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146 lines
6.3 KiB
Python
146 lines
6.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ogr2ogrdissolve.py
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---------------------
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Date : Janaury 2015
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Copyright : (C) 2015 by Giovanni Manghi
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Email : giovanni dot manghi at naturalgis dot pt
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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__ = 'Giovanni Manghi'
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__date__ = 'January 2015'
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__copyright__ = '(C) 2015, Giovanni Manghi'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterString
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from processing.core.parameters import ParameterNumber
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from processing.core.parameters import ParameterBoolean
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from processing.core.parameters import ParameterTableField
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from processing.core.outputs import OutputVector
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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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from processing.tools.system import isWindows
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from processing.tools.vector import ogrConnectionString, ogrLayerName
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class Ogr2OgrDissolve(GdalAlgorithm):
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OUTPUT_LAYER = 'OUTPUT_LAYER'
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INPUT_LAYER = 'INPUT_LAYER'
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GEOMETRY = 'GEOMETRY'
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FIELD = 'FIELD'
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MULTI = 'MULTI'
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COUNT = 'COUNT'
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STATS = 'STATS'
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STATSATT = 'STATSATT'
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AREA = 'AREA'
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FIELDS = 'FIELDS'
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OPTIONS = 'OPTIONS'
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def defineCharacteristics(self):
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self.name, self.i18n_name = self.trAlgorithm('Dissolve polygons')
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self.group, self.i18n_group = self.trAlgorithm('[OGR] Geoprocessing')
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self.addParameter(ParameterVector(self.INPUT_LAYER,
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self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_POLYGON], False))
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self.addParameter(ParameterString(self.GEOMETRY,
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self.tr('Geometry column name ("geometry" for Shapefiles, may be different for other formats)'),
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'geometry', optional=False))
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self.addParameter(ParameterTableField(self.FIELD,
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self.tr('Dissolve field'), self.INPUT_LAYER))
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self.addParameter(ParameterBoolean(self.MULTI,
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self.tr('Output as multipart geometries'), True))
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self.addParameter(ParameterBoolean(self.FIELDS,
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self.tr('Keep input attributes'), False))
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self.addParameter(ParameterBoolean(self.COUNT,
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self.tr('Count dissolved features'), False))
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self.addParameter(ParameterBoolean(self.AREA,
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self.tr('Compute area and perimeter of dissolved features'), False))
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self.addParameter(ParameterBoolean(self.STATS,
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self.tr('Compute min/max/sum/mean for the following numeric attribute'), False))
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self.addParameter(ParameterTableField(self.STATSATT,
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self.tr('Numeric attribute to compute dissolved features stats'), self.INPUT_LAYER, optional=True))
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self.addParameter(ParameterString(self.OPTIONS,
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self.tr('Additional creation options (see ogr2ogr manual)'),
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'', optional=True))
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self.addOutput(OutputVector(self.OUTPUT_LAYER, self.tr('Dissolved')))
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def getConsoleCommands(self):
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inLayer = self.getParameterValue(self.INPUT_LAYER)
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ogrLayer = ogrConnectionString(inLayer)[1:-1]
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layername = "'" + ogrLayerName(inLayer) + "'"
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geometry = unicode(self.getParameterValue(self.GEOMETRY))
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field = unicode(self.getParameterValue(self.FIELD))
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statsatt = unicode(self.getParameterValue(self.STATSATT))
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stats = self.getParameterValue(self.STATS)
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area = self.getParameterValue(self.AREA)
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multi = self.getParameterValue(self.MULTI)
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count = self.getParameterValue(self.COUNT)
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fields = self.getParameterValue(self.FIELDS)
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querystart = '-dialect sqlite -sql "SELECT ST_Union(' + geometry + ')'
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queryend = ' FROM ' + layername + ' GROUP BY ' + field + '"'
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if fields:
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queryfields = ",*"
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else:
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queryfields = "," + field
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if count:
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querycount = ", COUNT(" + geometry + ") AS count"
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else:
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querycount = ""
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if stats:
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querystats = ", SUM(" + statsatt + ") AS sum_diss, MIN(" + statsatt + ") AS min_diss, MAX(" + statsatt + ") AS max_diss, AVG(" + statsatt + ") AS avg_diss"
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else:
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querystats = ""
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if area:
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queryarea = ", SUM(ST_area(" + geometry + ")) AS area_diss, ST_perimeter(ST_union(" + geometry + ")) AS peri_diss"
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else:
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queryarea = ""
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query = querystart + queryfields + querycount + querystats + queryarea + queryend
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output = self.getOutputFromName(self.OUTPUT_LAYER)
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outFile = output.value
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output = ogrConnectionString(outFile)
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options = unicode(self.getParameterValue(self.OPTIONS))
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arguments = []
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arguments.append(output)
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arguments.append(ogrLayer)
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arguments.append(ogrLayerName(inLayer))
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arguments.append(query)
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if not multi:
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arguments.append('-explodecollections')
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if len(options) > 0:
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arguments.append(options)
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commands = []
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if isWindows():
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commands = ['cmd.exe', '/C ', 'ogr2ogr.exe',
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GdalUtils.escapeAndJoin(arguments)]
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else:
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commands = ['ogr2ogr', GdalUtils.escapeAndJoin(arguments)]
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return commands
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def commandName(self):
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return "ogr2ogr"
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