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
|
#!/usr/bin/python
# Script : geocode_addresses.py
#
# Purpose: simple script to read a csv file, geocode the addresses
# with the Geocoder API and write to a new shapefile
#
# $Id: geocode_addresses.py 9921 2010-03-06 17:08:20Z tomkralidis $
#
import sys
import csv
import mapscript
import urllib
import urllib2
from lxml import etree
# uses dbfpy http://pypi.python.org/pypi/dbfpy/2.2.1
from dbfpy.dbf import *
# example invocation
# ./reproj.py ./foo.csv address_colnum, city_colnum, stateprov_colnum ./bar.csv
# check input parameters
if (len(sys.argv) != 6):
print sys.argv[0] + \
" <csvfile> <address_colnum> <city_colnum> <stateprov_colnum> <outfile>"
sys.exit(1)
# geocoder base request URL
sGeocoderUrl = "http://www.geocoder.ca/?geoit=xml&locate="
# set csv record indices
sAddress = int(sys.argv[2])
sCity = int(sys.argv[3])
sStateProv = int(sys.argv[4])
# open file
fCsv = open(sys.argv[1], 'r')
# read csv
csvIn = csv.reader(fCsv)
# create output shp/shx
msSFOut = mapscript.shapefileObj(sys.argv[-1], 1)
# create output dbf
dbfOut = Dbf(sys.argv[-1]+".dbf", new=True)
# add fields
dbfOut.addField(
("address", 'C', 255),
("city", 'C', 255),
("stateprov", 'C', 255),
("x", 'N', 6,2),
("y", 'N', 7,2)
)
for aRow in csvIn:
# concatenate request params
sRequest = aRow[sAddress] + "," + aRow[sCity] + "," + aRow[sStateProv]
# contatenate request params (escaped) and base URL
sRequest = sGeocoderUrl + urllib.quote(sRequest)
# make the HTTP request
ul2Response = urllib2.urlopen(sRequest)
# serialize into etree XML object
etTree = etree.parse(ul2Response)
sY = float(etTree.find('latt').text)
sX = float(etTree.find('longt').text)
# serialize mapscript pointObj and add to shapefile
msPoint = mapscript.pointObj(sX, sY)
msSFOut.addPoint(msPoint)
# add dbf record
dRec=dbfOut.newRecord()
dRec['address'] = aRow[sAddress]
dRec['city'] = aRow[sCity]
dRec['StateProv'] = aRow[sStateProv]
dRec['x'] = sX
dRec['y'] = sY
dRec.store()
# close files
fCsv.close()
dbfOut.close()
|
