I do pro bono GIS work from time to time, and a recent contribution was towards a local school that was undergoing a capital campaign … Read more
After a lengthy battle in the court system, California’s Supreme Court has finally ruled in favor of allowing public access to the government’s GIS data in Orange County. Back in 2007, the Sierra Club sued the county for the right to use its GIS data for environmental mapping projects. Orange County resisted, however, claiming that the digital maps did not fall under the Public Records Act.
There are two components to GIS data: spatial information (coordinate and projection information for spatial features) and attribute data. Attribute data is information appended in … Read more
Looking for global GIS data? Listed here are free sources for finding GIS data in both vector and raster formats including satellite imagery. Natural Earth … Read more
SDTS stands for Spatial Data Transfer Standard. SDTS was a standard for transferring earth-referenced spatial data across disparate computer programs. The U.S. Geological Survey (USGS) released SDTS … Read more
This article provides a brief overview of the GIS data collection process along with examples of methodologies for GIS data capture. Pre-processing Data in GIS … Read more