Mercurial > dive4elements > river

annotate backend/contrib/shpimporter/utils.py @ 9763:ce7c67445cbb 3.2.x

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No more hacks for getting description in case of official lines In case the name contained one and only one number, that number had been returned as description because in that case, the name matched WQ.NUMBERS_PATTERN.
author Tom Gottfried <tom@intevation.de>
date Fri, 11 Nov 2022 18:12:26 +0100
parents 5aa05a7a34b7
children
rev   line source
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5a654f2e35bc Added a python tool to import shapefiles into database.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
1 import os
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2 import sys
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3 import logging
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4
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174fbaa3d344 Add handling of River Names and remove target_src parameter
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5 try:
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6 from osgeo import ogr
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c5187ab9f571 Fix Syntax Errror
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7 except ImportError:
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8 import ogr
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9
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10 logger = logging.getLogger("utils")
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11
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12 SHP='.shp'
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a6ee62a070b0 I'm learning how to use cursors \o/
Andre Heinecke <aheinecke@intevation.de>
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13 SQL_SELECT_RIVER_ID="SELECT id FROM rivers WHERE name = %s"
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14 SQL_SELECT_RIVER_ID_ORA="SELECT id FROM rivers WHERE name = :s"
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15
5a654f2e35bc Added a python tool to import shapefiles into database.
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16 def findShapefiles(path):
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17 shapes = []
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18
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19 for root, dirs, files in os.walk(path):
5a654f2e35bc Added a python tool to import shapefiles into database.
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20 if len(files) == 0:
5a654f2e35bc Added a python tool to import shapefiles into database.
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21 continue
5a654f2e35bc Added a python tool to import shapefiles into database.
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22
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23 logger.debug("Processing directory '%s' with %i files " % (root, len(files)))
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24
5a654f2e35bc Added a python tool to import shapefiles into database.
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25 for f in files:
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26 idx = f.find(SHP)
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27 if (idx+len(SHP)) == len(f):
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28 shapes.append((f.replace(SHP, ''), root + "/" + f))
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29
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30 return shapes
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31
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32 def getRiverId(dbconn, name, oracle):
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33 """
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34 Returns the id of the river "name"
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35 Dbconn must be a python database connection api compliant object
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36 """
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37 cur = dbconn.cursor()
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38 if oracle:
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39 # This is stupid and shoudl not be neccessary. But I don't
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40 # know how to make it work both ways. aheinecke - 02/2013
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41 stmt = SQL_SELECT_RIVER_ID_ORA
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42 else:
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43 stmt = SQL_SELECT_RIVER_ID
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44 cur.execute(stmt, (getUTF8(name),))
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45 row = cur.fetchone()
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46 if row:
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47 return row[0]
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48 else:
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49 return 0
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50
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51 def getUTF8(string):
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52 """
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53 Tries to convert the string to a UTF-8 encoding by first checking if it
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54 is UTF-8 and then trying cp1252
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55 """
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56 try:
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57 return unicode.encode(unicode(string, "UTF-8"), "UTF-8")
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58 except UnicodeDecodeError:
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59 # Probably European Windows names so lets try again
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60 return unicode.encode(unicode(string, "cp1252"), "UTF-8")
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61
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62 def getUTF8Path(path):
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63 """
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64 Tries to convert path to utf-8 by first checking the filesystemencoding
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65 and trying the default windows encoding afterwards.
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66 Returns a valid UTF-8 encoded unicode object or throws a UnicodeDecodeError
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67 """
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68 try:
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69 return unicode.encode(unicode(path, sys.getfilesystemencoding()), "UTF-8")
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70 except UnicodeDecodeError:
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71 # Probably European Windows names so lets try again
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72 return unicode.encode(unicode(path, "cp1252"), "UTF-8")
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73
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74 WKB_MAP = {
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75 ogr.wkb25Bit : 'wkb25Bit',
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76 ogr.wkbGeometryCollection : 'wkbGeometryCollection',
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77 ogr.wkbGeometryCollection25D :'wkbGeometryCollection25D',
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78 ogr.wkbLineString : 'wkbLineString',
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79 ogr.wkbLineString25D : 'wkbLineString25D',
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80 ogr.wkbLinearRing : 'wkbLinearRing',
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81 ogr.wkbMultiLineString : 'wkbMultiLineString',
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82 ogr.wkbMultiLineString25D : 'wkbMultiLineString25D',
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83 ogr.wkbMultiPoint : 'wkbMultiPoint',
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84 ogr.wkbMultiPoint25D : 'wkbMultiPoint25D',
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85 ogr.wkbMultiPolygon : 'wkbMultiPolygon',
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86 ogr.wkbMultiPolygon25D : 'wkbMultiPolygon25D',
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87 ogr.wkbNDR : 'wkbNDR',
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88 ogr.wkbNone : 'wkbNone',
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89 ogr.wkbPoint : 'wkbPoint',
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90 ogr.wkbPoint25D : 'wkbPoint25D',
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91 ogr.wkbPolygon : 'wkbPolygon',
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92 ogr.wkbPolygon25D : 'wkbPolygon25D',
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93 ogr.wkbUnknown : 'wkbUnknown',
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94 ogr.wkbXDR : 'wkbXDR'
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95 }
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96
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97 def getWkbString(type):
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98 return WKB_MAP.get(type) or "Unknown"
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99
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04eb62eae722 River Axes and HWS_lines are now multiline
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100 def convertToMultiLine(feature):
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101 """
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102 Converts a feature to a multiline feature.
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103 """
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104 geometry = feature.GetGeometryRef()
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105 # SRS information is lost while forcing to multiline
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106 srs = geometry.GetSpatialReference()
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107 geometry = ogr.ForceToMultiLineString(geometry)
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108 geometry.AssignSpatialReference(srs)
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109 feature.SetGeometry(geometry)
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110 return feature
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111
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112 def convertToMultiPolygon(feature):
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113 """
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114 Converts a feature to a multiline feature.
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115 """
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116 geometry = feature.GetGeometryRef()
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117 # SRS information is lost while forcing to multiline
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118 srs = geometry.GetSpatialReference()
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119 geometry = ogr.ForceToMultiPolygon(geometry)
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120 geometry.AssignSpatialReference(srs)
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121 feature.SetGeometry(geometry)
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122 return feature
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