Finding historical GIS data can be hard to find. Listed here are available sites that offer historical country data in GIS file formats for download.
Sheila Steffenson discusses how the Arizona Department of Transport will be able to validate and integrate its own road network information with regular updates from multiple contributing government bodies within the state using 1Spatial technology.
Focused on providing satellite imagery for large-scaled natural disasters, the Open Data program will provide open and accurate high-resolution satellite imagery and crowdsourced GIS layers.
Similar to the semantic web, techniques have been created for GIS, where finding and applying geospatial data requires protocols and standards that allow the large variety of data to be more easily searched.