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[processing] Add algorithm to strip null geometries
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| Original file line number | Diff line number | Diff line change |
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| # -*- coding: utf-8 -*- | ||
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| """ | ||
| *************************************************************************** | ||
| RemoveNullGeometry.py | ||
| -------------- | ||
| Date : October 2016 | ||
| Copyright : (C) 2016 by Nyall Dawson | ||
| Email : nyall dot dawson at gmail dot com | ||
| *************************************************************************** | ||
| * * | ||
| * This program is free software; you can redistribute it and/or modify * | ||
| * it under the terms of the GNU General Public License as published by * | ||
| * the Free Software Foundation; either version 2 of the License, or * | ||
| * (at your option) any later version. * | ||
| * * | ||
| *************************************************************************** | ||
| """ | ||
|
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| __author__ = 'Nyall Dawson' | ||
| __date__ = 'October 2016' | ||
| __copyright__ = '(C) 2016, Nyall Dawson' | ||
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| # This will get replaced with a git SHA1 when you do a git archive323 | ||
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| __revision__ = '$Format:%H$' | ||
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| from processing.core.GeoAlgorithm import GeoAlgorithm | ||
| from processing.core.parameters import ParameterVector | ||
| from processing.core.outputs import OutputVector | ||
| from processing.tools import dataobjects, vector | ||
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| class RemoveNullGeometry(GeoAlgorithm): | ||
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| INPUT_LAYER = 'INPUT_LAYER' | ||
| OUTPUT_LAYER = 'OUTPUT_LAYER' | ||
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| def defineCharacteristics(self): | ||
| self.name, self.i18n_name = self.trAlgorithm('Remove null geometries') | ||
| self.group, self.i18n_group = self.trAlgorithm('Vector selection tools') | ||
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| self.addParameter(ParameterVector(self.INPUT_LAYER, | ||
| self.tr('Input layer'), [dataobjects.TYPE_VECTOR_ANY])) | ||
| self.addOutput(OutputVector(self.OUTPUT_LAYER, self.tr('Removed null geometry'))) | ||
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| def processAlgorithm(self, progress): | ||
| layer = dataobjects.getObjectFromUri( | ||
| self.getParameterValue(self.INPUT_LAYER)) | ||
| writer = self.getOutputFromName( | ||
| self.OUTPUT_LAYER).getVectorWriter( | ||
| layer.fields(), | ||
| layer.wkbType(), | ||
| layer.crs()) | ||
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| features = vector.features(layer) | ||
| total = 100.0 / len(features) | ||
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| for current, input_feature in enumerate(features): | ||
| if input_feature.hasGeometry(): | ||
| writer.addFeature(input_feature) | ||
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| progress.setPercentage(int(current * total)) | ||
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| del writer |
31 changes: 31 additions & 0 deletions
31
python/plugins/processing/tests/testdata/expected/remove_null_polys.gfs
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| <GMLFeatureClassList> | ||
| <GMLFeatureClass> | ||
| <Name>remove_null_polys</Name> | ||
| <ElementPath>remove_null_polys</ElementPath> | ||
| <GeometryType>3</GeometryType> | ||
| <SRSName>EPSG:4326</SRSName> | ||
| <DatasetSpecificInfo> | ||
| <FeatureCount>5</FeatureCount> | ||
| <ExtentXMin>-1.00000</ExtentXMin> | ||
| <ExtentXMax>10.00000</ExtentXMax> | ||
| <ExtentYMin>-3.00000</ExtentYMin> | ||
| <ExtentYMax>6.00000</ExtentYMax> | ||
| </DatasetSpecificInfo> | ||
| <PropertyDefn> | ||
| <Name>name</Name> | ||
| <ElementPath>name</ElementPath> | ||
| <Type>String</Type> | ||
| <Width>5</Width> | ||
| </PropertyDefn> | ||
| <PropertyDefn> | ||
| <Name>intval</Name> | ||
| <ElementPath>intval</ElementPath> | ||
| <Type>Integer</Type> | ||
| </PropertyDefn> | ||
| <PropertyDefn> | ||
| <Name>floatval</Name> | ||
| <ElementPath>floatval</ElementPath> | ||
| <Type>Real</Type> | ||
| </PropertyDefn> | ||
| </GMLFeatureClass> | ||
| </GMLFeatureClassList> |
52 changes: 52 additions & 0 deletions
52
python/plugins/processing/tests/testdata/expected/remove_null_polys.gml
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|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| <?xml version="1.0" encoding="utf-8" ?> | ||
| <ogr:FeatureCollection | ||
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| xsi:schemaLocation="" | ||
| xmlns:ogr="http://ogr.maptools.org/" | ||
| xmlns:gml="http://www.opengis.net/gml"> | ||
| <gml:boundedBy> | ||
| <gml:Box> | ||
| <gml:coord><gml:X>-1</gml:X><gml:Y>-3</gml:Y></gml:coord> | ||
| <gml:coord><gml:X>10</gml:X><gml:Y>6</gml:Y></gml:coord> | ||
| </gml:Box> | ||
| </gml:boundedBy> | ||
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| <gml:featureMember> | ||
| <ogr:remove_null_polys fid="polys.0"> | ||
| <ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>-1,-1 -1,3 3,3 3,2 2,2 2,-1 -1,-1</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty> | ||
| <ogr:name>aaaaa</ogr:name> | ||
| <ogr:intval>33</ogr:intval> | ||
| <ogr:floatval>44.123456</ogr:floatval> | ||
| </ogr:remove_null_polys> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:remove_null_polys fid="polys.1"> | ||
| <ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>5,5 6,4 4,4 5,5</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty> | ||
| <ogr:name>Aaaaa</ogr:name> | ||
| <ogr:intval>-33</ogr:intval> | ||
| <ogr:floatval>0</ogr:floatval> | ||
| </ogr:remove_null_polys> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:remove_null_polys fid="polys.2"> | ||
| <ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>2,5 2,6 3,6 3,5 2,5</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty> | ||
| <ogr:name>bbaaa</ogr:name> | ||
| <ogr:floatval>0.123</ogr:floatval> | ||
| </ogr:remove_null_polys> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:remove_null_polys fid="polys.3"> | ||
| <ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>6,1 10,1 10,-3 6,-3 6,1</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs><gml:innerBoundaryIs><gml:LinearRing><gml:coordinates>7,0 7,-2 9,-2 9,0 7,0</gml:coordinates></gml:LinearRing></gml:innerBoundaryIs></gml:Polygon></ogr:geometryProperty> | ||
| <ogr:name>ASDF</ogr:name> | ||
| <ogr:intval>0</ogr:intval> | ||
| </ogr:remove_null_polys> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:remove_null_polys fid="polys.5"> | ||
| <ogr:geometryProperty><gml:Polygon srsName="EPSG:4326"><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>3,2 6,1 6,-3 2,-1 2,2 3,2</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty> | ||
| <ogr:name>elim</ogr:name> | ||
| <ogr:intval>2</ogr:intval> | ||
| <ogr:floatval>3.33</ogr:floatval> | ||
| </ogr:remove_null_polys> | ||
| </gml:featureMember> | ||
| </ogr:FeatureCollection> |
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