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GridLinear.py
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GridLinear.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
GridLinear.py
---------------------
Date : September 2017
Copyright : (C) 2017 by Alexander Bruy
Email : alexander dot bruy at gmail dot com
***************************************************************************
* *
* 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__ = 'Alexander Bruy'
__date__ = 'September 2017'
__copyright__ = '(C) 2017, Alexander Bruy'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
from qgis.PyQt.QtGui import QIcon
from qgis.core import (QgsRasterFileWriter,
QgsProcessing,
QgsProcessingParameterDefinition,
QgsProcessingParameterFeatureSource,
QgsProcessingParameterEnum,
QgsProcessingParameterField,
QgsProcessingParameterNumber,
QgsProcessingParameterString,
QgsProcessingParameterRasterDestination)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.algs.gdal.GdalUtils import GdalUtils
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
class GridLinear(GdalAlgorithm):
INPUT = 'INPUT'
Z_FIELD = 'Z_FIELD'
RADIUS = 'RADIUS'
NODATA = 'NODATA'
OPTIONS = 'OPTIONS'
DATA_TYPE = 'DATA_TYPE'
OUTPUT = 'OUTPUT'
TYPES = ['Byte', 'Int16', 'UInt16', 'UInt32', 'Int32', 'Float32', 'Float64', 'CInt16', 'CInt32', 'CFloat32', 'CFloat64']
def __init__(self):
super().__init__()
def initAlgorithm(self, config=None):
self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
self.tr('Point layer'),
[QgsProcessing.TypeVectorPoint]))
z_field_param = QgsProcessingParameterField(self.Z_FIELD,
self.tr('Z value from field'),
None,
self.INPUT,
QgsProcessingParameterField.Numeric,
optional=True)
z_field_param.setFlags(z_field_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(z_field_param)
self.addParameter(QgsProcessingParameterNumber(self.RADIUS,
self.tr('Search distance '),
type=QgsProcessingParameterNumber.Double,
minValue=-1.0,
defaultValue=-1.0))
self.addParameter(QgsProcessingParameterNumber(self.NODATA,
self.tr('NODATA marker to fill empty points'),
type=QgsProcessingParameterNumber.Double,
defaultValue=0.0))
options_param = QgsProcessingParameterString(self.OPTIONS,
self.tr('Additional creation options'),
defaultValue='',
optional=True)
options_param.setFlags(options_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
options_param.setMetadata({
'widget_wrapper': {
'class': 'processing.algs.gdal.ui.RasterOptionsWidget.RasterOptionsWidgetWrapper'}})
self.addParameter(options_param)
dataType_param = QgsProcessingParameterEnum(self.DATA_TYPE,
self.tr('Output data type'),
self.TYPES,
allowMultiple=False,
defaultValue=5)
dataType_param.setFlags(dataType_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(dataType_param)
self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
self.tr('Interpolated (Linear)')))
def name(self):
return 'gridlinear'
def displayName(self):
return self.tr('Grid (Linear)')
def group(self):
return self.tr('Raster analysis')
def groupId(self):
return 'rasteranalysis'
def icon(self):
return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', 'grid.png'))
def commandName(self):
return 'gdal_grid'
def getConsoleCommands(self, parameters, context, feedback, executing=True):
ogrLayer, layerName = self.getOgrCompatibleSource(self.INPUT, parameters, context, feedback, executing)
arguments = ['-l']
arguments.append(layerName)
fieldName = self.parameterAsString(parameters, self.Z_FIELD, context)
if fieldName:
arguments.append('-zfield')
arguments.append(fieldName)
params = 'linear'
params += ':radius={}'.format(self.parameterAsDouble(parameters, self.RADIUS, context))
params += ':nodata={}'.format(self.parameterAsDouble(parameters, self.NODATA, context))
arguments.append('-a')
arguments.append(params)
arguments.append('-ot')
arguments.append(self.TYPES[self.parameterAsEnum(parameters, self.DATA_TYPE, context)])
out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
self.setOutputValue(self.OUTPUT, out)
arguments.append('-of')
arguments.append(QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1]))
options = self.parameterAsString(parameters, self.OPTIONS, context)
if options:
arguments.extend(GdalUtils.parseCreationOptions(options))
arguments.append(ogrLayer)
arguments.append(out)
return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]