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67 lines
2.7 KiB
Python
67 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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RasterLayerBoundsAlgorithm.py
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---------------------
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Date : January 2013
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Copyright : (C) 2013 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__ = 'January 2013'
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__copyright__ = '(C) 2012, Victor Olaya'
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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.GeoAlgorithm import GeoAlgorithm
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from processing.parameters.ParameterRaster import ParameterRaster
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from processing.outputs.OutputNumber import OutputNumber
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from processing.tools import dataobjects
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from processing.outputs.OutputExtent import OutputExtent
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class RasterLayerBoundsAlgorithm(GeoAlgorithm):
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LAYER = 'LAYER'
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XMIN = 'XMIN'
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XMAX = 'XMAX'
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YMIN = 'YMIN'
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YMAX = 'YMAX'
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EXTENT = 'EXTENT'
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def defineCharacteristics(self):
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self.showInModeler = True
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self.showInToolbox = False
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self.name = 'Raster layer bounds'
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self.group = 'Modeler-only tools'
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self.addParameter(ParameterRaster(self.LAYER, 'Layer'))
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self.addOutput(OutputNumber(self.XMIN, 'min X'))
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self.addOutput(OutputNumber(self.XMAX, 'max X'))
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self.addOutput(OutputNumber(self.YMIN, 'min Y'))
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self.addOutput(OutputNumber(self.YMAX, 'max Y'))
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self.addOutput(OutputExtent(self.EXTENT, 'Extent'))
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def processAlgorithm(self, progress):
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uri = self.getParameterValue(self.LAYER)
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layer = dataobjects.getObjectFromUri(uri)
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self.setOutputValue(self.XMIN, layer.extent().xMinimum())
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self.setOutputValue(self.XMAX, layer.extent().xMaximum())
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self.setOutputValue(self.YMIN, layer.extent().yMinimum())
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self.setOutputValue(self.YMAX, layer.extent().yMaximum())
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self.setOutputValue(self.EXTENT, (layer.extent().xMinimum(),
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layer.extent().xMaximum(),
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layer.extent().yMinimum(),
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layer.extent().yMaximum()))
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