Hi all, last week I worked a lot with the TGIS API and PLY to implement the temporal algebra in Python. Therefore I use PLY for lexical analysis of temporal expressions and utilize TGIS methods to evaluate these expressions.I tested the lexer and it seems to work correctly. I tried to build the structure for the temporal algebra and now starts to fill in the required methods. I began with the temporal selection function and implemented an intern map list structure to store generated map lists, derived from temporal expressions, independently from input type (Vector, Raster). Both are in ongoing development.
In the next week I will continue the implementation of the temporal algebra functions. I try to keep track of the temporal algebra. Sometimes it gets complex... but there is and will be progress. Greetings Thomas Link to project wiki page: http://grasswiki.osgeo.org/wiki/GRASS_GSoC_2013_Temporal_GIS_Algebra_for_raster_and_vector_data_in_GRASS Link to project repository: https://code.google.com/p/grass-gis-temporal-algebra/
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