Geographic information system concepts
In order to begin geospatial analysis, it is important to understand some key underlying concepts unique to the field. The list isn't long, but nearly every aspect of analysis traces back to one of these ideas.
As its name suggests, a thematic map portrays a specific theme. A general reference map visually represents features as they relate geographically for navigation or planning. A thematic map goes beyond location to provide the geographic context for information around a central idea. Usually, a thematic map is designed for a targeted audience to answer specific questions. The value of thematic maps lies in what they do not show. A thematic map will use minimal geographic features to avoid ...