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160 lines
7.2 KiB
Python
160 lines
7.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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flightlinesToCHM.py
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---------------------
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Date : May 2014
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Copyright : (C) 2014 by Martin Isenburg
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Email : martin near rapidlasso point 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__ = 'Martin Isenburg'
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__date__ = 'May 2014'
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__copyright__ = '(C) 2014, Martin Isenburg'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import os
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from .LAStoolsUtils import LAStoolsUtils
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from .LAStoolsAlgorithm import LAStoolsAlgorithm
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from processing.core.parameters import ParameterSelection
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from processing.core.parameters import ParameterNumber
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from processing.core.parameters import ParameterString
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class flightlinesToCHM(LAStoolsAlgorithm):
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TILE_SIZE = "TILE_SIZE"
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BUFFER = "BUFFER"
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TERRAIN = "TERRAIN"
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TERRAINS = ["wilderness", "nature", "town", "city", "metro"]
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BEAM_WIDTH = "BEAM_WIDTH"
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BASE_NAME = "BASE_NAME"
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def defineCharacteristics(self):
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self.name, self.i18n_name = self.trAlgorithm('flightlinesToCHM')
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self.group, self.i18n_group = self.trAlgorithm('LAStools Pipelines')
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self.addParametersPointInputFolderGUI()
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self.addParameter(ParameterNumber(flightlinesToCHM.TILE_SIZE,
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self.tr("tile size (side length of square tile)"),
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0, None, 1000.0))
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self.addParameter(ParameterNumber(flightlinesToCHM.BUFFER,
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self.tr("buffer around each tile (avoids edge artifacts)"),
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0, None, 25.0))
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self.addParameter(ParameterSelection(flightlinesToCHM.TERRAIN,
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self.tr("terrain type"), flightlinesToCHM.TERRAINS, 1))
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self.addParameter(ParameterNumber(flightlinesToCHM.BEAM_WIDTH,
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self.tr("laser beam width (diameter of laser footprint)"),
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0, None, 0.2))
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self.addParametersStepGUI()
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self.addParametersTemporaryDirectoryGUI()
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self.addParametersOutputDirectoryGUI()
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self.addParameter(ParameterString(flightlinesToCHM.BASE_NAME,
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self.tr("tile base name (using 'sydney' creates sydney_274000_4714000...)"), "tile"))
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self.addParametersRasterOutputFormatGUI()
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self.addParametersCoresGUI()
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self.addParametersVerboseGUI()
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def processAlgorithm(self, progress):
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# first we tile the data
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commands = [os.path.join(LAStoolsUtils.LAStoolsPath(), "bin", "lastile")]
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self.addParametersVerboseCommands(commands)
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self.addParametersPointInputFolderCommands(commands)
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commands.append("-files_are_flightlines")
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tile_size = self.getParameterValue(flightlinesToCHM.TILE_SIZE)
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commands.append("-tile_size")
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commands.append(unicode(tile_size))
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buffer = self.getParameterValue(flightlinesToCHM.BUFFER)
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if buffer != 0.0:
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commands.append("-buffer")
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commands.append(unicode(buffer))
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self.addParametersTemporaryDirectoryAsOutputDirectoryCommands(commands)
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base_name = self.getParameterValue(flightlinesToCHM.BASE_NAME)
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if base_name == "":
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base_name = "tile"
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commands.append("-o")
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commands.append(base_name)
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commands.append("-olaz")
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LAStoolsUtils.runLAStools(commands, progress)
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# then we ground classify the tiles
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commands = [os.path.join(LAStoolsUtils.LAStoolsPath(), "bin", "lasground")]
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self.addParametersVerboseCommands(commands)
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self.addParametersTemporaryDirectoryAsInputFilesCommands(commands, base_name + "*.laz")
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method = self.getParameterValue(flightlinesToCHM.TERRAIN)
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if method != 1:
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commands.append("-" + flightlinesToCHM.TERRAINS[method])
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if method > 2:
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commands.append("-ultra_fine")
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elif method > 1:
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commands.append("-extra_fine")
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elif method > 0:
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commands.append("-fine")
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self.addParametersTemporaryDirectoryAsOutputDirectoryCommands(commands)
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commands.append("-odix")
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commands.append("_g")
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commands.append("-olaz")
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self.addParametersCoresCommands(commands)
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LAStoolsUtils.runLAStools(commands, progress)
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# then we height-normalize the tiles
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commands = [os.path.join(LAStoolsUtils.LAStoolsPath(), "bin", "lasheight")]
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self.addParametersVerboseCommands(commands)
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self.addParametersTemporaryDirectoryAsInputFilesCommands(commands, base_name + "*_g.laz")
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commands.append("-replace_z")
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self.addParametersTemporaryDirectoryAsOutputDirectoryCommands(commands)
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commands.append("-odix")
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commands.append("h")
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commands.append("-olaz")
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self.addParametersCoresCommands(commands)
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LAStoolsUtils.runLAStools(commands, progress)
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# then we thin and splat the tiles
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commands = [os.path.join(LAStoolsUtils.LAStoolsPath(), "bin", "lasthin")]
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self.addParametersVerboseCommands(commands)
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self.addParametersTemporaryDirectoryAsInputFilesCommands(commands, base_name + "*_gh.laz")
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beam_width = self.getParameterValue(flightlinesToCHM.BEAM_WIDTH)
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if beam_width != 0.0:
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commands.append("-subcircle")
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commands.append(unicode(beam_width / 2))
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step = self.getParametersStepValue()
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commands.append("-step")
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commands.append(unicode(step / 4))
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commands.append("-highest")
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self.addParametersTemporaryDirectoryAsOutputDirectoryCommands(commands)
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commands.append("-odix")
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commands.append("t")
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commands.append("-olaz")
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self.addParametersCoresCommands(commands)
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LAStoolsUtils.runLAStools(commands, progress)
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# then we rasterize the classified tiles into CHMs
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commands = [os.path.join(LAStoolsUtils.LAStoolsPath(), "bin", "las2dem")]
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self.addParametersVerboseCommands(commands)
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self.addParametersTemporaryDirectoryAsInputFilesCommands(commands, base_name + "*_ght.laz")
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self.addParametersStepCommands(commands)
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commands.append("-use_tile_bb")
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self.addParametersOutputDirectoryCommands(commands)
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commands.append("-ocut")
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commands.append("4")
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commands.append("-odix")
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commands.append("_chm")
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self.addParametersRasterOutputFormatCommands(commands)
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self.addParametersCoresCommands(commands)
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LAStoolsUtils.runLAStools(commands, progress)
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