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# -*- coding: utf-8 -*-
"""
***************************************************************************
ogrinfo.py
---------------------
Date : November 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* 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. *
* *
***************************************************************************
"""
__author__ = 'Victor Olaya'
__date__ = 'November 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import string
import re
try:
from osgeo import ogr
ogrAvailable = True
except:
ogrAvailable = False
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
from processing.parameters.ParameterVector import ParameterVector
from processing.outputs.OutputHTML import OutputHTML
from OgrAlgorithm import OgrAlgorithm
class OgrInfo(OgrAlgorithm):
OUTPUT = 'OUTPUT'
INPUT_LAYER = 'INPUT_LAYER'
def defineCharacteristics(self):
self.name = 'Information'
self.group = '[OGR] Miscellaneous'
self.addParameter(ParameterVector(self.INPUT_LAYER, 'Input layer',
[ParameterVector.VECTOR_TYPE_ANY], False))
self.addOutput(OutputHTML(self.OUTPUT, 'Layer information'))
def commandLineName(self):
return "gdalogr:vectorinfo"
def processAlgorithm(self, progress):
input = self.getParameterValue(self.INPUT_LAYER)
ogrLayer = self.ogrConnectionString(input)
output = self.getOutputValue(self.OUTPUT)
self.ogrinfo(ogrLayer)
f = open(output, 'w')
f.write('<pre>' + self.info + '</pre>')
f.close()
def out(self, text):
self.info = self.info + text + '\n'
def ogrinfo(self, pszDataSource):
bVerbose = True
bSummaryOnly = True
self.info = ''
if not ogrAvailable:
self.info = 'OGR bindings not installed'
return
qDebug("Opening data source '%s'" % pszDataSource)
poDS = ogr.Open(pszDataSource, False)
if poDS is None:
self.info = self.failure(pszDataSource)
return
poDriver = poDS.GetDriver()
if bVerbose:
self.out("INFO: Open of `%s'\n using driver `%s' successful."
% (pszDataSource, poDriver.GetName()))
poDS_Name = poDS.GetName()
if str(type(pszDataSource)) == "<type 'unicode'>" \
and str(type(poDS_Name)) == "<type 'str'>":
poDS_Name = unicode(poDS_Name, 'utf8')
if bVerbose and pszDataSource != poDS_Name:
self.out("INFO: Internal data source name '%s'\n \
different from user name '%s'." \
% (poDS_Name, pszDataSource))
# --------------------------------------------------------------------
# Process each data source layer.
# --------------------------------------------------------------------
for iLayer in range(poDS.GetLayerCount()):
poLayer = poDS.GetLayer(iLayer)
if poLayer is None:
self.out("FAILURE: Couldn't fetch advertised layer %d!"
% iLayer)
return 1
self.ReportOnLayer(poLayer)
def ReportOnLayer(
self,
poLayer,
pszWHERE=None,
poSpatialFilter=None,
):
bVerbose = True
poDefn = poLayer.GetLayerDefn()
# --------------------------------------------------------------------
# Set filters if provided.
# --------------------------------------------------------------------
if pszWHERE is not None:
if poLayer.SetAttributeFilter(pszWHERE) != 0:
self.out('FAILURE: SetAttributeFilter(%s) failed.' % pszWHERE)
return
if poSpatialFilter is not None:
poLayer.SetSpatialFilter(poSpatialFilter)
# --------------------------------------------------------------------
# Report various overall information.
# --------------------------------------------------------------------
self.out('')
self.out('Layer name: %s' % poDefn.GetName())
if bVerbose:
self.out('Geometry: %s'
% ogr.GeometryTypeToName(poDefn.GetGeomType()))
self.out('Feature Count: %d' % poLayer.GetFeatureCount())
oExt = poLayer.GetExtent(True, can_return_null=True)
if oExt is not None:
self.out('Extent: (%f, %f) - (%f, %f)' % (oExt[0], oExt[1],
oExt[2], oExt[3]))
if poLayer.GetSpatialRef() is None:
pszWKT = '(unknown)'
else:
pszWKT = poLayer.GetSpatialRef().ExportToPrettyWkt()
self.out('Layer SRS WKT:\n%s' % pszWKT)
if len(poLayer.GetFIDColumn()) > 0:
self.out('FID Column = %s' % poLayer.GetFIDColumn())
if len(poLayer.GetGeometryColumn()) > 0:
self.out('Geometry Column = %s' % poLayer.GetGeometryColumn())
for iAttr in range(poDefn.GetFieldCount()):
poField = poDefn.GetFieldDefn(iAttr)
self.out('%s: %s (%d.%d)' % (poField.GetNameRef(),
poField.GetFieldTypeName(poField.GetType()),
poField.GetWidth(), poField.GetPrecision()))
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