posts tagged 'isolines'

introducing OpenLayers Symbology

a JavaScript library for thematic mapping in OpenLayers

At last October’s NACIS Practical Cartography Day I gave a very sweaty presentation that was later described as bewildering and incoherent.  I had always meant to partially redeem myself by packaging and cleaning up the code that formed the basis of that talk.  And here it is!
OL-Symbology is [...]

isolining package for ActionScript 3

A week or so back I wrote about a package I ported/modified to create the Delaunay triangulation in Flash with a few AS3 classes. As I noted there, such a triangulated irregular network (TIN) allows us to interpolate isolines — lines of constant value (aka isarithms, commonly called contours).
So, given a field of points [...]