mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-27 00:33:48 -05:00
145 lines
6.2 KiB
Python
145 lines
6.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
ogr2ogrdissolve.py
|
|
---------------------
|
|
Date : Janaury 2015
|
|
Copyright : (C) 2015 by Giovanni Manghi
|
|
Email : giovanni dot manghi at naturalgis dot pt
|
|
***************************************************************************
|
|
* *
|
|
* 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. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Giovanni Manghi'
|
|
__date__ = 'January 2015'
|
|
__copyright__ = '(C) 2015, Giovanni Manghi'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.parameters import ParameterString
|
|
from processing.core.parameters import ParameterNumber
|
|
from processing.core.parameters import ParameterBoolean
|
|
from processing.core.parameters import ParameterTableField
|
|
from processing.core.outputs import OutputVector
|
|
|
|
from processing.tools.system import isWindows
|
|
|
|
from processing.algs.gdal.OgrAlgorithm import OgrAlgorithm
|
|
from processing.algs.gdal.GdalUtils import GdalUtils
|
|
|
|
|
|
class Ogr2OgrDissolve(OgrAlgorithm):
|
|
|
|
OUTPUT_LAYER = 'OUTPUT_LAYER'
|
|
INPUT_LAYER = 'INPUT_LAYER'
|
|
GEOMETRY = 'GEOMETRY'
|
|
FIELD = 'FIELD'
|
|
MULTI = 'MULTI'
|
|
COUNT = 'COUNT'
|
|
STATS = 'STATS'
|
|
STATSATT = 'STATSATT'
|
|
AREA = 'AREA'
|
|
FIELDS = 'FIELDS'
|
|
OPTIONS = 'OPTIONS'
|
|
|
|
def defineCharacteristics(self):
|
|
self.name, self.i18n_name = self.trAlgorithm('Dissolve polygons')
|
|
self.group, self.i18n_group = self.trAlgorithm('[OGR] Geoprocessing')
|
|
|
|
self.addParameter(ParameterVector(self.INPUT_LAYER,
|
|
self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_POLYGON], False))
|
|
self.addParameter(ParameterString(self.GEOMETRY,
|
|
self.tr('Geometry column name ("geometry" for Shapefiles, may be different for other formats)'),
|
|
'geometry', optional=False))
|
|
self.addParameter(ParameterTableField(self.FIELD,
|
|
self.tr('Dissolve field'), self.INPUT_LAYER))
|
|
self.addParameter(ParameterBoolean(self.MULTI,
|
|
self.tr('Output as multipart geometries'), True))
|
|
self.addParameter(ParameterBoolean(self.FIELDS,
|
|
self.tr('Keep input attributes'), False))
|
|
self.addParameter(ParameterBoolean(self.COUNT,
|
|
self.tr('Count dissolved features'), False))
|
|
self.addParameter(ParameterBoolean(self.AREA,
|
|
self.tr('Compute area and perimeter of dissolved features'), False))
|
|
self.addParameter(ParameterBoolean(self.STATS,
|
|
self.tr('Compute min/max/sum/mean for the following numeric attribute'), False))
|
|
self.addParameter(ParameterTableField(self.STATSATT,
|
|
self.tr('Numeric attribute to compute dissolved features stats'), self.INPUT_LAYER))
|
|
self.addParameter(ParameterString(self.OPTIONS,
|
|
self.tr('Additional creation options (see ogr2ogr manual)'),
|
|
'', optional=True))
|
|
|
|
self.addOutput(OutputVector(self.OUTPUT_LAYER, self.tr('Dissolved')))
|
|
|
|
def getConsoleCommands(self):
|
|
inLayer = self.getParameterValue(self.INPUT_LAYER)
|
|
ogrLayer = self.ogrConnectionString(inLayer)[1:-1]
|
|
layername = "'" + self.ogrLayerName(inLayer) + "'"
|
|
geometry = unicode(self.getParameterValue(self.GEOMETRY))
|
|
field = unicode(self.getParameterValue(self.FIELD))
|
|
statsatt = unicode(self.getParameterValue(self.STATSATT))
|
|
stats = self.getParameterValue(self.STATS)
|
|
area = self.getParameterValue(self.AREA)
|
|
multi = self.getParameterValue(self.MULTI)
|
|
count = self.getParameterValue(self.COUNT)
|
|
fields = self.getParameterValue(self.FIELDS)
|
|
querystart = '-dialect sqlite -sql "SELECT ST_Union(' + geometry + ')'
|
|
queryend = ' FROM ' + layername + ' GROUP BY ' + field + '"'
|
|
if fields:
|
|
queryfields = ",*"
|
|
else:
|
|
queryfields = "," + field
|
|
if count:
|
|
querycount = ", COUNT(" + geometry + ") AS count"
|
|
else:
|
|
querycount = ""
|
|
if stats:
|
|
querystats = ", SUM(" + statsatt + ") AS sum_diss, MIN(" + statsatt + ") AS min_diss, MAX(" + statsatt + ") AS max_diss, AVG(" + statsatt + ") AS avg_diss"
|
|
else:
|
|
querystats = ""
|
|
if area:
|
|
queryarea = ", SUM(ST_area(" + geometry + ")) AS area_diss, ST_perimeter(ST_union(" + geometry + ")) AS peri_diss"
|
|
else:
|
|
queryarea = ""
|
|
|
|
query = querystart + queryfields + querycount + querystats + queryarea + queryend
|
|
output = self.getOutputFromName(self.OUTPUT_LAYER)
|
|
outFile = output.value
|
|
|
|
output = self.ogrConnectionString(outFile)
|
|
options = unicode(self.getParameterValue(self.OPTIONS))
|
|
|
|
arguments = []
|
|
arguments.append(output)
|
|
arguments.append(ogrLayer)
|
|
arguments.append(self.ogrLayerName(inLayer))
|
|
arguments.append(query)
|
|
|
|
if not multi:
|
|
arguments.append('-explodecollections')
|
|
|
|
if len(options) > 0:
|
|
arguments.append(options)
|
|
|
|
commands = []
|
|
if isWindows():
|
|
commands = ['cmd.exe', '/C ', 'ogr2ogr.exe',
|
|
GdalUtils.escapeAndJoin(arguments)]
|
|
else:
|
|
commands = ['ogr2ogr', GdalUtils.escapeAndJoin(arguments)]
|
|
|
|
return commands
|
|
|
|
def commandName(self):
|
|
return "ogr2ogr"
|