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  2. Helmert transformation - Wikipedia

    en.wikipedia.org/wiki/Helmert_transformation

    Using it, it becomes possible to convert regional surveying points into the WGS84 locations used by GPS. For example, starting with the Gauss–Krüger coordinate, x and y, plus the height, h, are converted into 3D values in steps: Undo the map projection: calculation of the ellipsoidal latitude, longitude and height (W, L, H)

  3. Wikipedia : Graphics Lab/Resources/QGIS/Get ready

    en.wikipedia.org/.../Resources/QGIS/Get_ready

    QGis (full name: Quantum GIS) is a GPL license, cross-platform (Windows, Linux, Mac), and rather friendly cartographic software application. It is a Geographic Information System (GIS) program you can use to create, view, and analyze maps.

  4. Keyhole Markup Language - Wikipedia

    en.wikipedia.org/wiki/Keyhole_Markup_Language

    The contents of a KMZ file are a single root KML document and optionally any overlays, images, icons, and COLLADA 3D models referenced in the KML including network-linked KML files. The root KML document by convention is a file named "doc.kml" at the root directory level, which is the file loaded upon opening.

  5. Restrictions on geographic data in China - Wikipedia

    en.wikipedia.org/wiki/Restrictions_on_geographic...

    [37] [19] Baidu provides an API call to convert from Google or GPS (WGS-84), GCJ-02, BD-09, MapBar or 51ditu coordinates into Baidu or GCJ-02 coordinates. [38] [18] As required by local law, [38] there is no API to convert into WGS-84, but open source implementations in R [20] and various other languages [29] exist.

  6. QGIS - Wikipedia

    en.wikipedia.org/wiki/QGIS

    QGIS also makes it simple to share and publish geospatial data as maps, online services, or print maps in a variety of file formats, such as shapefiles, GeoTIFFs, and KML files. Screenshot of Print Composer. In order to prepare printed map with QGIS, Print Layout is used. It can be used for adding multiple map views, labels, legends, etc.

  7. GDAL - Wikipedia

    en.wikipedia.org/wiki/GDAL

    The Geospatial Data Abstraction Library (GDAL) is a computer software library for reading and writing raster and vector geospatial data formats (e.g. shapefile), and is released under the permissive X/MIT style free software license by the Open Source Geospatial Foundation.

  8. 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 ...

  9. KMZ - Wikipedia

    en.wikipedia.org/wiki/KMZ

    KMZ may refer to: Keyhole Markup Language files when compressed; Organizations. Kievskiy Mototsikletniy Zavod, a Soviet / Ukrainian maker of the Dnepr series of ...