|
Cartography - Wikipedia, the free encyclopedia (2366 words) |
 | Spatial data is acquired from measurement and can be stored in a database, from which it can be extracted for a variety of purposes. |
| The advent of magnetic devices, such as the compass and much later magnetic storage devices, allowed for the creation of far more accurate maps and the ability to store and manipulate them digitally. |
| UNEP/GRID-Arendal Maps and Graphics Library, web-site from the UN Environment Programme with hundreds of examples of thematic maps |
| ODLIS: Online Dictionary for Library and Information Science (9826 words) |
| Digital data represented as a cellular grid matrix composed of rows and columns (a raster) representing space as a continuum (example: a digitally scanned image or photograph). |
| A digital elevation model (DEM) is a raster data set of elevation values derived from a printed topographic map (click here to see an example). |
| A digital storage medium capable of being read but not modified or erased, used for data that is to be retained permanently, for example, ROM (read-only memory) and CD-ROM. |
Feeds |
Contact