Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4871:890eaa0a5162

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Add ogr_connection parameter to allow directly setting the ogr connection. This allows the importer to connect with all supported and not just OCI
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 23 Jan 2013 11:51:14 +0100
parents 82e931f88137
children a563e9f58f93
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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2 import shpimporter
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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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parents: 3950
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8 if config.ogr_connection:
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parents: 3950
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9 self.dbconn = '%s' % config.ogr_connection
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parents: 3950
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10 else:
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11 self.dbconn = 'OCI:%s/%s@%s' % (config.user, config.password, config.host)
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12 self.river_id = config.river_id
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parents: 2853
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13 self.dest_srs = osr.SpatialReference()
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14 self.dest_srs.ImportFromEPSG(config.target_srs)
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15
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16
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17 def getKind(self, path):
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18 raise NotImplementedError("Importer.getKind is abstract!")
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19
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20
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21 def getPath(self, base):
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22 raise NotImplementedError("Importer.getPath is abstract!")
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23
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24
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25 def getTablename(self):
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26 raise NotImplementedError("Importer.getTablename is abstract!")
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27
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28
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29 def getName(self):
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30 raise NotImplementedError("Importer.getTablename is abstract!")
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parents: 2862
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31
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32
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33 def IsFieldSet(self, feat, name):
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34 try:
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35 isset = feat.GetField(name)
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36 return isset is not None
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37 except:
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38 return False
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39
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40
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41 def IsDoubleFieldSet(self, feat, name):
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42 try:
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43 isset = feat.GetFieldAsDouble(name)
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44 return isset is not None
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45 except:
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46 return False
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47
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48
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49 def isShapeRelevant(self, name, path):
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50 return True
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51
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52
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53 def walkOverShapes(self, shape):
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54 (name, path) = shape
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55 if not self.isShapeRelevant(name, path):
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parents: 3654
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56 shpimporter.INFO("Skip shapefile '%s'" % path)
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57 return
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58
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59 shp = ogr.Open(shape[1])
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60 if shp is None:
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61 shpimporter.ERROR("Shapefile '%s' could not be opened!" % path)
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62 return
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63
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64 shpimporter.INFO("Processing shapefile '%s'" % path)
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65 srcLayer = shp.GetLayerByName(name)
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66
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67 if srcLayer is None:
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68 shpimporter.ERROR("Layer '%s' was not found!" % name)
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69 return
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70
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71 return self.shape2Database(srcLayer, name, path)
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72
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73
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74 def transform(self, feat):
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75 geometry = feat.GetGeometryRef()
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76 src_srs = geometry.GetSpatialReference()
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77
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78 if src_srs is None:
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79 shpimporter.ERROR("No source SRS given! No transformation possible!")
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80 return feat
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81
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82 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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83 geometry.Transform(transformer)
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84
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85 return feat
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86
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87
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88 def shape2Database(self, srcLayer, name, path):
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89 table = ogr.Open(self.dbconn)
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90 if not table:
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91 shpimporter.ERROR("Could not connect to database %s" % self.dbconn)
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92 return -1
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93
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94 destLayer = table.GetLayerByName(self.getTablename())
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95
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96 if srcLayer is None:
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97 shpimporter.ERROR("Shapefile is None!")
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98 return -1
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99
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100 if destLayer is None:
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101 shpimporter.ERROR("No destination layer given!")
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102 return -1
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103
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104 count = srcLayer.GetFeatureCount()
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105 shpimporter.DEBUG("Try to add %i features to database." % count)
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106
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107 srcLayer.ResetReading()
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108
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109 geomType = -1
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110 success = 0
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111 unsupported = 0
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112 creationFailed = 0
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113 featureDef = destLayer.GetLayerDefn()
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114
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115 for feat in srcLayer:
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116 geom = feat.GetGeometryRef()
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117
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118 if geom is None:
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119 continue
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120
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121 geomType = geom.GetGeometryType()
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122
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123 if self.isGeometryValid(geomType):
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124 newFeat = self.createNewFeature(featureDef,
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125 feat,
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126 name=name,
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127 path=path)
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128
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129 if newFeat is not None:
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130 newFeat.SetField("path", path)
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131 newFeat = self.transform(newFeat)
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132 res = destLayer.CreateFeature(newFeat)
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133 if res is None or res > 0:
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134 shpimporter.ERROR("Unable to insert feature: %r" % res)
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135 else:
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136 success = success + 1
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137 else:
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138 creationFailed = creationFailed + 1
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139 else:
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140 unsupported = unsupported + 1
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141
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142 shpimporter.INFO("Inserted %i features" % success)
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143 shpimporter.INFO("Failed to create %i features" % creationFailed)
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144 shpimporter.INFO("Found %i unsupported features" % unsupported)
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145
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146 try:
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147 if self.config.dry_run > 0:
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148 return geomType
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149 destLayer.CommitTransaction()
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150 except e:
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151 shpimporter.ERROR("Exception while committing transaction.")
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152
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153 return geomType
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154
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