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Hello<br><br>I have a query and I am not sure of the best approach to resolve it.<br><br>I have a data set in spherical global coordinates generated from a geographic input matrix using the calculator function as below:<br><br>(coordsZ*cos(coordsX*3.14159265/180)*cos(coordsY*3.14159265/180))*iHat+(coordsZ*sin(coordsX*3.14159265/180)*cos(coordsY*3.14159265/180))*jHat+(coordsZ*sin(coordsY*3.14159265/180))*kHat<br><br>Wher X=Longitude, Y=Latitude and Z= Earth radius at different depths.<br><br>One point I noticed with this sphere grid is that is defined as an unstructured grid but I am unclear why? The longitudes range from 0-360 and perhaps it expects things in -180/180 format? I generated another sphere grid using the formula above and when it is sliced the spreadsheet shows the lat long values as well as the sphere coordinates: this grid has the normal geographic range on longitudes (-180/180) and is a structured curvilinear grid.<br><br>If I slice the unstructured grid all I get are the sphere coordinates and the values. How can I readily convert these back to geographic?<br><br>Thanks<br><br>Lester<br> </body>
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