in self.vlayer.selectedFeatures():
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
nElement += 1
rect = inFeat.geometry().boundingBox()
minx = rect.xMinimum()
miny = rect.yMinimum()
maxx = rect.xMaximum()
maxy = rect.yMaximum()
height = rect.height()
width = rect.width()
cntx = minx + ( width / 2.0 )
cnty = miny + ( height / 2.0 )
area = width * height
perim = ( 2 * width ) + ( 2 * height )
rect = [ QgsPoint( minx, miny ),
QgsPoint( minx, maxy ),
QgsPoint( maxx, maxy ),
QgsPoint( maxx, miny ),
QgsPoint( minx, miny ) ]
geometry = QgsGeometry().fromPolygon( [ rect ] )
outFeat.setGeometry( geometry )
outFeat.setAttributes( [ minx,
miny,
maxx,
maxy,
cntx,
cnty,
area,
perim,
height,
width ] )
writer.addFeature( outFeat )
else:
self.emit( SIGNAL( "runRange( PyQt_PyObject )" ), ( 0, vprovider.featureCount() ) )
fit = vprovider.getFeatures()
while fit.nextFeature( inFeat ):
self.emit( SIGNAL( "runStatus( PyQt_PyObject )" ), nElement )
nElement += 1
rect = inFeat.geometry().boundingBox()
minx = rect.xMinimum()
miny = rect.yMinimum()
maxx = rect.xMaximum()
maxy = rect.yMaximum()
height = rect.height()
width = rect.width()
cntx = minx + ( width / 2.0 )
cnty = miny + ( height / 2.0 )
area = width * height
perim = ( 2 * width ) + ( 2 * height )
rect = [ QgsPoint( minx, miny ),
QgsPoint( minx, maxy ),
QgsPoint( maxx, maxy ),
QgsPoint( maxx, miny ),
QgsPoint( minx, miny ) ]
geometry = QgsGeometry().fromPolygon( [ rect ] )
outFeat.setGeometry( geometry )
outFeat.setAttributes( [ minx,
miny,
maxx,
maxy,
cntx,
cnty,
area,
perim,
height,
width ] )
writer.addFeature( outFeat )
del writer
return True
def simpleMeasure( self, inGeom, calcType, ellips, crs ):
if inGeom.wkbType() in ( QGis.WKBPoint, QGis.WKBPoint25D ):
pt = inGeom.asPoint()
attr1 = pt.x()
attr2 = pt.y()
elif inGeom.wkbType() in ( QGis.WKBMultiPoint, QGis.WKBMultiPoint25D ):
pt = inGeom.asMultiPoint()
attr1 = pt[ 0 ].x()
attr2 = pt[ 0 ].y()
else:
measure = QgsDistanceArea()
if calcType == 2:
measure.setSourceCrs( crs )
measure.setEllipsoid( ellips )
measure.setEllipsoidalMode( True )
attr1 = measure.measure( inGeom )
if inGeom.type() == QGis.Polygon:
attr2 = self.perimMeasure( inGeom, measure )
else:
attr2 = attr1
return ( attr1, attr2 )
def perimMeasure( self, inGeom, measure ):
value = 0.00
if inGeom.isMultipart():
poly = inGeom.asMultiPolygon()
for k in poly:
for j in k:
value = value + measure.measureLine( j )
else:
poly = inGeom.asPolygon()
for k in poly:
value = value + measure.measureLine( k )
return value
def doubleFieldIndex( self, name, desc, fieldList ):
i = 0
for f in fieldList:
if name == f.name().upper():
return (i, fieldList )
i += 1
fieldList.append( QgsField( name, QVariant.Double, "double precision", 21, 6, desc ) )
return ( len(fieldList)-1, fieldList )
def checkMeasurementFields( self, vlayer, add ):
vprovider = vlayer.dataProvider()
geomType = vlayer.geometryType()
fieldList = vprovider.fields()
idx = len(fieldList)
if geomType == QGis.Polygon:
(index1, fieldList) = self.doubleFieldIndex( "AREA", self.tr( "Polygon area" ), fieldList )
(index2, fieldList) = self.doubleFieldIndex( "PERIMETER", self.tr( "Polygon perimeter" ), fieldList )
elif geomType == QGis.Line:
(index1, fieldList) = self.doubleFieldIndex( "LENGTH", self.tr( "Line length" ), fieldList )
index2 = index1
else:
(index1, fieldList) = self.doubleFieldIndex( "XCOORD", self.tr( "Point x ordinate" ), fieldList )
(index2, fieldList) = self.doubleFieldIndex( "YCOORD", self.tr( "Point y ordinate" ), fieldList )
if add and idx<len(fieldList):
newFields = []
for i in range(idx,len(fieldList)):
newFields.append(fieldList[i])
vprovider.addAttributes( newFields )
return ( fieldList, index1, index2 )
def extractAsLine( self, geom ):
multi_geom = QgsGeometry()
temp_geom = []
if geom.type() == 2:
if geom.isMultipart():
multi_geom = geom.asMultiPolygon()
for i in multi_geom:
temp_geom.extend( i )
else:
multi_geom = geom.asPolygon()
temp_geom = multi_geom
return temp_geom
else:
return []
def remove_bad_lines( self, lines ):
temp_geom = []
if len( lines ) == 1:
if len( lines[ 0 ] ) > 2:
temp_geom = lines
else:
temp_geom = []
else:
temp_geom = [ elem for elem in lines if len( elem ) > 2 ]
return temp_geom
def singleToMultiGeom( self, wkbType ):
try:
if wkbType in ( QGis.WKBPoint, QGis.WKBMultiPoint,
QGis.WKBPoint25D, QGis.WKBMultiPoint25D ):
return QGis.WKBMultiPoint
elif wkbType in ( QGis.WKBLineString, QGis.WKBMultiLineString,
QGis.WKBMultiLineString25D, QGis.WKBLineString25D ):
return QGis.WKBMultiLineString
elif wkbType in ( QGis.WKBPolygon, QGis.WKBMultiPolygon,
QGis.WKBMultiPolygon25D, QGis.WKBPolygon25D ):
return QGis.WKBMultiPolygon
else:
return QGis.WKBUnknown
except Exception, err:
print str( err )
def multiToSingleGeom( self, wkbType ):
try:
if wkbType in ( QGis.WKBPoint, QGis.WKBMultiPoint,
QGis.WKBPoint25D, QGis.WKBMultiPoint25D ):
return QGis.WKBPoint
elif wkbType in ( QGis.WKBLineString, QGis.WKBMultiLineString,
QGis.WKBMultiLineString25D, QGis.WKBLineString25D ):
return QGis.WKBLineString
elif wkbType in ( QGis.WKBPolygon, QGis.WKBMultiPolygon,
QGis.WKBMultiPolygon25D, QGis.WKBPolygon25D ):
return QGis.WKBPolygon
else:
return QGis.WKBUnknown
except Exception, err:
print str( err )
def extractAsSingle( self, geom ):
multi_geom = QgsGeometry()
temp_geom = []
if geom.type() == 0:
if geom.isMultipart():
multi_geom = geom.asMultiPoint()
for i in multi_geom:
temp_geom.append( QgsGeometry().fromPoint ( i ) )
else:
temp_geom.append( geom )
elif geom.type() == 1:
if geom.isMultipart():
multi_geom = geom.asMultiPolyline()
for i in multi_geom:
temp_geom.append( QgsGeometry().fromPolyline( i ) )
else:
temp_geom.append( geom )
elif geom.type() == 2:
if geom.isMultipart():
multi_geom = geom.asMultiPolygon()
for i in multi_geom:
temp_geom.append( QgsGeometry().fromPolygon( i ) )
else:
temp_geom.append( geom )
return temp_geom
def extractAsMulti( self, geom ):
temp_geom = []
if geom.type() == 0:
if geom.isMultipart():
return geom.asMultiPoint()
else:
return [ geom.asPoint() ]
elif geom.type() == 1:
if geom.isMultipart():
return geom.asMultiPolyline()
else:
return [ geom.asPolyline() ]
else:
if geom.isMultipart():
return geom.asMultiPolygon()
else:
return [ geom.asPolygon() ]
def convertGeometry( self, geom_list, vType ):
if vType == 0:
return QgsGeometry().fromMultiPoint( geom_list )
elif vType == 1:
return QgsGeometry().fromMultiPolyline( geom_list )
else:
return QgsGeometry().fromMultiPolygon( geom_list )
|
