Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4740:fb135e1dfa35

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Added 'type' attribute to <dc:variable/> element. If an optional 'type' attribute is given the result of the XPATH expression is interpreted as this type. Valid values are 'number', 'bool', 'node' and 'nodeset'. All other defaults to 'string' which also is the default if nor type is given.
author Sascha L. Teichmann <teichmann@intevation.de>
date Wed, 02 Jan 2013 15:31:53 +0100
parents 82e931f88137
children 890eaa0a5162
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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8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
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2 import shpimporter
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bd9e76e0b55d Improved the python shapefile importer.
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3
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4 class Importer:
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5
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6 def __init__(self, config):
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7 self.config = config
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8 self.dbconn = 'OCI:%s/%s@%s' % (config.user, config.password, config.host)
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9 self.river_id = config.river_id
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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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10 self.dest_srs = osr.SpatialReference()
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11 self.dest_srs.ImportFromEPSG(config.target_srs)
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12
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13
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14 def getKind(self, path):
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15 raise NotImplementedError("Importer.getKind is abstract!")
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16
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17
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18 def getPath(self, base):
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19 raise NotImplementedError("Importer.getPath is abstract!")
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20
bd9e76e0b55d Improved the python shapefile importer.
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21
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22 def getTablename(self):
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23 raise NotImplementedError("Importer.getTablename is abstract!")
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24
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25
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26 def getName(self):
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27 raise NotImplementedError("Importer.getTablename is abstract!")
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28
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29
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30 def IsFieldSet(self, feat, name):
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31 try:
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32 isset = feat.GetField(name)
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33 return isset is not None
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34 except:
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35 return False
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36
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37
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38 def IsDoubleFieldSet(self, feat, name):
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39 try:
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40 isset = feat.GetFieldAsDouble(name)
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41 return isset is not None
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42 except:
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43 return False
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44
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45
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46 def isShapeRelevant(self, name, path):
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47 return True
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48
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49
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50 def walkOverShapes(self, shape):
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51 (name, path) = shape
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52 if not self.isShapeRelevant(name, path):
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53 shpimporter.INFO("Skip shapefile '%s'" % path)
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54 return
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55
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56 shp = ogr.Open(shape[1])
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57 if shp is None:
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58 shpimporter.ERROR("Shapefile '%s' could not be opened!" % path)
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59 return
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60
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61 shpimporter.INFO("Processing shapefile '%s'" % path)
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62 srcLayer = shp.GetLayerByName(name)
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63
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64 if srcLayer is None:
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65 shpimporter.ERROR("Layer '%s' was not found!" % name)
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66 return
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67
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68 return self.shape2Database(srcLayer, name, path)
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69
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70
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71 def transform(self, feat):
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72 geometry = feat.GetGeometryRef()
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73 src_srs = geometry.GetSpatialReference()
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74
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75 if src_srs is None:
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76 shpimporter.ERROR("No source SRS given! No transformation possible!")
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77 return feat
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78
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79 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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80 geometry.Transform(transformer)
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81
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82 return feat
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83
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84
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85 def shape2Database(self, srcLayer, name, path):
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86 table = ogr.Open(self.dbconn)
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87 destLayer = table.GetLayerByName(self.getTablename())
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88
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89 if srcLayer is None:
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90 shpimporter.ERROR("Shapefile is None!")
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91 return -1
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92
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93 if destLayer is None:
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94 shpimporter.ERROR("No destination layer given!")
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95 return -1
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96
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97 count = srcLayer.GetFeatureCount()
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98 shpimporter.DEBUG("Try to add %i features to database." % count)
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99
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100 srcLayer.ResetReading()
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101
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102 geomType = -1
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103 success = 0
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104 unsupported = 0
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105 creationFailed = 0
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106 featureDef = destLayer.GetLayerDefn()
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107
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108 for feat in srcLayer:
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109 geom = feat.GetGeometryRef()
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110
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111 if geom is None:
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112 continue
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113
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114 geomType = geom.GetGeometryType()
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115
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116 if self.isGeometryValid(geomType):
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117 newFeat = self.createNewFeature(featureDef,
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118 feat,
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119 name=name,
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120 path=path)
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121
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122 if newFeat is not None:
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123 newFeat.SetField("path", path)
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124 newFeat = self.transform(newFeat)
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125 res = destLayer.CreateFeature(newFeat)
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126 if res is None or res > 0:
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127 shpimporter.ERROR("Unable to insert feature: %r" % res)
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128 else:
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129 success = success + 1
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130 else:
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131 creationFailed = creationFailed + 1
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132 else:
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133 unsupported = unsupported + 1
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134
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135 shpimporter.INFO("Inserted %i features" % success)
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parents: 3654
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136 shpimporter.INFO("Failed to create %i features" % creationFailed)
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parents: 3654
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137 shpimporter.INFO("Found %i unsupported features" % unsupported)
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138
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139 try:
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140 if self.config.dry_run > 0:
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141 return geomType
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142 destLayer.CommitTransaction()
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143 except e:
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parents: 3654
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144 shpimporter.ERROR("Exception while committing transaction.")
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145
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146 return geomType
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147
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