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2. List of GIS data sources - Wikipedia

   en.wikipedia.org/wiki/List_of_GIS_data_sources

   Online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download. NPScape United States Department of the Interior National Park Service NPScape is a landscape dynamics monitoring project that provides landscape-level data, tools, and evaluations for ...

3. Wikipedia:Obtaining geographic coordinates - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Obtaining...

   The purpose of the project is to aggregate and make digital maps and related GIS data available for free. Licensing: CC-BY-SA 2.0 GPSies.com: Google Maps tool: Gives coordinates for places, names, elevation/height above sea level on Google Maps (reverse geocoding).

4. Google Earth - Wikipedia

   en.wikipedia.org/wiki/Google_Earth

   Google Earth is a web and computer program that renders a 3D representation of Earth based primarily on satellite imagery.The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.

5. Geographic information system - Wikipedia

   en.wikipedia.org/wiki/Geographic_Information_System

   GIS data acquisition includes several methods for gathering spatial data into a GIS database, which can be grouped into three categories: primary data capture, the direct measurement phenomena in the field (e.g., remote sensing, the global positioning system); secondary data capture, the extraction of information from existing sources that are ...

6. Vector Map - Wikipedia

   en.wikipedia.org/wiki/Vector_map

   The Vector Map (VMAP), also called Vector Smart Map, is a vector-based collection of geographic information system (GIS) data about Earth at various levels of detail. Level 0 (low resolution) coverage is global and entirely in the public domain. Level 1 (global coverage at medium resolution) is only partly in the public domain.

7. OpenStreetMap - Wikipedia

   en.wikipedia.org/wiki/OpenStreetMap

   OpenStreetMap (abbreviated OSM) is a free, open map database updated and maintained by a community of volunteers via open collaboration. [4] Contributors collect data from surveys, trace from aerial photo imagery or satellite imagery, and import from other freely licensed geodata sources.

8. Generic Mapping Tools - Wikipedia

   en.wikipedia.org/wiki/Generic_Mapping_Tools

   The software stores 2-D grids as COARDS-compliant netCDF files and comes with a comprehensive collection of free GIS data, such as coast lines, rivers, political borders and coordinates of other geographic objects. Users convert further data (like satellite imagery and digital elevation models) from other sources and

9. Geographic information system software - Wikipedia

   en.wikipedia.org/wiki/Geographic_information...

   A GIS software program is a computer program to support the use of a geographic information system, providing the ability to create, store, manage, query, analyze, and visualize geographic data, that is, data representing phenomena for which location is important.