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2. List of GIS data sources - Wikipedia

   en.wikipedia.org/wiki/List_of_GIS_data_sources

   A comprehensive list of global and regional GIS data sources and geoportals for various themes and purposes. Includes links, descriptions, and categories of data providers and datasets.

3. Geographic information system - Wikipedia

   en.wikipedia.org/wiki/Geographic_Information_System

   Learn about the definition, history, and applications of geographic information systems (GIS), which are integrated computer systems that store, manage, analyze, and visualize geographic data. GIS is a subdiscipline of geography and a branch of technical geography that relies on spatial analysis and location as the key index variable.

4. GIS file format - Wikipedia

   en.wikipedia.org/wiki/GIS_file_format

   Learn about the history, characteristics and examples of various file formats for encoding geographical information in GIS and other geospatial applications. Compare raster and vector formats, open and proprietary formats, and data compression methods.

5. Geographic information system software - Wikipedia

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

   Learn about the history, types, and functions of GIS software, which supports the use of geographic information systems. Compare different products and platforms, such as desktop, server, library, and database GIS.

6. QGIS - Wikipedia

   en.wikipedia.org/wiki/QGIS

   QGIS is a geographic information system (GIS) software that supports viewing, editing, printing, and analysis of geospatial data in various formats. It is written in C++, Python, and Qt, and integrates with other open-source GIS packages and plugins.

7. Internet GIS - Wikipedia

   en.wikipedia.org/wiki/Internet_GIS

   The World Wide Web is an information system that uses the internet to host, share, and distribute documents, images, and other data. [33] Web GIS involves using the World Wide Web to facilitate GIS tasks traditionally done on a desktop computer, as well as enabling the sharing of maps and spatial data. [7]

8. GDAL - Wikipedia

   en.wikipedia.org/wiki/GDAL

   GDAL is a free and open source library that allows reading and writing various raster and vector formats for geospatial data. It is used by many software programs, such as ArcGIS, QGIS, Google Earth, and NASA World Wind Java.

9. Vector Map - Wikipedia

   en.wikipedia.org/wiki/Vector_map

   Vector Map is a vector-based collection of geographic information system (GIS) data about Earth at various levels of detail. Learn about the data sets, levels of resolution, debate about availability, copyrights and tools to read and convert VMAP data.