I'm interested in calculating for every point the distance to the nearest amenity of each of a certain number of types (train station, supermarket and so on). I think the calculation will be straightforward, but I'm not sure how to visualise the result. A heatmap doesn't seem quite right.
Things I want the visualisation to do:
- No distinction needed between a point that is near 1 supermarket vs near 2 supermarkets
- Show each attribute individually (for maybe 3 attributes)
- Use a step function for distances (eg, 0-499m is one colour, 500-999m is another...)
Is there any standard kind of visualisation for this kind of analysis? My stack is Leaflet, TileMill, PostGIS, OpenStreetMap, comfortable with Python tools but would consider branching out.