I've installed Spatialite 2.4 in Ubuntu. I try to convert an osm file into a roads network using this tutorial and make searches on it, but the queries only produce "no column" errors. $ ...
I am new to the web mapping arena. I currently am managing a website and would like to add a mapping portion to it, mostly for some simple viewing and querying of a small number of layers. For ...
I have a sqlite database with a table that has a column for longitude and one for latitude. Is there a way to make this data base 'spatial'?
Given a larger csv (1000+ points) with attributes, I need to do both attrbute and spatial queries on the data. Would it be faster to read the points into an xy feature class, and do the spatial and ...