Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4872:a563e9f58f93

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Improve error handling and unify dbconn for all importers
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 23 Jan 2013 15:30:09 +0100
parents 890eaa0a5162
children 884afa149192
rev   line source
4872
a563e9f58f93 Improve error handling and unify dbconn for all importers
Andre Heinecke <aheinecke@intevation.de>
parents: 4871
diff changeset
1 try:
a563e9f58f93 Improve error handling and unify dbconn for all importers
Andre Heinecke <aheinecke@intevation.de>
parents: 4871
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2 from osgeo import ogr
a563e9f58f93 Improve error handling and unify dbconn for all importers
Andre Heinecke <aheinecke@intevation.de>
parents: 4871
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3 except ImportErrror:
a563e9f58f93 Improve error handling and unify dbconn for all importers
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parents: 4871
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4 import ogr
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5 import osr
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8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
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parents: 3654
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6 import shpimporter
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7
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8 class Importer:
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9
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parents: 4871
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10 def __init__(self, config, dbconn):
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59ca5dab2782 Shape importer: use python's OptionParse to read user specific configuration from command line.
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11 self.config = config
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a563e9f58f93 Improve error handling and unify dbconn for all importers
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parents: 4871
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12 self.dbconn = dbconn
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parents: 2862
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13 self.river_id = config.river_id
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parents: 2853
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14 self.dest_srs = osr.SpatialReference()
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15 self.dest_srs.ImportFromEPSG(config.target_srs)
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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
bd9e76e0b55d Improved the python shapefile importer.
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20
bd9e76e0b55d Improved the python shapefile importer.
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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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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 destLayer = self.dbconn.GetLayerByName(self.getTablename())
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90
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91 if srcLayer is None:
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92 shpimporter.ERROR("Shapefile is None!")
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93 return -1
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94
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95 if destLayer is None:
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96 shpimporter.ERROR("No destination layer given!")
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97 return -1
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98
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99 count = srcLayer.GetFeatureCount()
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100 shpimporter.DEBUG("Try to add %i features to database." % count)
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101
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102 srcLayer.ResetReading()
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103
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104 geomType = -1
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105 success = 0
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106 unsupported = 0
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107 creationFailed = 0
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108 featureDef = destLayer.GetLayerDefn()
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109
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110 for feat in srcLayer:
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111 geom = feat.GetGeometryRef()
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112
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113 if geom is None:
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114 continue
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115
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116 geomType = geom.GetGeometryType()
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117
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118 if self.isGeometryValid(geomType):
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119 newFeat = self.createNewFeature(featureDef,
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120 feat,
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121 name=name,
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122 path=path)
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123
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124 if newFeat is not None:
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125 newFeat.SetField("path", path)
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126 newFeat = self.transform(newFeat)
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127 res = destLayer.CreateFeature(newFeat)
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128 if res is None or res > 0:
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parents: 4871
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129 shpimporter.ERROR("Unable to insert feature. Error: %r" % res)
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parents:
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130 else:
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131 success = success + 1
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2853
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132 else:
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parents: 2853
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133 creationFailed = creationFailed + 1
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134 else:
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parents:
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135 unsupported = unsupported + 1
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parents:
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136
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
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137 shpimporter.INFO("Inserted %i features" % success)
8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
diff changeset
138 shpimporter.INFO("Failed to create %i features" % creationFailed)
8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
diff changeset
139 shpimporter.INFO("Found %i unsupported features" % unsupported)
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parents:
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140
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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141 try:
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
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142 if self.config.dry_run > 0:
8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
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143 return geomType
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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144 destLayer.CommitTransaction()
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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145 except e:
3655
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
diff changeset
146 shpimporter.ERROR("Exception while committing transaction.")
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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147
bd9e76e0b55d Improved the python shapefile importer.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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148 return geomType
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parents:
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149
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