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"""
***************************************************************************
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"
import os
from qgis.PyQt.QtGui import QIcon
from qgis.core import (
QgsRasterFileWriter,
QgsProcessing,
QgsProcessingException,
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"
EXTRA = "EXTRA"
DATA_TYPE = "DATA_TYPE"
OUTPUT = "OUTPUT"
TYPES = [
"Byte",
"Int16",
"UInt16",
"UInt32",
"Int32",
"Float32",
"Float64",
"CInt16",
"CInt32",
"CFloat32",
"CFloat64",
"Int8",
]
def __init__(self):
super().__init__()
def initAlgorithm(self, config=None):
self.addParameter(
QgsProcessingParameterFeatureSource(
self.INPUT,
self.tr("Point layer"),
[QgsProcessing.SourceType.TypeVectorPoint],
)
)
z_field_param = QgsProcessingParameterField(
self.Z_FIELD,
self.tr("Z value from field"),
None,
self.INPUT,
QgsProcessingParameterField.DataType.Numeric,
optional=True,
)
z_field_param.setFlags(
z_field_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
self.addParameter(z_field_param)
self.addParameter(
QgsProcessingParameterNumber(
self.RADIUS,
self.tr("Search distance "),
type=QgsProcessingParameterNumber.Type.Double,
minValue=-1.0,
defaultValue=-1.0,
)
)
self.addParameter(
QgsProcessingParameterNumber(
self.NODATA,
self.tr("NODATA marker to fill empty points"),
type=QgsProcessingParameterNumber.Type.Double,
defaultValue=0.0,
)
)
options_param = QgsProcessingParameterString(
self.OPTIONS,
self.tr("Additional creation options"),
defaultValue="",
optional=True,
)
options_param.setFlags(
options_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
options_param.setMetadata({"widget_wrapper": {"widget_type": "rasteroptions"}})
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.Flag.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.Flag.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):
input_details = self.getOgrCompatibleSource(
self.INPUT, parameters, context, feedback, executing
)
arguments = ["-l", input_details.layer_name]
fieldName = self.parameterAsString(parameters, self.Z_FIELD, context)
if fieldName:
arguments.append("-zfield")
arguments.append(fieldName)
params = "linear"
params += f":radius={self.parameterAsDouble(parameters, self.RADIUS, context)}"
params += f":nodata={self.parameterAsDouble(parameters, self.NODATA, context)}"
arguments.append("-a")
arguments.append(params)
data_type = self.parameterAsEnum(parameters, self.DATA_TYPE, context)
if self.TYPES[data_type] == "Int8" and GdalUtils.version() < 3070000:
raise QgsProcessingException(
self.tr("Int8 data type requires GDAL version 3.7 or later")
)
arguments.append("-ot " + self.TYPES[data_type])
out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
self.setOutputValue(self.OUTPUT, out)
output_format = QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1])
if not output_format:
raise QgsProcessingException(self.tr("Output format is invalid"))
arguments.append("-of")
arguments.append(output_format)
if input_details.open_options:
if GdalUtils.version() < 3070000:
raise QgsProcessingException(
self.tr(
"Open options are not supported by gdal_grid version {} (requires GDAL version 3.7 or later)"
).format(GdalUtils.readableVersion())
)
arguments.extend(input_details.open_options_as_arguments())
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(input_details.connection_string)
arguments.append(out)
if input_details.credential_options:
arguments.extend(input_details.credential_options_as_arguments())
return [self.commandName(), GdalUtils.escapeAndJoin(arguments)]
|
