Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4877:852d4c508f33

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(importer) Try to convert paths to UTF-8 for DB insertion
author Andre Heinecke <aheinecke@intevation.de>
date Fri, 25 Jan 2013 10:44:58 +0100
parents 884afa149192
children 82d00b0c7302
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
diff changeset
2 from osgeo import ogr
a563e9f58f93 Improve error handling and unify dbconn for all importers
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parents: 4871
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3 except ImportErrror:
a563e9f58f93 Improve error handling and unify dbconn for all importers
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4 import ogr
a563e9f58f93 Improve error handling and unify dbconn for all importers
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5 import osr
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8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 3654
diff changeset
6 import shpimporter
4877
852d4c508f33 (importer) Try to convert paths to UTF-8 for DB insertion
Andre Heinecke <aheinecke@intevation.de>
parents: 4876
diff changeset
7 import utils
2853
bd9e76e0b55d Improved the python shapefile importer.
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8
bd9e76e0b55d Improved the python shapefile importer.
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9 class Importer:
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10
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a563e9f58f93 Improve error handling and unify dbconn for all importers
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parents: 4871
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11 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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parents: 2862
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12 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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13 self.dbconn = dbconn
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parents: 2862
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14 self.river_id = config.river_id
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parents: 2853
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15 self.dest_srs = osr.SpatialReference()
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59ca5dab2782 Shape importer: use python's OptionParse to read user specific configuration from command line.
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parents: 2862
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16 self.dest_srs.ImportFromEPSG(config.target_srs)
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bd9e76e0b55d Improved the python shapefile importer.
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17
bd9e76e0b55d Improved the python shapefile importer.
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18 def getKind(self, path):
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19 raise NotImplementedError("Importer.getKind is abstract!")
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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 def getTablename(self):
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25 raise NotImplementedError("Importer.getTablename is abstract!")
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26
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27 def getName(self):
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28 raise NotImplementedError("Importer.getTablename is abstract!")
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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 def isShapeRelevant(self, name, path):
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46 return True
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47
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48 def walkOverShapes(self, shape):
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49 (name, path) = shape
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50 if not self.isShapeRelevant(name, path):
3655
8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
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parents: 3654
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51 shpimporter.INFO("Skip shapefile '%s'" % path)
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52 return
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53
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54 shp = ogr.Open(shape[1])
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55 if shp is None:
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parents: 3654
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56 shpimporter.ERROR("Shapefile '%s' could not be opened!" % path)
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57 return
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58
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59 shpimporter.INFO("Processing shapefile '%s'" % path)
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60 srcLayer = shp.GetLayerByName(name)
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61
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62 if srcLayer is None:
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parents: 3654
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63 shpimporter.ERROR("Layer '%s' was not found!" % name)
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64 return
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65
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66 return self.shape2Database(srcLayer, name, path)
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67
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parents: 2853
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68 def transform(self, feat):
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69 geometry = feat.GetGeometryRef()
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70 src_srs = geometry.GetSpatialReference()
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71
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72 if src_srs is None:
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2cd2657b3d60 Fixed broken method call in geo importer.
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73 shpimporter.ERROR("No source SRS given! No transformation possible!")
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parents: 2853
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74 return feat
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75
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76 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs)
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77 geometry.Transform(transformer)
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78
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79 return feat
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parents: 2853
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80
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81 def shape2Database(self, srcLayer, name, path):
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82 destLayer = self.dbconn.GetLayerByName(self.getTablename())
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83
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84 if srcLayer is None:
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85 shpimporter.ERROR("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 shpimporter.ERROR("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 shpimporter.DEBUG("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.SetField("path", utils.getUTF8Path(path))
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119 newFeat = self.transform(newFeat)
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120 res = destLayer.CreateFeature(newFeat)
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121 if res is None or res > 0:
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122 shpimporter.ERROR("Unable to insert feature. Error: %r" % res)
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123 else:
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124 success = success + 1
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125 else:
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126 creationFailed = creationFailed + 1
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127 else:
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128 unsupported = unsupported + 1
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129
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130 shpimporter.INFO("Inserted %i features" % success)
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131 shpimporter.INFO("Failed to create %i features" % creationFailed)
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132 shpimporter.INFO("Found %i unsupported features" % unsupported)
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133
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134 try:
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135 if self.config.dry_run > 0:
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136 return geomType
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137 destLayer.CommitTransaction()
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138 except e:
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139 shpimporter.ERROR("Exception while committing transaction.")
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140
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141 return geomType
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