webgis - w3.ualg.ptw3.ualg.pt/~tpanago/public/webgis.pdf · 898 are Raster layer; since there...
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webgis - w3.ualg.ptw3.ualg.pt/~tpanago/public/webgis.pdf · 898 are Raster layer; since there isinformation for eaCh 'Pixels In the case of data gathered are in a form of points or