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Vector overlay is an operation (or class of operations) in a geographic information system (GIS) for integrating two or more vector spatial data sets. Terms such as polygon overlay , map overlay , and topological overlay are often used synonymously, although they are not identical in the range of operations they include.
A tiled web map, slippy map [1] (in OpenStreetMap terminology) or tile map is a map displayed in a web browser by seamlessly joining dozens of individually requested image or vector data files. It is the most popular way to display and navigate maps, replacing other methods such as Web Map Service (WMS) which typically display a single large ...
The Great Britain Historical GIS (or GBHGIS) is a spatially enabled database that documents and visualises the changing human geography of the British Isles, [1] although is primarily focussed on the subdivisions of the United Kingdom mainly over the 200 years since the first census in 1801.
In differential geometry, the Gauss map of a surface is a function that maps each point in the surface to a unit vector that is orthogonal to the surface at that point. Namely, given a surface X in Euclidean space R 3 , the Gauss map is a map N : X → S 2 (where S 2 is the unit sphere ) such that for each p in X , the function value N ( p ) is ...
Distress, or distraint, the act of seizing goods to compel payment; Distress, a novel by Greg Egan; Distress, a 1946 French film; Distress, a 1929 French silent film; Distress signal, a recognized means for obtaining help; Distressed inventory, goods or materials whose potential to be sold at a normal cost has passed
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...
Ten or so years ago, many free images were first uploaded to local Wikipedias and only later moved to Commons, so there were many free images available locally. There were also some people opposed to moving images to Commons, as they perceived that to be a loss of control over their files.
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