annotate flys-backend/contrib/shpimporter/importer.py @ 3334:2ae732e2c65c

FLYS backend: Removed trailing whitespace. flys-backend/trunk@4669 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 15 Jun 2012 09:20:49 +0000
parents 998f1a7dcfde
children 59ca5dab2782
rev   line source
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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
1 import ogr, osr
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2
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3 class Importer:
bd9e76e0b55d Improved the python shapefile importer.
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4
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5 def __init__(self, dbconn, river_id, dest_srs):
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6 self.dbconn = dbconn
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7 self.river_id = river_id
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parents: 2853
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8 self.dest_srs = osr.SpatialReference()
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parents: 2853
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9 self.dest_srs.ImportFromEPSG(dest_srs)
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10
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11
bd9e76e0b55d Improved the python shapefile importer.
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12 def getKind(self, path):
bd9e76e0b55d Improved the python shapefile importer.
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13 raise NotImplementedError("Importer.getKind is abstract!")
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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):
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17 raise NotImplementedError("Importer.getPath is abstract!")
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18
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19
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20 def getTablename(self):
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21 raise NotImplementedError("Importer.getTablename is abstract!")
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22
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23
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24 def IsFieldSet(self, feat, name):
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25 try:
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26 isset = feat.GetField(name)
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27 return isset is not None
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28 except:
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29 return False
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30
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31
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32 def IsDoubleFieldSet(self, feat, name):
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33 try:
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34 isset = feat.GetFieldAsDouble(name)
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35 return isset is not None
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36 except:
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37 return False
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38
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39
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40 def isShapeRelevant(self, name, path):
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41 return True
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42
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43
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44 def walkOverShapes(self, shape):
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45 print "---"
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46 (name, path) = shape
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47 if not self.isShapeRelevant(name, path):
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48 print "Skip shapefile '%s'" % name
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49 return
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50
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51 shp = ogr.Open(shape[1])
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52 if shp is None:
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53 print "Shapefile '%s' could not be opened!" % path
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54 return
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55
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56 print "Opened shapefile '%s'" % path
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57 srcLayer = shp.GetLayerByName(name)
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58
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59 if srcLayer is None:
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60 print "Layer '%s' was not found!" % name
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61 return
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62
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63 return self.shape2Database(srcLayer, name, path)
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64
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65
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parents: 2853
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66 def transform(self, feat):
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parents: 2853
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67 geometry = feat.GetGeometryRef()
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parents: 2853
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68 src_srs = geometry.GetSpatialReference()
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parents: 2853
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69
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parents: 2853
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70 if src_srs is None:
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parents: 2853
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71 print "Error: No source SRS given! No transformation possible!"
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parents: 2853
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72 return feat
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parents: 2853
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73
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parents: 2853
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74 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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parents: 2853
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75 geometry.Transform(transformer)
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parents: 2853
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76
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parents: 2853
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77 return feat
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parents: 2853
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78
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parents: 2853
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79
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80 def shape2Database(self, srcLayer, name, path):
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81 table = ogr.Open(self.dbconn)
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82 destLayer = table.GetLayerByName(self.getTablename())
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83
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84 if srcLayer is None:
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85 print "Shapefile is None!"
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86 return -1
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87
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88 if destLayer is None:
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89 print "No destination layer given!"
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90 return -1
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91
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92 count = srcLayer.GetFeatureCount()
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93 print "Try to add %i features to database." % count
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94
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95 srcLayer.ResetReading()
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96
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97 geomType = -1
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98 success = 0
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99 unsupported = 0
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100 creationFailed = 0
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101 featureDef = destLayer.GetLayerDefn()
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102
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103 for feat in srcLayer:
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104 geom = feat.GetGeometryRef()
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105
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106 if geom is None:
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107 continue
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108
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109 geomType = geom.GetGeometryType()
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110
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111 if self.isGeometryValid(geomType):
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112 newFeat = self.createNewFeature(featureDef,
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113 feat,
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114 name=name,
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115 path=path)
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116
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117 if newFeat is not None:
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118 newFeat = self.transform(newFeat)
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119 res = destLayer.CreateFeature(newFeat)
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120 if res is None or res > 0:
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121 print "Error while inserting feature: %r" % res
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122 else:
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123 success = success + 1
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124 else:
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125 creationFailed = creationFailed + 1
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126 else:
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127 unsupported = unsupported + 1
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128
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129 print "Inserted %i features" % success
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130 print "Failed to create %i features" % creationFailed
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parents:
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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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