topic Complex geographic analysis in Geoprocessing Questions https://community.esri.com/t5/geoprocessing-questions/complex-geographic-analysis/m-p/167834#M5626 <HTML><HEAD></HEAD><BODY><SPAN>I have a a bunch of polygons representing different ecological niches (combinations of soil and climate type). </SPAN><BR /><SPAN>For each point </SPAN><SPAN style="font-style:italic;">p</SPAN><SPAN> in the map , I want to know how much of each niche </SPAN><SPAN style="font-style:italic;">X</SPAN><SPAN> is within 2000km (call this&nbsp; value&nbsp; </SPAN><SPAN style="font-style:italic;">a(X,p)</SPAN><SPAN> )&nbsp;&nbsp; and whether the niche is present or not within 100 (call this </SPAN><SPAN style="font-style:italic;">b(X,p)</SPAN><SPAN>) .</SPAN><BR /><SPAN>I would like to create a raster where each point's value is equal to </SPAN><BR /><BR /><SPAN>SUM OVER ALL X of&nbsp; ( a(X,p)*b(X,p) )&nbsp;&nbsp; </SPAN><BR /><BR /><SPAN>the idea is: if a plant is able to live in point </SPAN><SPAN style="font-style:italic;">p</SPAN><SPAN>, how likely is it to be able to colonize other ecosystems further away?</SPAN><BR /><BR /><SPAN>Keep in mind that I have about 700 ecosystems so I can't do this by hand.</SPAN><BR /><BR /><SPAN>Thanks a lot!</SPAN></BODY></HTML> Fri, 04 Oct 2013 13:49:38 GMT AndreaMatranga 2013-10-04T13:49:38Z Complex geographic analysis https://community.esri.com/t5/geoprocessing-questions/complex-geographic-analysis/m-p/167834#M5626 <HTML><HEAD></HEAD><BODY><SPAN>I have a a bunch of polygons representing different ecological niches (combinations of soil and climate type). </SPAN><BR /><SPAN>For each point </SPAN><SPAN style="font-style:italic;">p</SPAN><SPAN> in the map , I want to know how much of each niche </SPAN><SPAN style="font-style:italic;">X</SPAN><SPAN> is within 2000km (call this&nbsp; value&nbsp; </SPAN><SPAN style="font-style:italic;">a(X,p)</SPAN><SPAN> )&nbsp;&nbsp; and whether the niche is present or not within 100 (call this </SPAN><SPAN style="font-style:italic;">b(X,p)</SPAN><SPAN>) .</SPAN><BR /><SPAN>I would like to create a raster where each point's value is equal to </SPAN><BR /><BR /><SPAN>SUM OVER ALL X of&nbsp; ( a(X,p)*b(X,p) )&nbsp;&nbsp; </SPAN><BR /><BR /><SPAN>the idea is: if a plant is able to live in point </SPAN><SPAN style="font-style:italic;">p</SPAN><SPAN>, how likely is it to be able to colonize other ecosystems further away?</SPAN><BR /><BR /><SPAN>Keep in mind that I have about 700 ecosystems so I can't do this by hand.</SPAN><BR /><BR /><SPAN>Thanks a lot!</SPAN></BODY></HTML> Fri, 04 Oct 2013 13:49:38 GMT https://community.esri.com/t5/geoprocessing-questions/complex-geographic-analysis/m-p/167834#M5626 AndreaMatranga 2013-10-04T13:49:38Z