mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-28 00:17:30 -05:00
134 lines
4.5 KiB
Python
134 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
ExportGeometryInfo.py
|
|
---------------------
|
|
Date : August 2012
|
|
Copyright : (C) 2012 by Victor Olaya
|
|
Email : volayaf 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__ = 'Victor Olaya'
|
|
__date__ = 'August 2012'
|
|
__copyright__ = '(C) 2012, Victor Olaya'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
from PyQt4.QtCore import *
|
|
from qgis.core import *
|
|
from qgis.utils import iface
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.parameters import ParameterSelection
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import dataobjects, vector
|
|
|
|
|
|
class ExportGeometryInfo(GeoAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
METHOD = 'CALC_METHOD'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
CALC_METHODS = ['Layer CRS', 'Project CRS', 'Ellipsoidal']
|
|
|
|
def defineCharacteristics(self):
|
|
self.name = 'Export/Add geometry columns'
|
|
self.group = 'Vector table tools'
|
|
|
|
self.addParameter(ParameterVector(self.INPUT,
|
|
self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_ANY]))
|
|
self.addParameter(ParameterSelection(self.METHOD,
|
|
self.tr('Calculate using'), self.CALC_METHODS, 0))
|
|
|
|
self.addOutput(OutputVector(self.OUTPUT, self.tr('Output layer')))
|
|
|
|
def processAlgorithm(self, progress):
|
|
layer = dataobjects.getObjectFromUri(
|
|
self.getParameterValue(self.INPUT))
|
|
method = self.getParameterValue(self.METHOD)
|
|
|
|
geometryType = layer.geometryType()
|
|
|
|
idx1 = -1
|
|
idx2 = -1
|
|
fields = layer.pendingFields()
|
|
|
|
if geometryType == QGis.Polygon:
|
|
(idx1, fields) = vector.findOrCreateField(layer, fields, 'area',
|
|
21, 6)
|
|
(idx2, fields) = vector.findOrCreateField(layer, fields,
|
|
'perimeter', 21, 6)
|
|
elif geometryType == QGis.Line:
|
|
(idx1, fields) = vector.findOrCreateField(layer, fields, 'length',
|
|
21, 6)
|
|
idx2 = idx1
|
|
else:
|
|
(idx1, fields) = vector.findOrCreateField(layer, fields, 'xcoord',
|
|
21, 6)
|
|
(idx2, fields) = vector.findOrCreateField(layer, fields, 'ycoord',
|
|
21, 6)
|
|
|
|
writer = self.getOutputFromName(
|
|
self.OUTPUT).getVectorWriter(fields.toList(),
|
|
layer.dataProvider().geometryType(), layer.crs())
|
|
|
|
ellips = None
|
|
crs = None
|
|
coordTransform = None
|
|
|
|
# Calculate with:
|
|
# 0 - layer CRS
|
|
# 1 - project CRS
|
|
# 2 - ellipsoidal
|
|
|
|
if method == 2:
|
|
ellips = QgsProject.instance().readEntry('Measure', '/Ellipsoid',
|
|
'NONE')[0]
|
|
crs = layer.crs().srsid()
|
|
elif method == 1:
|
|
mapCRS = iface.mapCanvas().mapRenderer().destinationCrs()
|
|
layCRS = layer.crs()
|
|
coordTransform = QgsCoordinateTransform(layCRS, mapCRS)
|
|
|
|
outFeat = QgsFeature()
|
|
inGeom = QgsGeometry()
|
|
|
|
outFeat.initAttributes(len(fields))
|
|
outFeat.setFields(fields)
|
|
|
|
current = 0
|
|
features = vector.features(layer)
|
|
total = 100.0 / float(len(features))
|
|
for f in features:
|
|
inGeom = f.geometry()
|
|
|
|
if method == 1:
|
|
inGeom.transform(coordTransform)
|
|
|
|
(attr1, attr2) = vector.simpleMeasure(inGeom, method, ellips, crs)
|
|
|
|
outFeat.setGeometry(inGeom)
|
|
attrs = f.attributes()
|
|
attrs.insert(idx1, attr1)
|
|
if attr2 is not None:
|
|
attrs.insert(idx2, attr2)
|
|
outFeat.setAttributes(attrs)
|
|
writer.addFeature(outFeat)
|
|
|
|
current += 1
|
|
progress.setPercentage(int(current * total))
|
|
|
|
del writer
|