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 [...]
Also tagged cartogram, choropleth, code, dot density, geojson, isolines, javascript, library, NACIS, noncontiguous cartogram, openlayers, projections, proportional symbol, symbology, thematic mapping
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Classification is commonplace in thematic cartography. In choropleth mapping, classification is the norm. This was not always so. The first choropleth map (created by Baron Charles Dupin in 1826) was unclassed.
According to Arthur Robinson, in his Early Thematic Mapping in the History of Cartography:
So far as we now know, the [...]