Add v.lrs.where algorithm

Author: Médéric RIBREUX

python/plugins/processing/algs/grass7/description/v.lrs.where.txt

@@ -0,0 +1,8 @@
+v.lrs.where
+Finds line id and real km+offset for given points in vector map using linear reference system. 
+Vector (v.*)
+ParameterVector|lines|Input vector map containing lines|1|False
+ParameterVector|points|Input vector map containing reference points|0|False
+ParameterTable|rstable|Name of the reference system table|False
+ParameterNumber|thresh|Maximum distance of point to line allowed|0|None|1000|True
+OutputFile|output|LRS Points

python/plugins/processing/algs/grass7/ext/v_lrs_create.py

@@ -41,4 +41,6 @@ def processOutputs(alg):
         rstable
     )
     alg.commands.append(command)
+    command = 'echo \"Integer\",\"Integer\",\"Integer\",\"Real\",\"Real\",\"Real\",\"Real\",\"Real\",\"Real\",\"Real\" > \"{}t\"'.format(rstable)
+    alg.commands.append(command)
     alg.processOutputs()

python/plugins/processing/algs/grass7/ext/v_lrs_where.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    v_lrs_where.py
+    --------------
+    Date                 : March 2016
+    Copyright            : (C) 2016 by Médéric Ribreux
+    Email                : medspx at medspx dot fr
+***************************************************************************
+*                                                                         *
+*   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__ = 'Médéric Ribreux'
+__date__ = 'March 2016'
+__copyright__ = '(C) 2016, Médéric Ribreux'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+
+def processInputs(alg):
+    # We need to import the rstable
+    rstable = alg.getParameterValue('rstable')
+    if rstable in alg.exportedLayers.keys():
+        return
+    alg.exportedLayers[rstable] = alg.getTempFilename()
+    command = 'db.in.ogr input=\"{}\" output={} --overwrite'.format(
+        rstable,
+        alg.exportedLayers[rstable]
+    )
+    alg.commands.append(command)
+    alg.processInputs()
+
+
+def processCommand(alg):
+    command = 'v.lrs.where lines={} points={} rstable={} thresh={} > {} --overwrite'.format(
+        alg.exportedLayers[alg.getParameterValue('lines')],
+        alg.exportedLayers[alg.getParameterValue('points')],
+        alg.exportedLayers[alg.getParameterValue('rstable')],
+        alg.getParameterValue('thresh'),
+        alg.getOutputValue('output')
+    )
+    alg.commands.append(command)