I'm trying to implement a simplified type of dasymetric mapping for census data. I've downloaded the Census's American Community Survey individual-level data and randomly assigned every household to a ...
There is a PostGIS database that has a road network imported from Open Street Map, stored in osm_roads table. For the testing purposes I need to change some road geometry there. I tried to edit it ...
How can I merge/collapse nearby and parallel road lines (eg. a dual-carriageway) into one single line?
I have a shapefile from OSM which contains all the roads within a city. Larger roads (like dual-carriageways) seem to have 2 parallel lines. I'd like to collapse / combine those into 1 line so I can ...
Is there a PostGIS implementation of the Brabyn and Skelly road network travel time model for the New Zealand road network? This model is outlined in: Brabyn L, Skelly C. Modeling population access ...