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127 lines
4.2 KiB
Python
127 lines
4.2 KiB
Python
"""
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***************************************************************************
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ClipVectorByExtent.py
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---------------------
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Date : November 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = "Victor Olaya"
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__date__ = "November 2012"
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__copyright__ = "(C) 2012, Victor Olaya"
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from qgis.core import (
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QgsProcessingException,
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QgsProcessingParameterDefinition,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterExtent,
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QgsProcessingParameterString,
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QgsProcessingParameterVectorDestination,
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)
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from processing.algs.gdal.GdalUtils import GdalUtils
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class ClipVectorByExtent(GdalAlgorithm):
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INPUT = "INPUT"
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EXTENT = "EXTENT"
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OPTIONS = "OPTIONS"
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OUTPUT = "OUTPUT"
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def __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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self.addParameter(
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QgsProcessingParameterFeatureSource(self.INPUT, self.tr("Input layer"))
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)
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self.addParameter(
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QgsProcessingParameterExtent(self.EXTENT, self.tr("Clipping extent"))
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)
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options_param = QgsProcessingParameterString(
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self.OPTIONS,
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self.tr("Additional creation options"),
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defaultValue="",
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optional=True,
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)
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options_param.setFlags(
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options_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(options_param)
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self.addParameter(
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QgsProcessingParameterVectorDestination(
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self.OUTPUT, self.tr("Clipped (extent)")
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)
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)
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def name(self):
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return "clipvectorbyextent"
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def displayName(self):
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return self.tr("Clip vector by extent")
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def group(self):
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return self.tr("Vector geoprocessing")
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def groupId(self):
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return "vectorgeoprocessing"
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def commandName(self):
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return "ogr2ogr"
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def getConsoleCommands(self, parameters, context, feedback, executing=True):
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input_details = self.getOgrCompatibleSource(
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self.INPUT, parameters, context, feedback, executing
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)
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source = self.parameterAsSource(parameters, self.INPUT, context)
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if source is None:
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raise QgsProcessingException(
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self.invalidSourceError(parameters, self.INPUT)
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)
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extent = self.parameterAsExtent(
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parameters, self.EXTENT, context, source.sourceCrs()
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)
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options = self.parameterAsString(parameters, self.OPTIONS, context)
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outFile = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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self.setOutputValue(self.OUTPUT, outFile)
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output_details = GdalUtils.gdal_connection_details_from_uri(outFile, context)
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arguments = [
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"-spat",
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str(extent.xMinimum()),
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str(extent.yMaximum()),
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str(extent.xMaximum()),
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str(extent.yMinimum()),
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"-clipsrc spat_extent",
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output_details.connection_string,
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input_details.connection_string,
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input_details.layer_name,
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]
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if input_details.open_options:
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arguments.extend(input_details.open_options_as_arguments())
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if input_details.credential_options:
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arguments.extend(input_details.credential_options_as_arguments())
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if options:
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arguments.append(options)
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if output_details.format:
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arguments.append(f"-f {output_details.format}")
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return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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