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  2. Long distance observations - Wikipedia

    en.wikipedia.org/wiki/Long_distance_observations

    A typical example of long-distance observation. The Tatra Mountains as seen from the Łysa Góra, in southeast Poland, at a distance of about 200 km (120 mi).. Long-distance observation is any visual observation, for sightseeing or photography, that targets all the objects, visible from the extremal distance with the possibility to see them closely.

  3. Runway visual range - Wikipedia

    en.wikipedia.org/wiki/Runway_visual_range

    A pilot's view of Lisbon Airport's runway 21 in fog; runway visual range is about 200 m (660 ft). In aviation, the runway visual range (RVR) is the distance over which a pilot of an aircraft on the centreline of the runway can see the runway surface markings delineating the runway or the lights delineating the runway or identifying its centre line.

  4. Comparison of free off-line satellite navigation software

    en.wikipedia.org/wiki/Comparison_of_free_off...

    Some of the free software mentioned here does not have detailed maps (or maps at all) or the ability to follow streets or type in street names (no geocoding). However, in many cases, it is also that which makes the program free (and sometimes open source [ 1 ] ), avoid the need of an Internet connection, [ 2 ] [ 3 ] [ 4 ] and make it very ...

  5. Visibility - Wikipedia

    en.wikipedia.org/wiki/Visibility

    Foggy morning road On clear days, Tel Aviv's skyline is visible from the Carmel mountains, 80 km north. In extremely clean air in Arctic or mountainous areas, the visibility can be up to 240 km (150 miles) where there are large markers such as mountains or high ridges. However, visibility is often reduced somewhat by air pollution and high ...

  6. Heightmap - Wikipedia

    en.wikipedia.org/wiki/Heightmap

    A heightmap contains one channel interpreted as a distance of displacement or "height" from the "floor" of a surface and sometimes visualized as luma of a grayscale image, with black representing minimum height and white representing maximum height. When the map is rendered, the designer can specify the amount of displacement for each unit of ...

  7. Spatial weight matrix - Wikipedia

    en.wikipedia.org/wiki/Spatial_weight_matrix

    The concept of a spatial weight is used in spatial analysis to describe neighbor relations between regions on a map. [1] If location i {\displaystyle i} is a neighbor of location j {\displaystyle j} then w i j ≠ 0 {\displaystyle w_{ij}\neq 0} otherwise w i j = 0 {\displaystyle w_{ij}=0} .

  8. Size - Wikipedia

    en.wikipedia.org/wiki/Size

    A size comparison illustration comparing the sizes of various planets and stars. In each grouping after the first, the last object from the previous group is presented as the first object of the following group, to present a continuous sense of comparison. A bat skull next to a ruler used to measure size.

  9. Data and information visualization - Wikipedia

    en.wikipedia.org/wiki/Data_and_information...

    Visual tools used in information visualization include maps for location based data; hierarchical [7] organisations of data such as tree maps, radial_trees, and other tree_structures; displays that prioritise relationships (Heer et al. 2010) such as Sankey diagrams, network diagrams, venn diagrams, mind maps, semantic networks, entity ...