/
Clip.py
261 lines (255 loc) · 11.9 KB
/
Clip.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
from sextante.core.GeoAlgorithm import GeoAlgorithm
import os.path
from PyQt4 import QtGui
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
from sextante.parameters.ParameterVector import ParameterVector
from sextante.core.QGisLayers import QGisLayers
from sextante.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
from sextante.outputs.OutputVector import OutputVector
from sextante.ftools import ftools_utils
from sextante.core.SextanteLog import SextanteLog
from sextante.parameters.ParameterBoolean import ParameterBoolean
class Clip(GeoAlgorithm):
INPUT = "INPUT"
INPUT2 = "INPUT2"
OUTPUT = "OUTPUT"
USE_SELECTED = "USE_SELECTED"
USE_SELECTED2 = "USE_SELECTED2"
def getIcon(self):
return QtGui.QIcon(os.path.dirname(__file__) + "/icons/clip.png")
def processAlgorithm(self, progress):
settings = QSettings()
systemEncoding = settings.value( "/UI/encoding", "System" ).toString()
output = self.getOutputValue(Clip.OUTPUT)
useSelection = self.getParameterValue(Clip.USE_SELECTED)
useSelection2 = self.getParameterValue(Clip.USE_SELECTED2)
vlayerA = QGisLayers.getObjectFromUri(self.getParameterValue(Clip.INPUT))
vlayerB = QGisLayers.getObjectFromUri(self.getParameterValue(Clip.INPUT2))
GEOS_EXCEPT = True
FEATURE_EXCEPT = True
vproviderA = self.vlayerA.dataProvider()
allAttrsA = vproviderA.attributeIndexes()
vproviderA.select( allAttrsA )
vproviderB = self.vlayerB.dataProvider()
allAttrsB = vproviderB.attributeIndexes()
vproviderB.select( allAttrsB )
# check for crs compatibility
crsA = vproviderA.crs()
crsB = vproviderB.crs()
if not crsA.isValid() or not crsB.isValid():
SextanteLog.addToLog(SextanteLog.LOG_WARNING, "Intersection. Invalid CRS. Results might be unexpected")
else:
if not crsA != crsB:
SextanteLog.addToLog(SextanteLog.LOG_WARNING, "Intersection. Non-matching CRSs. Results might be unexpected")
fields = vproviderA.fields()
writer = QgsVectorFileWriter( output, systemEncoding,fields, vproviderA.geometryType(), vproviderA.crs() )
inFeatA = QgsFeature()
inFeatB = QgsFeature()
outFeat = QgsFeature()
index = ftools_utils.createIndex( vproviderB )
vproviderA.rewind()
nElement = 0
# there is selection in input layer
if useSelection:
nFeat = vlayerA.selectedFeatureCount()
selectionA = self.vlayerA.selectedFeatures()
# we have selection in overlay layer
if useSelection2:
selectionB = self.vlayerB.selectedFeaturesIds()
for inFeatA in selectionA:
nElement += 1
progress.setPercentage(int(nElement/nFeat * 100))
geom = QgsGeometry( inFeatA.geometry() )
int_geom = QgsGeometry( geom )
atMap = inFeatA.attributeMap()
intersects = index.intersects( geom.boundingBox() )
found = False
first = True
for id in intersects:
if id in selectionB:
vproviderB.featureAtId( int( id ), inFeatB , True, allAttrsB )
tmpGeom = QgsGeometry( inFeatB.geometry() )
if tmpGeom.intersects( geom ):
found = True
if first:
outFeat.setGeometry( QgsGeometry( tmpGeom ) )
first = False
else:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( cur_geom.combine( tmpGeom ) )
outFeat.setGeometry( QgsGeometry( new_geom ) )
except:
GEOS_EXCEPT = False
break
if found:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( geom.intersection( cur_geom ) )
if new_geom.wkbType() == 7:
int_com = QgsGeometry( geom.combine( cur_geom ) )
int_sym = QgsGeometry( geom.symDifference( cur_geom ) )
new_geom = QgsGeometry( int_com.difference( int_sym ) )
try:
outFeat.setGeometry( new_geom )
outFeat.setAttributeMap( atMap )
writer.addFeature( outFeat )
except:
FEAT_EXCEPT = False
continue
except:
GEOS_EXCEPT = False
continue
# we have no selection in overlay layer
else:
for inFeatA in selectionA:
nElement += 1
progress.setPercentage(int(nElement/nFeat * 100))
geom = QgsGeometry( inFeatA.geometry() )
atMap = inFeatA.attributeMap()
intersects = index.intersects( geom.boundingBox() )
found = False
first = True
for id in intersects:
vproviderB.featureAtId( int( id ), inFeatB , True, allAttrsB )
tmpGeom = QgsGeometry( inFeatB.geometry() )
if tmpGeom.intersects( geom ):
found = True
if first:
outFeat.setGeometry( QgsGeometry( tmpGeom ) )
first = False
else:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( cur_geom.combine( tmpGeom ) )
outFeat.setGeometry( QgsGeometry( new_geom ) )
except:
GEOS_EXCEPT = False
break
if found:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( geom.intersection( cur_geom ) )
if new_geom.wkbType() == 7:
int_com = QgsGeometry( geom.combine( cur_geom ) )
int_sym = QgsGeometry( geom.symDifference( cur_geom ) )
new_geom = QgsGeometry( int_com.difference( int_sym ) )
try:
outFeat.setGeometry( new_geom )
outFeat.setAttributeMap( atMap )
writer.addFeature( outFeat )
except:
FEAT_EXCEPT = False
continue
except:
GEOS_EXCEPT = False
continue
# there is no selection in input layer
else:
nFeat = vproviderA.featureCount()
# we have selection in overlay layer
if useSelection2:
selectionB = self.vlayerB.selectedFeaturesIds()
while vproviderA.nextFeature( inFeatA ):
nElement += 1
progress.setPercentage(int(nElement/nFeat * 100))
geom = QgsGeometry( inFeatA.geometry() )
atMap = inFeatA.attributeMap()
intersects = index.intersects( geom.boundingBox() )
found = False
first = True
for id in intersects:
if id in selectionB:
vproviderB.featureAtId( int( id ), inFeatB , True, allAttrsB )
tmpGeom = QgsGeometry( inFeatB.geometry() )
if tmpGeom.intersects( geom ):
found = True
if first:
outFeat.setGeometry( QgsGeometry( tmpGeom ) )
first = False
else:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( cur_geom.combine( tmpGeom ) )
outFeat.setGeometry( QgsGeometry( new_geom ) )
except:
GEOS_EXCEPT = False
break
if found:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( geom.intersection( cur_geom ) )
if new_geom.wkbType() == 7:
int_com = QgsGeometry( geom.combine( cur_geom ) )
int_sym = QgsGeometry( geom.symDifference( cur_geom ) )
new_geom = QgsGeometry( int_com.difference( int_sym ) )
try:
outFeat.setGeometry( new_geom )
outFeat.setAttributeMap( atMap )
writer.addFeature( outFeat )
except:
FEAT_EXCEPT = False
continue
except:
GEOS_EXCEPT = False
continue
# we have no selection in overlay layer
else:
while vproviderA.nextFeature( inFeatA ):
nElement += 1
progress.setPercentage(int(nElement/nFeat * 100))
geom = QgsGeometry( inFeatA.geometry() )
atMap = inFeatA.attributeMap()
intersects = index.intersects( geom.boundingBox() )
first = True
found = False
if len( intersects ) > 0:
for id in intersects:
vproviderB.featureAtId( int( id ), inFeatB , True, allAttrsB )
tmpGeom = QgsGeometry( inFeatB.geometry() )
if tmpGeom.intersects( geom ):
found = True
if first:
outFeat.setGeometry( QgsGeometry( tmpGeom ) )
first = False
else:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( cur_geom.combine( tmpGeom ) )
outFeat.setGeometry( QgsGeometry( new_geom ) )
except:
GEOS_EXCEPT = False
break
if found:
try:
cur_geom = QgsGeometry( outFeat.geometry() )
new_geom = QgsGeometry( geom.intersection( cur_geom ) )
if new_geom.wkbType() == 7:
int_com = QgsGeometry( geom.combine( cur_geom ) )
int_sym = QgsGeometry( geom.symDifference( cur_geom ) )
new_geom = QgsGeometry( int_com.difference( int_sym ) )
try:
outFeat.setGeometry( new_geom )
outFeat.setAttributeMap( atMap )
writer.addFeature( outFeat )
except:
FEAT_EXCEPT = False
continue
except:
GEOS_EXCEPT = False
continue
del writer
if not GEOS_EXCEPT:
SextanteLog.addToLog(SextanteLog.LOG_WARNING, "Geometry exception while computing clip")
if not FEATURE_EXCEPT:
SextanteLog.addToLog(SextanteLog.LOG_WARNING, "Feature exception while computing clip")
def defineCharacteristics(self):
self.name = "Clip"
self.group = "Geoprocessing tools"
self.addParameter(ParameterVector(Clip.INPUT, "Input layer", ParameterVector.VECTOR_TYPE_ANY))
self.addParameter(ParameterVector(Clip.INPUT2, "Clip layer", ParameterVector.VECTOR_TYPE_ANY))
self.addParameter(ParameterBoolean(Clip.USE_SELECTED, "Use selected features (input)", False))
self.addParameter(ParameterBoolean(Clip.USE_SELECTED2, "Use selected features (clip)", False))
self.addOutput(OutputVector(Clip.OUTPUT, "Clipped"))