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  2. 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.

  3. QGIS - Wikipedia

    en.wikipedia.org/wiki/QGIS

    QGIS is a geographic information system (GIS) software that is free and open-source. [2] QGIS supports Windows , macOS , and Linux . [ 3 ] It supports viewing, editing, printing, and analysis of geospatial data in a range of data formats.

  4. Wikipedia : Graphics Lab/Resources/QGIS/Shaded reliefs

    en.wikipedia.org/.../Resources/QGIS/Shaded_reliefs

    In progress Need QGIS 1.8. According to this recent post and its comments : > QGIS 1.8 > Raster > Terrain Analysis > Relief (the raster will be relief + shade, unfortunately colors will be discrete and not smooth) or > (better)QGIS 1.8 > Raster > Terrain Analysis > Shaded relief (the raster will be only the shade).

  5. Digital elevation model - Wikipedia

    en.wikipedia.org/wiki/Digital_elevation_model

    The most common grid (raster) spacing is between 50 and 500 meters. In gravimetry e.g., the primary grid may be 50 m, but is switched to 100 or 500 meters in distances of about 5 or 10 kilometers. Since 2002, the HRS instrument on SPOT 5 has acquired over 100 million square kilometers of stereo pairs used to produce a DTED2 format DEM (with a ...

  6. Map algebra - Wikipedia

    en.wikipedia.org/wiki/Map_algebra

    Map algebra is an algebra for manipulating geographic data, primarily fields.Developed by Dr. Dana Tomlin and others in the late 1970s, it is a set of primitive operations in a geographic information system (GIS) which allows one or more raster layers ("maps") of similar dimensions to produce a new raster layer (map) using mathematical or other operations such as addition, subtraction etc.

  7. Shapefile - Wikipedia

    en.wikipedia.org/wiki/Shapefile

    The shapefile format is a geospatial vector data format for geographic information system (GIS) software.It is developed and regulated by Esri as a mostly open specification for data interoperability among Esri and other GIS software products. [1]

  8. Comparison of graphics file formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_graphics...

    Raster 32 bpc No Yes Yes Yes Yes No No Yes Yes Yes ILBM: Optional run-length encoding: Raster 8 bpc Yes No Yes Yes No Yes, Palette-shifting: No No Yes No JPEG: Lossy (and partly lossless), DCT, RLE, and Huffman predictive nearest neighbor Raster 8 bpc No No Yes Yes No No No Yes No No (see unofficial JPEG-HDR) Yes JPEG 2000: Lossy and lossless ...

  9. Wikipedia:Graphics Lab/Resources/QGIS/Create a topographic ...

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

    The QGis mapcolor files page already has some palettes you can copy, save as .qml, and use.. Save your first color style .qml file Done — section updated (2012/01). Copy-paste the following color code in an empty, plain text document (using something like Notepad or TextEdit), then save it in ./QGis/Mapcolors/ as Wikicarto_2.0.qml (the palette's name + .qml).