how can i extend ur api?
can u give me some hint?
thanks a lot!

how can i extend ur api?
can u give me some hint?
thanks a lot!

I did want to point out that heat maps are not really a direct implementation of Chorodots; instead maybe an extension. Chorodots were meant to be a compromise between raster and choropleth, such that zero-value areas didn’t need to be colored and, most importantly, that higher density data could fill areas according to their value. Specifically, MacEachren and DiBiase’s implementation outlines that a chorodot cell starts as representing a value of one, but when a region (proxy for the choropleth) reached eight (for orange) or sixty-four (for red) the individual cells were aggregated to the new cell color. Such that seven yellow cells would exist in an area on a map, but that eight would be represented by an orange cell.

As near as I can tell, this doesn’t seem to be an apparent phenomenon in your heat maps. It appears more to be a raster graphic, where zero values are transparent to the base map.

Chorodots were especially designed for showing the expansion behavior of an object, as new values in an animation could be added to a map and subsequently aggregated using that scheme. Where Chorodots failed was also in this sequential aggregation, as widely dispersed phenomenon just show up as a sea of indiscernible yellows. I believe it works best for showing extreme localization in time series, while allowing frame-to-frame comparison of maps. This may have been something that was possibly an initial movement towards minimizing the negative effects present in classified animations.