Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 2861:b0132e1b9719

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Added further shape importers and added the option to reproject shapes during the import process. flys-backend/trunk@4342 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 03 May 2012 14:19:52 +0000
parents bd9e76e0b55d
children 998f1a7dcfde
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
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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:
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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):
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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.
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7 self.river_id = river_id
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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.
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parents:
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10
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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11
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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12 def getKind(self, path):
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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13 raise NotImplementedError("Importer.getKind is abstract!")
bd9e76e0b55d Improved the python shapefile importer.
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14
bd9e76e0b55d Improved the python shapefile importer.
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15
bd9e76e0b55d Improved the python shapefile importer.
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16 def getPath(self, base):
bd9e76e0b55d Improved the python shapefile importer.
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17 raise NotImplementedError("Importer.getPath is abstract!")
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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18
bd9e76e0b55d Improved the python shapefile importer.
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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.
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21 raise NotImplementedError("Importer.getTablename is abstract!")
bd9e76e0b55d Improved the python shapefile importer.
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22
bd9e76e0b55d Improved the python shapefile importer.
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23
bd9e76e0b55d Improved the python shapefile importer.
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24 def IsFieldSet(self, feat, name):
bd9e76e0b55d Improved the python shapefile importer.
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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.
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27 return isset is not None
bd9e76e0b55d Improved the python shapefile importer.
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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:
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33 try:
bd9e76e0b55d Improved the python shapefile importer.
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34 isset = feat.GetFieldAsDouble(name)
bd9e76e0b55d Improved the python shapefile importer.
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35 return isset is not None
bd9e76e0b55d Improved the python shapefile importer.
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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.
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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.
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43
bd9e76e0b55d Improved the python shapefile importer.
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44 def walkOverShapes(self, shape):
bd9e76e0b55d Improved the python shapefile importer.
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45 (name, path) = shape
bd9e76e0b55d Improved the python shapefile importer.
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46 if not self.isShapeRelevant(name, path):
bd9e76e0b55d Improved the python shapefile importer.
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47 print "Skip shapefile '%s'" % name
bd9e76e0b55d Improved the python shapefile importer.
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48 return
bd9e76e0b55d Improved the python shapefile importer.
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49
bd9e76e0b55d Improved the python shapefile importer.
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50 shp = ogr.Open(shape[1])
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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51 if shp is None:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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52 print "Shapefile '%s' could not be opened!" % path
bd9e76e0b55d Improved the python shapefile importer.
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53 return
bd9e76e0b55d Improved the python shapefile importer.
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54
bd9e76e0b55d Improved the python shapefile importer.
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55 print "Opened shapefile '%s'" % path
bd9e76e0b55d Improved the python shapefile importer.
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56 srcLayer = shp.GetLayerByName(name)
bd9e76e0b55d Improved the python shapefile importer.
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57
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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58 if srcLayer is None:
bd9e76e0b55d Improved the python shapefile importer.
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59 print "Layer '%s' was not found!" % name
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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60 return
bd9e76e0b55d Improved the python shapefile importer.
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61
bd9e76e0b55d Improved the python shapefile importer.
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62 return self.shape2Database(srcLayer, name, path)
bd9e76e0b55d Improved the python shapefile importer.
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63
bd9e76e0b55d Improved the python shapefile importer.
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64
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
65 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
66 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
67 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
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68
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 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
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70 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
71 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
72
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
73 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
74 geometry.Transform(transformer)
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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75
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 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
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77
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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78
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bd9e76e0b55d Improved the python shapefile importer.
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parents:
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79 def shape2Database(self, srcLayer, name, path):
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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80 table = ogr.Open(self.dbconn)
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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81 destLayer = table.GetLayerByName(self.getTablename())
bd9e76e0b55d Improved the python shapefile importer.
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82
bd9e76e0b55d Improved the python shapefile importer.
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83 if srcLayer is None:
bd9e76e0b55d Improved the python shapefile importer.
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84 print "Shapefile is None!"
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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85 return -1
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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86
bd9e76e0b55d Improved the python shapefile importer.
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87 if destLayer is None:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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88 print "No destination layer given!"
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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89 return -1
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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90
bd9e76e0b55d Improved the python shapefile importer.
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91 count = srcLayer.GetFeatureCount()
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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92 print "Try to add %i features to database." % count
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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93
bd9e76e0b55d Improved the python shapefile importer.
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94 srcLayer.ResetReading()
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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95
bd9e76e0b55d Improved the python shapefile importer.
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96 geomType = -1
bd9e76e0b55d Improved the python shapefile importer.
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97 success = 0
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98 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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99 creationFailed = 0
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bd9e76e0b55d Improved the python shapefile importer.
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100 featureDef = destLayer.GetLayerDefn()
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
101
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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102 for feat in srcLayer:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
103 geom = feat.GetGeometryRef()
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parents: 2853
diff changeset
104
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parents: 2853
diff changeset
105 if geom is None:
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
106 continue
b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
107
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bd9e76e0b55d Improved the python shapefile importer.
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108 geomType = geom.GetGeometryType()
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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109
bd9e76e0b55d Improved the python shapefile importer.
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110 if self.isGeometryValid(geomType):
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
111 newFeat = self.createNewFeature(featureDef,
bd9e76e0b55d Improved the python shapefile importer.
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112 feat,
bd9e76e0b55d Improved the python shapefile importer.
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113 name=name,
bd9e76e0b55d Improved the python shapefile importer.
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114 path=path)
bd9e76e0b55d Improved the python shapefile importer.
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parents:
diff changeset
115
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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116 if newFeat is not None:
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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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117 newFeat = self.transform(newFeat)
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parents:
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118 res = destLayer.CreateFeature(newFeat)
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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119 if res is None or res > 0:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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120 print "Error while inserting feature: %r" % res
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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121 else:
bd9e76e0b55d Improved the python shapefile importer.
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122 success = success + 1
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parents: 2853
diff changeset
123 else:
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parents: 2853
diff changeset
124 creationFailed = creationFailed + 1
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bd9e76e0b55d Improved the python shapefile importer.
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125 else:
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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126 unsupported = unsupported + 1
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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127
bd9e76e0b55d Improved the python shapefile importer.
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128 print "Inserted %i features" % success
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b0132e1b9719 Added further shape importers and added the option to reproject shapes during the import process.
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parents: 2853
diff changeset
129 print "Failed to create %i features" % creationFailed
2853
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parents:
diff changeset
130 print "Found %i unsupported features" % unsupported
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
131
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
132 try:
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
133 destLayer.CommitTransaction()
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
134 except e:
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
135 print "Exception while committing transaction."
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
136
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
137 return geomType
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
138
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