> The main purpose of the file is to specify an area for which other > specialized programs automatically create digital elevation model or > download surface map from map server. One such program might be > included in future therion (as an xtherion plugin perhaps).
Kind of like 'Therion Earth', nice. I can see why you have started with lat long co-ords now, probably a good move. I thought I might use bbox as a guide when creating terrain models with terraintool to use with Loch, 'Therion Earth' the manual way. It is not absolutely necessary though, as I seem to have managed perfectly well until now. However, using a local epsg co-ordinate system means that the therion user can stick with a consistent system (or at least a number of systems specified by the user) throughout for inputs, and outputs. Currently I think bbox is the only output that goes against this precedent. Bbox is perfectly fine how it is, but maybe as a low priority future addition, add an 'export map' option (for bbox only?) of -coords [<latlong>|cs] with <latlong> being the default and the cs value telling therion to convert to the cs specified in the thconfig file. Bruce
