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2. List of online map services - Wikipedia

   en.wikipedia.org/wiki/List_of_online_map_services

   Google Maps - covers the whole country; Libre Map Project; MapQuest - covers the whole country; The National Map by the United States Geological Survey. Roadtrippers - covers the whole country; TerraServer-USA - covers the whole country; Uzbekistan. 2GIS, by 2GIS. Vietnam "Vietbando Maps", by Vietbando. "Vinalo Maps", Vinalo. See also

3. Closed graph property - Wikipedia

   en.wikipedia.org/wiki/Closed_graph_property

   Then Id : X → Y is a linear map whose graph is closed in X × Y but it is clearly not continuous (since singleton sets are open in Y but not in X). [4] Let (X, 𝜏) be a Hausdorff TVS and let 𝜐 be a vector topology on X that is strictly finer than 𝜏. Then the identity map Id : (X, 𝜏) → (X, 𝜐) is a closed discontinuous linear ...

4. Web Mercator projection - Wikipedia

   en.wikipedia.org/wiki/Web_Mercator_projection

   The standard style for OpenStreetMap, like most Web maps, uses the Web Mercator projection. Web Mercator, Google Web Mercator, Spherical Mercator, WGS 84 Web Mercator [1] or WGS 84/Pseudo-Mercator is a variant of the Mercator map projection and is the de facto standard for Web mapping applications. It rose to prominence when Google Maps adopted ...

5. Linear scale - Wikipedia

   en.wikipedia.org/wiki/Linear_scale

   The length of the line on the linear scale is equal to the distance represented on the earth multiplied by the map or chart's scale. In most projections , scale varies with latitude , so on small scale maps, covering large areas and a wide range of latitudes, the linear scale must show the scale for the range of latitudes covered by the map.

6. Wikipedia:WikiProject Maps - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:WikiProject_Maps

   Maps are useful in presenting key facts within a geographical context and enabling a descriptive overview of a complex concept to be accessed easily and quickly. WikiProject Maps encourages the creation of free maps and their upload on Wikimedia Commons. On the project's pages can be found advice, tools, links to resources, and map conventions.

7. Google Maps - Wikipedia

   en.wikipedia.org/wiki/Google_Maps

   Google Maps is available as a mobile app for the Android and iOS mobile operating systems. The first mobile version of Google Maps (then known as Google Local for Mobile) was launched in beta in November 2005 for mobile platforms supporting J2ME. [194] [195] [196] It was released as Google Maps for Mobile in 2006. [197]

8. Scale (map) - Wikipedia

   en.wikipedia.org/wiki/Scale_(map)

   The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground. This simple concept is complicated by the curvature of the Earth's surface, which forces scale to vary across a map. Because of this variation, the concept of scale becomes meaningful in two distinct ways.

9. Geographical distance - Wikipedia

   en.wikipedia.org/wiki/Geographical_distance

   Geographical distance or geodetic distance is the distance measured along the surface of the Earth, or the shortest arch length. The formulae in this article calculate distances between points which are defined by geographical coordinates in terms of latitude and longitude. This distance is an element in solving the second (inverse) geodetic ...