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111 lines
3.5 KiB
Python
111 lines
3.5 KiB
Python
"""
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***************************************************************************
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DefineProjection.py
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---------------------
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Date : January 2016
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Copyright : (C) 2016 by Alexander Bruy
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Email : alexander dot bruy 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__ = "Alexander Bruy"
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__date__ = "January 2016"
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__copyright__ = "(C) 2016, Alexander Bruy"
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import os
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import re
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from qgis.core import (
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QgsProcessing,
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QgsProcessingAlgorithm,
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QgsProcessingParameterVectorLayer,
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QgsProcessingParameterCrs,
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QgsProcessingOutputVectorLayer,
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QgsCoordinateReferenceSystem,
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QgsProjUtils,
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)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class DefineProjection(QgisAlgorithm):
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INPUT = "INPUT"
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CRS = "CRS"
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def group(self):
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return self.tr("Vector general")
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def groupId(self):
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return "vectorgeneral"
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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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QgsProcessingParameterVectorLayer(
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self.INPUT,
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self.tr("Input Shapefile"),
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types=[QgsProcessing.SourceType.TypeVectorAnyGeometry],
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)
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)
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self.addParameter(QgsProcessingParameterCrs(self.CRS, "CRS", "EPSG:4326"))
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self.addOutput(
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QgsProcessingOutputVectorLayer(self.INPUT, self.tr("Layer with projection"))
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)
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def name(self):
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return "definecurrentprojection"
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def displayName(self):
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return self.tr("Define Shapefile projection")
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def tags(self):
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return self.tr("layer,shp,prj,qpj,change,alter").split(",")
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def shortDescription(self):
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return self.tr(
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"Changes a Shapefile's projection to a new CRS without reprojecting features"
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)
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def flags(self):
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return super().flags() | QgsProcessingAlgorithm.Flag.FlagNoThreading
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def processAlgorithm(self, parameters, context, feedback):
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layer = self.parameterAsVectorLayer(parameters, self.INPUT, context)
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crs = self.parameterAsCrs(parameters, self.CRS, context)
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provider = layer.dataProvider()
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ds = provider.dataSourceUri()
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p = re.compile(r"\|.*")
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dsPath = p.sub("", ds)
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if dsPath.lower().endswith(".shp"):
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dsPath = dsPath[:-4]
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wkt = crs.toWkt(QgsCoordinateReferenceSystem.WktVariant.WKT1_ESRI)
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with open(dsPath + ".prj", "w", encoding="utf-8") as f:
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f.write(wkt)
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qpjFile = dsPath + ".qpj"
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if os.path.exists(qpjFile):
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os.remove(qpjFile)
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else:
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feedback.pushConsoleInfo(
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self.tr("Data source isn't a Shapefile, skipping .prj/.qpj creation")
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)
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layer.setCrs(crs)
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layer.triggerRepaint()
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return {self.INPUT: layer}
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