El Sábado, 11 de Abril de 2009, Iván Sánchez Ortega escribió: > > I think the way these are done are to use a digital evevation model - > > I would hope the free SRTM could be sufficient? > > On the contrary: AFAIK, SRTM's are done by seeing the differences between > overlapping aerial photos.
I meant "*DTMs* are done by seeing the differences between overlapping aerial photos." -- ---------------------------------- Iván Sánchez Ortega <i...@sanchezortega.es> La realidad es una ilusión causada por falta de ácido.
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