Mercurial > dive4elements > river
annotate flys-backend/contrib/shpimporter/importer.py @ 4881:9b03cf6b85c9
(importer) calculate freeboard and expect sql
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Fri, 25 Jan 2013 15:37:43 +0100 |
parents | 82d00b0c7302 |
children | b457532dae63 |
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1 try: |
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2 from osgeo import ogr |
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3 except ImportErrror: |
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4 import ogr |
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5 import osr |
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6 import shpimporter |
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7 import utils |
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8 |
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9 class Importer: |
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10 |
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11 def __init__(self, config, dbconn): |
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12 self.config = config |
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13 self.dbconn = dbconn |
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14 self.river_id = config.river_id |
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15 self.dest_srs = osr.SpatialReference() |
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16 self.dest_srs.ImportFromEPSG(config.target_srs) |
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17 |
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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 |
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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 if feat.GetFieldIndex(name) == -1: |
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32 return False # Avoids an Error in IsFieldSet |
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33 return feat.IsFieldSet(feat.GetFieldIndex(name)) |
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34 |
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35 def IsDoubleFieldSet(self, feat, name): |
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36 try: |
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37 isset = feat.GetFieldAsDouble(name) |
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38 return isset is not None |
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39 except: |
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40 return False |
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41 |
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42 def isShapeRelevant(self, name, path): |
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43 return True |
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44 |
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45 def walkOverShapes(self, shape): |
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46 (name, path) = shape |
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47 if not self.isShapeRelevant(name, path): |
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48 shpimporter.INFO("Skip shapefile '%s'" % path) |
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49 return |
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50 |
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51 shp = ogr.Open(shape[1]) |
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52 if shp is None: |
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53 shpimporter.ERROR("Shapefile '%s' could not be opened!" % path) |
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54 return |
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55 |
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56 shpimporter.INFO("Processing shapefile '%s'" % path) |
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57 srcLayer = shp.GetLayerByName(name) |
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58 |
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59 if srcLayer is None: |
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60 shpimporter.ERROR("Layer '%s' was not found!" % name) |
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61 return |
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62 |
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63 return self.shape2Database(srcLayer, name, path) |
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64 |
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65 def transform(self, feat): |
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66 geometry = feat.GetGeometryRef() |
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67 src_srs = geometry.GetSpatialReference() |
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68 |
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69 if src_srs is None: |
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70 shpimporter.ERROR("No source SRS given! No transformation possible!") |
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71 return feat |
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72 |
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73 transformer = osr.CoordinateTransformation(src_srs, self.dest_srs) |
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74 geometry.Transform(transformer) |
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75 |
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76 return feat |
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77 |
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78 def shape2Database(self, srcLayer, name, path): |
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79 destLayer = self.dbconn.GetLayerByName(self.getTablename()) |
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80 |
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81 if srcLayer is None: |
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82 shpimporter.ERROR("Shapefile is None!") |
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83 return -1 |
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84 |
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85 if destLayer is None: |
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86 shpimporter.ERROR("No destination layer given!") |
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87 return -1 |
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88 |
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89 count = srcLayer.GetFeatureCount() |
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90 shpimporter.DEBUG("Try to add %i features to database." % count) |
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91 |
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92 srcLayer.ResetReading() |
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93 |
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94 geomType = -1 |
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95 success = 0 |
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96 unsupported = 0 |
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97 creationFailed = 0 |
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98 featureDef = destLayer.GetLayerDefn() |
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99 |
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100 for feat in srcLayer: |
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101 geom = feat.GetGeometryRef() |
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102 |
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103 if geom is None: |
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104 shpimporter.DEBUG("Unkown Geometry reference for feature") |
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105 continue |
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106 |
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107 geomType = geom.GetGeometryType() |
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108 |
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109 if self.isGeometryValid(geomType): |
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110 newFeat = self.createNewFeature(featureDef, |
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111 feat, |
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112 name=name, |
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113 path=path) |
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114 |
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115 if newFeat is not None: |
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116 newFeat.SetField("path", utils.getUTF8Path(path)) |
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117 newFeat = self.transform(newFeat) |
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118 res = destLayer.CreateFeature(newFeat) |
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119 if res is None or res > 0: |
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Improve error handling and unify dbconn for all importers
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120 shpimporter.ERROR("Unable to insert feature. Error: %r" % res) |
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121 else: |
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122 success = success + 1 |
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123 else: |
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124 creationFailed = creationFailed + 1 |
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125 else: |
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126 unsupported = unsupported + 1 |
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127 |
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128 shpimporter.INFO("Inserted %i features" % success) |
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129 shpimporter.INFO("Failed to create %i features" % creationFailed) |
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130 shpimporter.INFO("Found %i unsupported features" % unsupported) |
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131 |
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132 try: |
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133 if self.config.dry_run > 0: |
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134 return geomType |
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135 destLayer.CommitTransaction() |
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136 except e: |
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137 shpimporter.ERROR("Exception while committing transaction.") |
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138 |
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139 return geomType |