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GridInverseDistance.py
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GridInverseDistance.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
GridInverseDistance.py
---------------------
Date : October 2013
Copyright : (C) 2013 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__ = 'October 2013'
__copyright__ = '(C) 2013, Alexander Bruy'
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 GridInverseDistance(GdalAlgorithm):
INPUT = 'INPUT'
Z_FIELD = 'Z_FIELD'
POWER = 'POWER'
SMOOTHING = 'SMOOTHING'
RADIUS_1 = 'RADIUS_1'
RADIUS_2 = 'RADIUS_2'
MAX_POINTS = 'MAX_POINTS'
MIN_POINTS = 'MIN_POINTS'
ANGLE = 'ANGLE'
NODATA = 'NODATA'
OPTIONS = 'OPTIONS'
EXTRA = 'EXTRA'
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.POWER,
self.tr('Weighting power'),
type=QgsProcessingParameterNumber.Double,
minValue=0.0,
maxValue=100.0,
defaultValue=2.0))
self.addParameter(QgsProcessingParameterNumber(self.SMOOTHING,
self.tr('Smoothing'),
type=QgsProcessingParameterNumber.Double,
minValue=0.0,
defaultValue=0.0))
self.addParameter(QgsProcessingParameterNumber(self.RADIUS_1,
self.tr('The first radius of search ellipse'),
type=QgsProcessingParameterNumber.Double,
minValue=0.0,
defaultValue=0.0))
self.addParameter(QgsProcessingParameterNumber(self.RADIUS_2,
self.tr('The second radius of search ellipse'),
type=QgsProcessingParameterNumber.Double,
minValue=0.0,
defaultValue=0.0))
self.addParameter(QgsProcessingParameterNumber(self.ANGLE,
self.tr('Angle of search ellipse rotation in degrees (counter clockwise)'),
type=QgsProcessingParameterNumber.Double,
minValue=0.0,
maxValue=360.0,
defaultValue=0.0))
self.addParameter(QgsProcessingParameterNumber(self.MAX_POINTS,
self.tr('Maximum number of data points to use'),
type=QgsProcessingParameterNumber.Integer,
minValue=0,
defaultValue=0))
self.addParameter(QgsProcessingParameterNumber(self.MIN_POINTS,
self.tr('Minimum number of data points to use'),
type=QgsProcessingParameterNumber.Integer,
minValue=0,
defaultValue=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)
extra_param = QgsProcessingParameterString(self.EXTRA,
self.tr('Additional command-line parameters'),
defaultValue=None,
optional=True)
extra_param.setFlags(extra_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(extra_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 (IDW)')))
def name(self):
return 'gridinversedistance'
def displayName(self):
return self.tr('Grid (Inverse distance to a power)')
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',
layerName
]
fieldName = self.parameterAsString(parameters, self.Z_FIELD, context)
if fieldName:
arguments.append('-zfield')
arguments.append(fieldName)
params = 'invdist'
params += ':power={}'.format(self.parameterAsDouble(parameters, self.POWER, context))
params += ':smoothing={}'.format(self.parameterAsDouble(parameters, self.SMOOTHING, context))
params += ':radius1={}'.format(self.parameterAsDouble(parameters, self.RADIUS_1, context))
params += ':radius2={}'.format(self.parameterAsDouble(parameters, self.RADIUS_2, context))
params += ':angle={}'.format(self.parameterAsDouble(parameters, self.ANGLE, context))
params += ':max_points={}'.format(self.parameterAsInt(parameters, self.MAX_POINTS, context))
params += ':min_points={}'.format(self.parameterAsInt(parameters, self.MIN_POINTS, 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))
if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ''):
extra = self.parameterAsString(parameters, self.EXTRA, context)
arguments.append(extra)
arguments.append(ogrLayer)
arguments.append(out)
return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]