Abast i mida, dos problemes del GIS <a href="http://blog.geoiq.com/2011/06/07/the-challenges-of-scope-and-scale-that-face-gis/">http://blog.geoiq.com/2011/06/07/the-challenges-of-scope-and-scale-that-face-gis/</a><br><br>Raf<br>