GridAverage.py 8.98 KB
Newer Older
xuebingbing's avatar
xuebingbing committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187
# -*- coding: utf-8 -*-

"""
***************************************************************************
    GridAverage.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 GridAverage(GdalAlgorithm):

    INPUT = 'INPUT'
    Z_FIELD = 'Z_FIELD'
    RADIUS_1 = 'RADIUS_1'
    RADIUS_2 = 'RADIUS_2'
    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.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.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 (moving average)')))

    def name(self):
        return 'gridaverage'

    def displayName(self):
        return self.tr('Grid (Moving average)')

    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 = 'average'
        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 += ':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)]