It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Maps and Geographic Information Systems
Basic information about Maps and Geographic Information Systems (GIS)
This dictionary decodes abbreviations and acronyms found in various publications including maps and websites. These abbreviations or acronyms, therefore, are not necessarily authoritative or standardized in format or content.
