I am struggling to find an elegant way to create species richness maps. I thought there would be a rather simple and straightforward method to proceed but I could not find it using a Mac and QGIS -- are any other Mac softwares, if necessary.
I'm using IUCN data available here: http://www.iucnredli...ts/spatial-data
There are about 5,500 species of mammals. I wish to count how many polygons (1 poly = 1 species) are present per square based on, say, a 1 km grid. And then assign colours according to the species density in each square. Simple. But how? Struggle.
Does somebody know how to meet this challenge (challenge, that is, at least for me)?
I would be enormously grateful.