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282 lines
9.4 KiB
Python
282 lines
9.4 KiB
Python
"""
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***************************************************************************
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GridNearestNeighbor.py
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---------------------
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Date : October 2013
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Copyright : (C) 2013 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 2013"
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__copyright__ = "(C) 2013, Alexander Bruy"
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import os
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import (
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QgsRasterFileWriter,
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QgsProcessing,
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QgsProcessingException,
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QgsProcessingParameterDefinition,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterEnum,
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QgsProcessingParameterField,
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QgsProcessingParameterNumber,
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QgsProcessingParameterString,
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QgsProcessingParameterRasterDestination,
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)
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from processing.algs.gdal.GdalUtils import GdalUtils
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class GridNearestNeighbor(GdalAlgorithm):
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INPUT = "INPUT"
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Z_FIELD = "Z_FIELD"
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RADIUS_1 = "RADIUS_1"
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RADIUS_2 = "RADIUS_2"
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ANGLE = "ANGLE"
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NODATA = "NODATA"
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OPTIONS = "OPTIONS"
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CREATION_OPTIONS = "CREATION_OPTIONS"
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EXTRA = "EXTRA"
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DATA_TYPE = "DATA_TYPE"
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OUTPUT = "OUTPUT"
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TYPES = [
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"Byte",
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"Int16",
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"UInt16",
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"UInt32",
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"Int32",
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"Float32",
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"Float64",
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"CInt16",
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"CInt32",
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"CFloat32",
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"CFloat64",
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"Int8",
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]
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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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QgsProcessingParameterFeatureSource(
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self.INPUT,
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self.tr("Point layer"),
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[QgsProcessing.SourceType.TypeVectorPoint],
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)
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)
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z_field_param = QgsProcessingParameterField(
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self.Z_FIELD,
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self.tr("Z value from field"),
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None,
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self.INPUT,
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QgsProcessingParameterField.DataType.Numeric,
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optional=True,
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)
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z_field_param.setFlags(
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z_field_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(z_field_param)
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self.addParameter(
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QgsProcessingParameterNumber(
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self.RADIUS_1,
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self.tr("The first radius of search ellipse"),
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type=QgsProcessingParameterNumber.Type.Double,
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minValue=0.0,
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defaultValue=0.0,
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)
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)
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self.addParameter(
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QgsProcessingParameterNumber(
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self.RADIUS_2,
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self.tr("The second radius of search ellipse"),
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type=QgsProcessingParameterNumber.Type.Double,
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minValue=0.0,
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defaultValue=0.0,
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)
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)
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self.addParameter(
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QgsProcessingParameterNumber(
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self.ANGLE,
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self.tr(
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"Angle of search ellipse rotation in degrees (counter clockwise)"
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),
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type=QgsProcessingParameterNumber.Type.Double,
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minValue=0.0,
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maxValue=360.0,
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defaultValue=0.0,
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)
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)
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self.addParameter(
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QgsProcessingParameterNumber(
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self.NODATA,
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self.tr("NODATA marker to fill empty points"),
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type=QgsProcessingParameterNumber.Type.Double,
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defaultValue=0.0,
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)
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)
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# backwards compatibility parameter
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# TODO QGIS 4: remove parameter and related logic
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options_param = QgsProcessingParameterString(
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self.OPTIONS,
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self.tr("Additional creation options"),
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defaultValue="",
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optional=True,
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)
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options_param.setFlags(
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options_param.flags() | QgsProcessingParameterDefinition.Flag.Hidden
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)
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options_param.setMetadata({"widget_wrapper": {"widget_type": "rasteroptions"}})
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self.addParameter(options_param)
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creation_options_param = QgsProcessingParameterString(
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self.CREATION_OPTIONS,
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self.tr("Additional creation options"),
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defaultValue="",
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optional=True,
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)
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creation_options_param.setFlags(
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creation_options_param.flags()
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| QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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creation_options_param.setMetadata(
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{"widget_wrapper": {"widget_type": "rasteroptions"}}
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)
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self.addParameter(creation_options_param)
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extra_param = QgsProcessingParameterString(
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self.EXTRA,
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self.tr("Additional command-line parameters"),
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defaultValue=None,
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optional=True,
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)
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extra_param.setFlags(
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extra_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(extra_param)
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dataType_param = QgsProcessingParameterEnum(
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self.DATA_TYPE,
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self.tr("Output data type"),
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self.TYPES,
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allowMultiple=False,
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defaultValue=5,
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)
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dataType_param.setFlags(
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dataType_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
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)
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self.addParameter(dataType_param)
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self.addParameter(
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QgsProcessingParameterRasterDestination(
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self.OUTPUT, self.tr("Interpolated (Nearest neighbor)")
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)
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)
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def name(self):
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return "gridnearestneighbor"
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def displayName(self):
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return self.tr("Grid (Nearest neighbor)")
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def group(self):
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return self.tr("Raster analysis")
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def groupId(self):
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return "rasteranalysis"
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def icon(self):
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return QIcon(os.path.join(pluginPath, "images", "gdaltools", "grid.png"))
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def commandName(self):
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return "gdal_grid"
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def getConsoleCommands(self, parameters, context, feedback, executing=True):
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input_details = self.getOgrCompatibleSource(
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self.INPUT, parameters, context, feedback, executing
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)
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arguments = ["-l", input_details.layer_name]
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fieldName = self.parameterAsString(parameters, self.Z_FIELD, context)
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if fieldName:
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arguments.append("-zfield")
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arguments.append(fieldName)
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params = "nearest"
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params += (
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f":radius1={self.parameterAsDouble(parameters, self.RADIUS_1, context)}"
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)
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params += (
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f":radius2={self.parameterAsDouble(parameters, self.RADIUS_2, context)}"
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)
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params += f":angle={self.parameterAsDouble(parameters, self.ANGLE, context)}"
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params += f":nodata={self.parameterAsDouble(parameters, self.NODATA, context)}"
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arguments.append("-a")
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arguments.append(params)
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data_type = self.parameterAsEnum(parameters, self.DATA_TYPE, context)
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if self.TYPES[data_type] == "Int8" and GdalUtils.version() < 3070000:
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raise QgsProcessingException(
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self.tr("Int8 data type requires GDAL version 3.7 or later")
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)
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arguments.append("-ot " + self.TYPES[data_type])
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out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
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self.setOutputValue(self.OUTPUT, out)
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output_format = QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1])
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if not output_format:
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raise QgsProcessingException(self.tr("Output format is invalid"))
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arguments.append("-of")
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arguments.append(output_format)
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if input_details.open_options:
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if GdalUtils.version() < 3070000:
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raise QgsProcessingException(
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self.tr(
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"Open options are not supported by gdal_grid version {} (requires GDAL version 3.7 or later)"
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).format(GdalUtils.readableVersion())
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)
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arguments.extend(input_details.open_options_as_arguments())
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options = self.parameterAsString(parameters, self.CREATION_OPTIONS, context)
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# handle backwards compatibility parameter OPTIONS
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if self.OPTIONS in parameters and parameters[self.OPTIONS] not in (None, ""):
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options = self.parameterAsString(parameters, self.OPTIONS, context)
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if options:
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arguments.extend(GdalUtils.parseCreationOptions(options))
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if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ""):
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extra = self.parameterAsString(parameters, self.EXTRA, context)
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arguments.append(extra)
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arguments.append(input_details.connection_string)
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arguments.append(out)
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if input_details.credential_options:
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arguments.extend(input_details.credential_options_as_arguments())
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return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
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