I am using Process Modeller to automate merging several vector layers and then creating a grid to cover the extent of the merged layer. There are functions which already exist which are not listed in the modeller such as :
Vector -> Research Tools -> Vector Grid
MMQGIS -> Create -> Create Grid Layer
The QGIS geoalgorithm Create grid in the modeller is not useful to me as I have to manually determine the position and set the CRS etc beforehand.
Is there any other plugin or function which allows me to accomplish this?
I am now trying to get the Processing plugin (formerly Sextante) to recognise the Vector Grid script. The file is named "doVectorGrid" which I renamed to simply "VectorGrid". I followed this advice: http://planet.qgis.org/planet/tag/sextante/ where it mentions at the bottom how to add your own modified algorithm.
I have added the new terms into the QGISAlgorithmProvider.py (the equilavent to FToolsAlgorithmProvider.py) but I get the following error: ImportError: cannot import name VectorGrid
I'm guessing I have to change the code of the Vector Grid script but I am new to Python. I have copied the ui_frmVectorGrid.py file into the same directory.