you can do this if you make your own map. for those who don’t want to make their own map, i’ve added a semi-transparent version of the iNat heatmap layer to my iNat map page: https://jumear.github.io/stirfry/iNat_map.html.
that said, i think iNat’s heatmap implementation results in a visualization that can be misleading and not super useful at times. for example, here’s all observations over Houston:
a lot of the area shows up as red, but there’s actually a lot of variation in the red. just to show what i mean, here’s a different kind of visualization over the same area that gives a better idea of the variation observation density (from https://jumear.github.io/stirfry/iNat_UTFgrid_based_density_map_for_Leaflet.html?defaultstyle=gradient):
(in this second screenshot, you have a much better idea of where there are larger populations of wealthier Houstonians – and also where there are more iNat observations.)
that second screenshot provides a view of the data that’s similar to what you could get from the Explore page, but the Explore page switches to pins at a certain zoom level, and even if you make your own custom map, the grid tile layer also starts to suffer from some of the issues that heatmap does at more granular zoom levels, too. but it’s probably more useful than the heatmap view for this particular use case:
