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1
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2
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from gvsig import *
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3
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from geom import *
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4
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5
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def main():
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6
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7
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layer = currentLayer()
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8
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if layer== None:
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9
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msgbox("Selecciona la capa")
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10
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return
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11
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layertype = layer.getTypeVectorLayer()
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12
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if layertype.isSubTypeOf(POINT):
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addToPoint(layer)
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elif layertype.isSubTypeOf(CURVE):
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15
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addToLine(layer)
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elif layertype.isSubTypeOf(SURFACE):
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addToPolygon(layer)
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else:
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msgbox("Tipo de capa no soportado")
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20
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def addToPoint(layer):
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layer.edit()
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schema = layer.getSchema()
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xName=generateUniqColumnName(schema,"X")
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schema.append(xName, "Double", size=15, precision = 3)
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yName=generateUniqColumnName(schema,"Y")
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schema.append(yName, "Double", size=15, precision = 3)
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zName=generateUniqColumnName(schema,"Z")
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schema.append(zName, "Double", size=15, precision = 3)
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layer.updateSchema(schema)
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31
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for feature in layer.features():
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feature.edit()
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point = feature.geometry()
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feature.set(xName,point.getX())
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feature.set(yName,point.getY())
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if point.getDimension()>2:
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feature.set(zName,point.getCoordinateAt(2))
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39
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layer.update(feature)
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40
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layer.commit()
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42
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43
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def addToPolygon(layer):
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layer.edit()
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schema = layer.getSchema()
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areaName=generateUniqColumnName(schema,"Area")
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schema.append(areaName, "Double", size=15, precision = 3)
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perimeterName=generateUniqColumnName(schema,"Perimetro")
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schema.append(perimeterName, "Double", size=15, precision = 3)
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51
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layer.updateSchema(schema)
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53
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54
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for feature in layer.features():
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55
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feature.edit()
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56
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polygon = feature.geometry()
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feature.set(areaName,polygon.area())
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feature.set(perimeterName,polygon.perimeter())
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59
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layer.update(feature)
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61
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def addToLine(layer):
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layer.edit()
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schema = layer.getSchema()
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perimeterName=generateUniqColumnName(schema,"Perimetro")
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schema.append(perimeterName, "Double", size=15, precision = 3)
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67
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layer.updateSchema(schema)
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69
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for feature in layer.features():
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feature.edit()
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72
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line = feature.geometry()
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feature.set(perimeterName,line.perimeter())
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74
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75
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layer.update(feature)
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76
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77
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layer.commit()
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78
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79
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def generateUniqColumnName(schema, name):
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80
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contador = 1
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81
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name2 = name
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82
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while True:
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83
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attr = schema.get(name2)
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84
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if attr == None:
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return name2
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86
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contador += 1
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87
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name2 = "%s%s" % (name , contador)
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88
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