Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 3341:51f037483071

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Backend: Strategy to directly transform native SQL results into Maps. flys-backend/trunk@4955 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 12 Jul 2012 14:51:23 +0000
parents 998f1a7dcfde
children 59ca5dab2782
rev   line source
2861
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
1 import ogr, osr
2853
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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2
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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3 class Importer:
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
4
2861
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
5 def __init__(self, dbconn, river_id, dest_srs):
2853
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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6 self.dbconn = dbconn
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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7 self.river_id = river_id
2861
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
8 self.dest_srs = osr.SpatialReference()
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
9 self.dest_srs.ImportFromEPSG(dest_srs)
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bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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10
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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11
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
12 def getKind(self, path):
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
13 raise NotImplementedError("Importer.getKind is abstract!")
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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14
bd9e76e0b55d Improved the python shapefile importer.
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15
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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16 def getPath(self, base):
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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17 raise NotImplementedError("Importer.getPath is abstract!")
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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18
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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19
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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20 def getTablename(self):
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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21 raise NotImplementedError("Importer.getTablename is abstract!")
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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22
bd9e76e0b55d Improved the python shapefile importer.
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23
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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24 def IsFieldSet(self, feat, name):
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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25 try:
bd9e76e0b55d Improved the python shapefile importer.
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26 isset = feat.GetField(name)
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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27 return isset is not None
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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28 except:
bd9e76e0b55d Improved the python shapefile importer.
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29 return False
bd9e76e0b55d Improved the python shapefile importer.
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30
bd9e76e0b55d Improved the python shapefile importer.
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31
bd9e76e0b55d Improved the python shapefile importer.
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32 def IsDoubleFieldSet(self, feat, name):
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
33 try:
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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34 isset = feat.GetFieldAsDouble(name)
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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35 return isset is not None
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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36 except:
bd9e76e0b55d Improved the python shapefile importer.
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37 return False
bd9e76e0b55d Improved the python shapefile importer.
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38
bd9e76e0b55d Improved the python shapefile importer.
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39
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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40 def isShapeRelevant(self, name, path):
bd9e76e0b55d Improved the python shapefile importer.
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41 return True
bd9e76e0b55d Improved the python shapefile importer.
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42
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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43
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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44 def walkOverShapes(self, shape):
2862
998f1a7dcfde New shape importers and schema modifications.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2861
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45 print "---"
2853
bd9e76e0b55d Improved the python shapefile importer.
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46 (name, path) = shape
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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47 if not self.isShapeRelevant(name, path):
bd9e76e0b55d Improved the python shapefile importer.
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48 print "Skip shapefile '%s'" % name
bd9e76e0b55d Improved the python shapefile importer.
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49 return
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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50
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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51 shp = ogr.Open(shape[1])
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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52 if shp is None:
bd9e76e0b55d Improved the python shapefile importer.
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53 print "Shapefile '%s' could not be opened!" % path
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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54 return
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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55
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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56 print "Opened shapefile '%s'" % path
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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57 srcLayer = shp.GetLayerByName(name)
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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58
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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59 if srcLayer is None:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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60 print "Layer '%s' was not found!" % name
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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61 return
bd9e76e0b55d Improved the python shapefile importer.
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62
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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63 return self.shape2Database(srcLayer, name, path)
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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64
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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65
2861
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
66 def transform(self, feat):
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
67 geometry = feat.GetGeometryRef()
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
68 src_srs = geometry.GetSpatialReference()
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
69
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
70 if src_srs is None:
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
71 print "Error: No source SRS given! No transformation possible!"
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
72 return feat
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
73
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
74 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
75 geometry.Transform(transformer)
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
76
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
77 return feat
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
78
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
79
2853
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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80 def shape2Database(self, srcLayer, name, path):
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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81 table = ogr.Open(self.dbconn)
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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82 destLayer = table.GetLayerByName(self.getTablename())
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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83
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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84 if srcLayer is None:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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85 print "Shapefile is None!"
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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86 return -1
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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87
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
88 if destLayer is None:
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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89 print "No destination layer given!"
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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90 return -1
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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91
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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92 count = srcLayer.GetFeatureCount()
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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93 print "Try to add %i features to database." % count
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
94
bd9e76e0b55d Improved the python shapefile importer.
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95 srcLayer.ResetReading()
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
96
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
97 geomType = -1
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98 success = 0
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diff changeset
99 unsupported = 0
2861
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
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100 creationFailed = 0
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parents:
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101 featureDef = destLayer.GetLayerDefn()
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
102
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
103 for feat in srcLayer:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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104 geom = feat.GetGeometryRef()
2861
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
105
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parents: 2853
diff changeset
106 if geom is None:
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
diff changeset
107 continue
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parents: 2853
diff changeset
108
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bd9e76e0b55d Improved the python shapefile importer.
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parents:
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109 geomType = geom.GetGeometryType()
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parents:
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110
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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111 if self.isGeometryValid(geomType):
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parents:
diff changeset
112 newFeat = self.createNewFeature(featureDef,
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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113 feat,
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parents:
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114 name=name,
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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115 path=path)
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parents:
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116
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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117 if newFeat is not None:
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parents: 2853
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118 newFeat = self.transform(newFeat)
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bd9e76e0b55d Improved the python shapefile importer.
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parents:
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119 res = destLayer.CreateFeature(newFeat)
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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120 if res is None or res > 0:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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121 print "Error while inserting feature: %r" % res
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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122 else:
bd9e76e0b55d Improved the python shapefile importer.
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123 success = success + 1
2861
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parents: 2853
diff changeset
124 else:
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
125 creationFailed = creationFailed + 1
2853
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126 else:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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127 unsupported = unsupported + 1
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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128
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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129 print "Inserted %i features" % success
2861
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
130 print "Failed to create %i features" % creationFailed
2853
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
131 print "Found %i unsupported features" % unsupported
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
132
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
133 try:
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
134 destLayer.CommitTransaction()
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
135 except e:
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
136 print "Exception while committing transaction."
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
137
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
138 return geomType
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
139
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