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1answer
53 views

how to calculate area of triangles formed by delaunay triangulation

After applying delaunay triangulation 160 triangles were formed and i need to calculate the area of each triangles. Kindly help us please.
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0answers
115 views

From where can i download WKT files for US zip codes?

From where can i download WKT files for US zip codes ?? i need to plot zip code boundary on a map using open layers
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0answers
32 views

Moving a Google Map Marker on a Mac

I have exact lat & long coordinates that I will enter and hit return in Google maps. When I do this it displays this point with a green marker on the map but I can not move this marker. I want to ...
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0answers
25 views

It is possible to invoke PostGIS internal function within new PostgreSQL user-defined function in C?

I have fuction f() and function ST_Area() for example. Can I invoke ST_Area() in the body of my function f()? Function f() is written in C. The code might look like this: #include "postgres.h" ...
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0answers
68 views

Why doesn't this simple OpenLayers code work?

The problem is that when I create a new shape and add it to the layer and programmatically select the new shape, I cannot unselect that shape using the mouse unless I either click the shape or click a ...
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0answers
129 views

Issues when importing line shapefiles into NetworkX

Note that although I am using Python Console from within QGIS for this, I don't think it's a QGIS issue. Below is the difference of how NetworkX is dealing with 2 line layers created by the same ...