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210 lines
8.7 KiB
Python
210 lines
8.7 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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TinInterpolation.py
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---------------------
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Date : October 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__ = 'October 2016'
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__copyright__ = '(C) 2016, Alexander Bruy'
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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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import os
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import (QgsProcessingUtils,
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QgsProcessingParameterDefinition,
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QgsProcessingParameterEnum,
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QgsProcessingParameterNumber,
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QgsProcessingParameterExtent,
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QgsProcessingParameterRasterDestination,
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QgsProcessingParameterFileDestination,
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QgsProcessingException)
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from qgis.analysis import (QgsInterpolator,
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QgsTINInterpolator,
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QgsGridFileWriter)
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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 ParameterInterpolationData(QgsProcessingParameterDefinition):
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def __init__(self, name='', description=''):
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super().__init__(name, description)
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self.setMetadata({
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'widget_wrapper': 'processing.algs.qgis.ui.InterpolationDataWidget.InterpolationDataWidgetWrapper'
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})
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def type(self):
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return 'tin_interpolation_data'
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def clone(self):
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return ParameterInterpolationData(self.name(), self.description())
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@staticmethod
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def parseValue(value):
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if value is None:
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return None
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if value == '':
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return None
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if isinstance(value, str):
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return value if value != '' else None
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else:
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return ParameterInterpolationData.dataToString(value)
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@staticmethod
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def dataToString(data):
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s = ''
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for c in data:
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s += '{}, {}, {:d}, {:d};'.format(c[0],
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c[1],
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c[2],
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c[3])
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return s[:-1]
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class TinInterpolation(QgisAlgorithm):
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INTERPOLATION_DATA = 'INTERPOLATION_DATA'
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METHOD = 'METHOD'
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COLUMNS = 'COLUMNS'
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ROWS = 'ROWS'
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CELLSIZE_X = 'CELLSIZE_X'
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CELLSIZE_Y = 'CELLSIZE_Y'
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EXTENT = 'EXTENT'
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OUTPUT = 'OUTPUT'
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TRIANGULATION_FILE = 'TRIANGULATION_FILE'
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'interpolation.png'))
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def group(self):
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return self.tr('Interpolation')
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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.METHODS = [self.tr('Linear'),
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self.tr('Clough-Toucher (cubic)')
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]
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self.addParameter(ParameterInterpolationData(self.INTERPOLATION_DATA,
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self.tr('Input layer(s)')))
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self.addParameter(QgsProcessingParameterEnum(self.METHOD,
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self.tr('Interpolation method'),
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options=self.METHODS,
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defaultValue=0))
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self.addParameter(QgsProcessingParameterNumber(self.COLUMNS,
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self.tr('Number of columns'),
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minValue=0, maxValue=10000000, defaultValue=300))
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self.addParameter(QgsProcessingParameterNumber(self.ROWS,
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self.tr('Number of rows'),
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minValue=0, maxValue=10000000, defaultValue=300))
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self.addParameter(QgsProcessingParameterNumber(self.CELLSIZE_X,
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self.tr('Cell size X'), type=QgsProcessingParameterNumber.Double,
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minValue=0.0, maxValue=999999.000000, defaultValue=0.0))
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self.addParameter(QgsProcessingParameterNumber(self.CELLSIZE_Y,
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self.tr('Cell size Y'), type=QgsProcessingParameterNumber.Double,
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minValue=0.0, maxValue=999999.000000, defaultValue=0.0))
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self.addParameter(QgsProcessingParameterExtent(self.EXTENT,
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self.tr('Extent'),
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optional=False))
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self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
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self.tr('Interpolated')))
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triangulation_file_param = QgsProcessingParameterFileDestination(self.TRIANGULATION_FILE,
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self.tr('Triangulation'),
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self.tr('SHP files (*.shp)'),
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optional=True)
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triangulation_file_param.setCreateByDefault(False)
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self.addParameter(triangulation_file_param)
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def name(self):
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return 'tininterpolation'
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def displayName(self):
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return self.tr('TIN interpolation')
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def processAlgorithm(self, parameters, context, feedback):
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interpolationData = ParameterInterpolationData.parseValue(parameters[self.INTERPOLATION_DATA])
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method = self.parameterAsEnum(parameters, self.METHOD, context)
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columns = self.parameterAsInt(parameters, self.COLUMNS, context)
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rows = self.parameterAsInt(parameters, self.ROWS, context)
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cellsizeX = self.parameterAsDouble(parameters, self.CELLSIZE_X, context)
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cellsizeY = self.parameterAsDouble(parameters, self.CELLSIZE_Y, context)
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bbox = self.parameterAsExtent(parameters, self.EXTENT, context)
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output = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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triangulation = self.parameterAsFileOutput(parameters, self.TRIANGULATION_FILE, context)
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if interpolationData is None:
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raise QgsProcessingException(
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self.tr('You need to specify at least one input layer.'))
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if cellsizeX == 0.0 or cellsizeY == 0.0:
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raise QgsProcessingException(
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self.tr('Cellsize should be greater than 0.'))
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layerData = []
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layers = []
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for row in interpolationData.split(';'):
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v = row.split(',')
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data = QgsInterpolator.LayerData()
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# need to keep a reference until interpolation is complete
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layer = QgsProcessingUtils.mapLayerFromString(v[0], context)
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data.vectorLayer = layer
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layers.append(layer)
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data.zCoordInterpolation = bool(v[1])
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data.interpolationAttribute = int(v[2])
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if v[3] == '0':
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data.mInputType = QgsInterpolator.POINTS
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elif v[3] == '1':
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data.mInputType = QgsInterpolator.STRUCTURE_LINES
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else:
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data.mInputType = QgsInterpolator.BREAK_LINES
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layerData.append(data)
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if method == 0:
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interpolationMethod = QgsTINInterpolator.Linear
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else:
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interpolationMethod = QgsTINInterpolator.CloughTocher
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interpolator = QgsTINInterpolator(layerData, interpolationMethod, feedback)
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if triangulation is not None and triangulation != '':
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interpolator.setExportTriangulationToFile(True)
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interpolator.setTriangulationFilePath(triangulation)
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writer = QgsGridFileWriter(interpolator,
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output,
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bbox,
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columns,
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rows,
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cellsizeX,
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cellsizeY)
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writer.writeFile(feedback)
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return {self.OUTPUT: output}
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