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In HTML and XHTML, an image map is a list of coordinates relating to a specific image, created in order to hyperlink areas of the image to different destinations (as opposed to a normal image link, in which the entire area of the image links to a single destination). For example, a map of the world may have each country hyperlinked to further ...
In order to create an interactive map in an article, you need to have one of the below forms of data: coordinates, either supplied or from Wikidata; a Wikidata ID for a shape or linear element; data stored in GeoJSON format in a data file; raw GeoJSON, preferably transcluded from another page
The image acts as a hypertext link to the specified page. Do not enclose the page name in square brackets. If Page is a URL, the image acts as an external link; otherwise it links to the named Wikipedia page. Image maps offer more possibilities. [[File:Example.png| link=Name of page |alt=Example alt text]]
PNG is a lossless, truecolor image format. It is good for all maps and particularly for maps with more than 256 colours. As a pixel-based image, it is more difficult than an SVG image to edit. Some uploaders prefer to work with SVG and then upload a PNG version. SVG is vector graphics format, which has three main advantages:
Thus all labels and all standard symbols (such as a dot for a town) can be superimposed on a map, and the map image itself needs to show only the curves for coasts, rivers, boundaries, roads, railways, etc., possibly with areas filled with colors.
Example of a static image map. Many maps on Wikipedia use static image files, in which content does not update dynamically. These files are typically in PNG or SVG format, and are listed at Commons:Category:Maps. In order to update or alter such a map, changes must be made manually using a editing program.
A Web Map Service (WMS) is a standard protocol developed by the Open Geospatial Consortium in 1999 for serving georeferenced map images over the Internet. [1] These images are typically produced by a map server from data provided by a GIS database.
Interactive image map of the global topography of Mars. Hover your mouse over the image to see the names of over 60 prominent geographic features, and click to link to them. Coloring of the base map indicates relative elevations, based on data from the Mars Orbiter Laser Altimeter on NASA's Mars Global Surveyor.