Mercurial > dive4elements > river

annotate flys-backend/contrib/shpimporter/importer.py @ 4421:0b0f415203f0

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Add new Filter class to change caching Add new Filter class to avoid caching of GWT nocache files in browsers and http proxies. The new Filter class NoCacheFilter sets http headers to stop the proxies and browesers from storing the nocache files.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 06 Nov 2012 13:32:06 +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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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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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
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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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c37effda3655 Added 'path' attribute to each geo relation; adapted the shape importer to set the path for each feature.
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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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82e931f88137 Adapted postgresql spatial schema and fixed a bug in the geo importer.
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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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parents: 2853
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130 else:
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parents: 2853
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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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8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
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parents: 3654
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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)
8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
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parents: 3654
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137 shpimporter.INFO("Found %i unsupported features" % unsupported)
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138
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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139 try:
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parents: 3654
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140 if self.config.dry_run > 0:
8654e4480fc6 Shape importer: added command line option dry_run to supress database transactions.
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parents: 3654
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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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parents:
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145
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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146 return geomType
bd9e76e0b55d Improved the python shapefile importer.
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parents:
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147
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