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  2. Treemapping - Wikipedia

    en.wikipedia.org/wiki/Treemapping

    The original tree is converted to a binary tree: each node with more than two children is replaced by a sub-tree in which each node has exactly two children. Each region representing a node (starting from the root) is divided to two, using a line that keeps the angles between edges as large as possible.

  3. World Geographic Reference System - Wikipedia

    en.wikipedia.org/wiki/World_geographic_reference...

    The World Geographic Reference System (GEOREF) is a geocode, a grid-based method of specifying locations on the surface of the Earth. GEOREF is essentially based on the geographic system of latitude and longitude , but using a simpler and more flexible notation .

  4. Module:Location map/data/Singapore - Wikipedia

    en.wikipedia.org/wiki/Module:Location_map/data/...

    Singapore_location_map_(main_island).svg Module:Location map/data/Singapore is a location map definition used to overlay markers and labels on an equirectangular projection map of Singapore . The markers are placed by latitude and longitude coordinates on the default map or a similar map image.

  5. Romer (tool) - Wikipedia

    en.wikipedia.org/wiki/Romer_(tool)

    This allows access to the map such that the location could be marked with a pencil if using the reference card in reverse having been given a grid reference to start with. They are used in many types of land navigation and map reading, to give a more accurate grid reference than one just estimated by eye from the grid lines on the map.

  6. Quadtree - Wikipedia

    en.wikipedia.org/wiki/Quadtree

    A tree-pyramid (T-pyramid) is a "complete" tree; every node of the T-pyramid has four child nodes except leaf nodes; all leaves are on the same level, the level that corresponds to individual pixels in the image.

  7. List of national coordinate reference systems - Wikipedia

    en.wikipedia.org/wiki/List_of_national...

    Given that every projection gives deformations, each country's needs are different in order to reduce these distortions. These national projections, or national Coordinate Reference Systems are officially announced by the relevant national agencies. The list below is a collection of available official national projected Coordinate Reference ...

  8. List of Heritage Roads in Singapore - Wikipedia

    en.wikipedia.org/wiki/List_of_Heritage_Roads_in...

    The Heritage Roads scheme was implemented in 2001 by the Singapore government to identify and protect roads whereby there are lush road-side trees, often so dense that they create "green walls" and even "green tunnels". [1]

  9. Wikipedia:Obtaining geographic coordinates - Wikipedia

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

    Find the feature or the location you want to know the geographical coordinates of, either by manually using the map and zooming in, or by entering a place name or address into the search field. Right-click on the map at the site where you want the pushpin to appear. A pop-up tab will appear. Select Add a Pushpin and save it.