Skip to content
Permalink
Browse files

[processing] expose TIN interpolation from interpolation plugin in to…

…olbox
  • Loading branch information
alexbruy committed Oct 19, 2016
1 parent f7575e0 commit 774965c2d4ee1678219c725e279760027c73534f
@@ -165,6 +165,8 @@
from .ReliefAuto import ReliefAuto
from .IdwInterpolationZValue import IdwInterpolationZValue
from .IdwInterpolationAttribute import IdwInterpolationAttribute
from .TinInterpolationZValue import TinInterpolationZValue
from .TinInterpolationAttribute import TinInterpolationAttribute


pluginPath = os.path.normpath(os.path.join(
@@ -224,7 +226,8 @@ def __init__(self):
SingleSidedBuffer(), PointsAlongGeometry(),
Aspect(), Slope(), Ruggedness(), Hillshade(),
ReliefAuto(), IdwInterpolationZValue(),
IdwInterpolationAttribute()
IdwInterpolationAttribute(), TinInterpolationZValue(),
TinInterpolationAttribute()
]

if hasMatplotlib:
@@ -0,0 +1,154 @@
# -*- coding: utf-8 -*-

"""
***************************************************************************
TinInterpolationAttribute.py
---------------------
Date : October 2016
Copyright : (C) 2016 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 2016'
__copyright__ = '(C) 2016, Alexander Bruy'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

from qgis.core import QgsRectangle
from qgis.analysis import (QgsInterpolator,
QgsTINInterpolator,
QgsGridFileWriter
)

from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterTableField
from processing.core.parameters import ParameterSelection
from processing.core.parameters import ParameterNumber
from processing.core.parameters import ParameterExtent
from processing.core.outputs import OutputRaster
from processing.core.outputs import OutputVector
from processing.tools import dataobjects


class TinInterpolationAttribute(GeoAlgorithm):

INPUT_LAYER = 'INPUT_LAYER'
ATTRIBUTE = 'ATTRIBUTE'
LAYER_TYPE = 'LAYER_TYPE'
METHOD = 'METHOD'
COLUMNS = 'COLUMNS'
ROWS = 'ROWS'
CELLSIZE_X = 'CELLSIZE_X'
CELLSIZE_Y = 'CELLSIZE_Y'
EXTENT = 'EXTENT'
OUTPUT_LAYER = 'OUTPUT_LAYER'
TRIANULATION_FILE = 'TRIANULATION_FILE'

def defineCharacteristics(self):
self.name, self.i18n_name = self.trAlgorithm('TIN interpolation (using attribute)')
self.group, self.i18n_group = self.trAlgorithm('Interpolation')

self.TYPES = [self.tr('Points'),
self.tr('Structure lines'),
self.tr('Break lines')
]
self.METHODS = [self.tr('Linear'),
self.tr('Clough-Toucher (cubic)')
]

self.addParameter(ParameterVector(self.INPUT_LAYER,
self.tr('Vector layer')))
self.addParameter(ParameterTableField(self.ATTRIBUTE,
self.tr('Interpolation attribute'),
self.INPUT_LAYER,
ParameterTableField.DATA_TYPE_NUMBER))
self.addParameter(ParameterSelection(self.LAYER_TYPE,
self.tr('Type'),
self.TYPES,
0))
self.addParameter(ParameterSelection(self.METHOD,
self.tr('Interpolation method'),
self.METHODS,
0))
self.addParameter(ParameterNumber(self.COLUMNS,
self.tr('Number of columns'),
0, 10000000, 300))
self.addParameter(ParameterNumber(self.ROWS,
self.tr('Number of rows'),
0, 10000000, 300))
self.addParameter(ParameterNumber(self.CELLSIZE_X,
self.tr('Cellsize X'),
0.0, 999999.000000, 0.0))
self.addParameter(ParameterNumber(self.CELLSIZE_Y,
self.tr('Cellsize Y'),
0.0, 999999.000000, 0.0))
self.addParameter(ParameterExtent(self.EXTENT,
self.tr('Extent')))
self.addOutput(OutputRaster(self.OUTPUT_LAYER,
self.tr('Interpolated')))
self.addOutput(OutputVector(self.TRIANULATION_FILE,
self.tr('Triangulation'),
)) # datatype=dataobjects.TYPE_VECTOR_LINE))

def processAlgorithm(self, progress):
layer = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT_LAYER))
fieldName = self.getParameterValue(self.ATTRIBUTE)
layerType = self.getParameterValue(self.LAYER_TYPE)
method = self.getParameterValue(self.METHOD)
columns = self.getParameterValue(self.COLUMNS)
rows = self.getParameterValue(self.ROWS)
cellsizeX = self.getParameterValue(self.CELLSIZE_X)
cellsizeY = self.getParameterValue(self.CELLSIZE_Y)
extent = self.getParameterValue(self.EXTENT).split(',')
output = self.getOutputValue(self.OUTPUT_LAYER)
triangulation = self.getOutputValue(self.TRIANULATION_FILE)

xMin = float(extent[0])
xMax = float(extent[1])
yMin = float(extent[2])
yMax = float(extent[3])
bbox = QgsRectangle(xMin, yMin, xMax, yMax)

layerData = QgsInterpolator.LayerData()
layerData.vectorLayer = layer
layerData.zCoordInterpolation = False
layerData.interpolationAttribute = layer.dataProvider().fieldNameIndex(fieldName)

if layerType == 0:
layerData.mInputType = QgsInterpolator.POINTS
elif layerType == 1:
layerData.mInputType = QgsInterpolator.STRUCTURE_LINES
else:
layerData.mInputType = QgsInterpolator.BREAK_LINES

if method == 0:
interpolationMethod = QgsTINInterpolator.Linear
else:
interpolationMethod = QgsTINInterpolator.CloughTocher

interpolator = QgsTINInterpolator([layerData], interpolationMethod)
interpolator.setExportTriangulationToFile(True)
interpolator.setTriangulationFilePath(triangulation)

writer = QgsGridFileWriter(interpolator,
output,
bbox,
columns,
rows,
cellsizeX,
cellsizeY)

writer.writeFile()
@@ -0,0 +1,151 @@
# -*- coding: utf-8 -*-

"""
***************************************************************************
TinInterpolationZValue.py
---------------------
Date : October 2016
Copyright : (C) 2016 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 2016'
__copyright__ = '(C) 2016, Alexander Bruy'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

from qgis.core import QgsRectangle, QgsWkbTypes
from qgis.analysis import (QgsInterpolator,
QgsTINInterpolator,
QgsGridFileWriter
)

from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterSelection
from processing.core.parameters import ParameterNumber
from processing.core.parameters import ParameterExtent
from processing.core.outputs import OutputRaster
from processing.core.outputs import OutputVector
from processing.tools import dataobjects


class TinInterpolationZValue(GeoAlgorithm):

INPUT_LAYER = 'INPUT_LAYER'
LAYER_TYPE = 'LAYER_TYPE'
METHOD = 'METHOD'
COLUMNS = 'COLUMNS'
ROWS = 'ROWS'
CELLSIZE_X = 'CELLSIZE_X'
CELLSIZE_Y = 'CELLSIZE_Y'
EXTENT = 'EXTENT'
OUTPUT_LAYER = 'OUTPUT_LAYER'
TRIANULATION_FILE = 'TRIANULATION_FILE'

def defineCharacteristics(self):
self.name, self.i18n_name = self.trAlgorithm('TIN interpolation (using Z-values)')
self.group, self.i18n_group = self.trAlgorithm('Interpolation')

self.TYPES = [self.tr('Points'),
self.tr('Structure lines'),
self.tr('Break lines')
]
self.METHODS = [self.tr('Linear'),
self.tr('Clough-Toucher (cubic)')
]

self.addParameter(ParameterVector(self.INPUT_LAYER,
self.tr('Vector layer')))
self.addParameter(ParameterSelection(self.LAYER_TYPE,
self.tr('Type'),
self.TYPES,
0))
self.addParameter(ParameterSelection(self.METHOD,
self.tr('Interpolation method'),
self.METHODS,
0))
self.addParameter(ParameterNumber(self.COLUMNS,
self.tr('Number of columns'),
0, 10000000, 300))
self.addParameter(ParameterNumber(self.ROWS,
self.tr('Number of rows'),
0, 10000000, 300))
self.addParameter(ParameterNumber(self.CELLSIZE_X,
self.tr('Cellsize X'),
0.0, 999999.000000, 0.0))
self.addParameter(ParameterNumber(self.CELLSIZE_Y,
self.tr('Cellsize Y'),
0.0, 999999.000000, 0.0))
self.addParameter(ParameterExtent(self.EXTENT,
self.tr('Extent')))
self.addOutput(OutputRaster(self.OUTPUT_LAYER,
self.tr('Interpolated')))
self.addOutput(OutputVector(self.TRIANULATION_FILE,
self.tr('Triangulation'),
)) # datatype=dataobjects.TYPE_VECTOR_LINE))

def processAlgorithm(self, progress):
layer = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT_LAYER))
layerType = self.getParameterValue(self.LAYER_TYPE)
method = self.getParameterValue(self.METHOD)
columns = self.getParameterValue(self.COLUMNS)
rows = self.getParameterValue(self.ROWS)
cellsizeX = self.getParameterValue(self.CELLSIZE_X)
cellsizeY = self.getParameterValue(self.CELLSIZE_Y)
extent = self.getParameterValue(self.EXTENT).split(',')
output = self.getOutputValue(self.OUTPUT_LAYER)
triangulation = self.getOutputValue(self.TRIANULATION_FILE)

if not QgsWkbTypes.hasZ(layer.wkbType()):
raise GeoAlgorithmExecutionException(
self.tr('Geometries in input layer does not have Z coordinates.'))

xMin = float(extent[0])
xMax = float(extent[1])
yMin = float(extent[2])
yMax = float(extent[3])
bbox = QgsRectangle(xMin, yMin, xMax, yMax)

layerData = QgsInterpolator.LayerData()
layerData.vectorLayer = layer
layerData.zCoordInterpolation = True
layerData.interpolationAttribute = -1

if layerType == 0:
layerData.mInputType = QgsInterpolator.POINTS
elif layerType == 1:
layerData.mInputType = QgsInterpolator.STRUCTURE_LINES
else:
layerData.mInputType = QgsInterpolator.BREAK_LINES

if method == 0:
interpolationMethod = QgsTINInterpolator.Linear
else:
interpolationMethod = QgsTINInterpolator.CloughTocher

interpolator = QgsTINInterpolator([layerData], interpolationMethod)
interpolator.setExportTriangulationToFile(True)
interpolator.setTriangulationFilePath(triangulation)

writer = QgsGridFileWriter(interpolator,
output,
bbox,
columns,
rows,
cellsizeX,
cellsizeY)

writer.writeFile()

0 comments on commit 774965c

Please sign in to comment.