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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:WikiProject Maps - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject_Maps

    Maps are useful in presenting key facts within a geographical context and enabling a descriptive overview of a complex concept to be accessed easily and quickly. WikiProject Maps encourages the creation of free maps and their upload on Wikimedia Commons. On the project's pages can be found advice, tools, links to resources, and map conventions.

  4. Wikipedia : WikiProject Maps/Source materials

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

    Free World Map, GNU maps; Library of Congress Contemporary Maps; Library of Congress historical map collections; TIGER Map Service Creates public domain maps (in GIF format) from U.S. Census Bureau data. U.S. National Atlas Creates public domain maps (in SDTS, E00, Shape and TIFF formats) from U.S. Department of the Interior data.

  5. Shapefile - Wikipedia

    en.wikipedia.org/wiki/Shapefile

    The shapefile format is a digital vector storage format for storing geographic location and associated attribute information. This format lacks the capacity to store topological information. The shapefile format was introduced with ArcView GIS version 2 in the early 1990s. It is now possible to read and write geographical datasets using the ...

  6. World file - Wikipedia

    en.wikipedia.org/wiki/World_file

    The generic meaning of the six parameters in a world file (as defined by Esri [1]) is: Line 1: A: pixel size in the x-direction in map units/pixel; Line 2: D: rotation about y-axis; Line 3: B: rotation about x-axis; Line 4: E: pixel size in the y-direction in map units, almost always negative [b] Line 5: C: x-coordinate of the center of the ...

  7. Wikipedia:Blank maps - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Blank_maps

    Image:BlankMap-World.png – World map, Robinson projection centered on the meridian circa 11°15' to east from the Greenwich Prime Meridian. Microstates and island nations are generally represented by single or few pixels approximate to the capital; all territories indicated in the UN listing of territories and regions are exhibited.

  8. Comparison of GIS vector file formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_GIS_vector...

    National Transfer Format (NTF) – National Transfer Format (mostly used by the UK Ordnance Survey) Shapefile – open, hybrid vector data format using SHP, SHX and DBF files (by ESRI) Spatial Data File – high-performance geodatabase format, native to MapGuide (by Autodesk) TIGER – Topologically Integrated Geographic Encoding and Referencing

  9. OpenStreetMap - Wikipedia

    en.wikipedia.org/wiki/OpenStreetMap

    Several mobile applications also edit OSM. Go Map!! and Vespucci are the primary full-featured editors for iOS and Android, respectively. StreetComplete is an Android application designed for laypeople around a guided question-and-answer format. Every Door, Maps.me, Organic Maps, and OsmAnd include basic functionality for editing points of ...