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  2. Comparison of web map services - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_web_map_services

    1–3 years [dubious – discuss] 1–3 years [citation needed] 1–4 years No 1–3 years 1–3 years 1–4 years Map data providers MAPIT, Tele Atlas, DigitalGlobe, MDA Federal, user contributions TomTom, OpenStreetMap, Intermap, Pictometry International, NASA, Blom, Ordnance Survey, [12] SK Planet TomTom, OpenStreetMap, and others

  3. Garmin BaseCamp - Wikipedia

    en.wikipedia.org/wiki/Garmin_BaseCamp

    Garmin BaseCamp is a map viewing / GIS software package offered free for download by Garmin, primarily intended for use with their GPS navigation devices. BaseCamp serves as a replacement to the now unsupported Garmin MapSource.

  4. Garmin .img - Wikipedia

    en.wikipedia.org/wiki/Garmin_.img

    The Garmin .img format is what Garmin devices use to store the maps for its GPS units. The img files contain a header and many subfiles. Img's filestore is based on FAT system. [1] Some old GPS units are not able to work with multiple img files so they need to be merged into one file called gmapsupp.img using programs like Mapsource. [2]

  5. Garmin - Wikipedia

    en.wikipedia.org/wiki/Garmin

    In May 2011 Garmin refreshed the eTrex product line with new mechanical design and support for advances in cartography and hardware technology with its release of the eTrex 10, eTrex 20, and eTrex 30, Garmin became the first company to manufacture and distribute a worldwide consumer navigation product supporting both GPS and GLONASS satellite ...

  6. Map database management - Wikipedia

    en.wikipedia.org/wiki/Map_database_management

    (For example, to plot a square object on a map, the vertices of the polygon are numbered 1,2,3,4,1, in this order) Another point for validation on data is the point in polygon, which helps in finding points lying outside a polygon. E.g., for a particular lon-lat coordinates in a city, if the point is intersecting the polygon in an odd number ...

  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.