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A marker image does not have to be small and opaque. A larger overlay image (with a transparent background) can be used to show particular features not included in the base map, such as a town's former walls (see the adjacent map, whic is using [[File:Leicester Town Walls map overlay.svg]] ).
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 ...
A Stonyhurst disk is a transparent circular grid with lines of longitude and latitude that can overlay a solar image to reference the positions of sunspots. This overlay system was originally created at the Stonyhurst College observatory. [1] [2]
The following examples document the use of the overlay_image parameter in the {{Location map+}} template. This parameter is also available via the {{ Location map }} and {{ Location map many }} templates.
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.
The conventional method of finding a watershed boundary is to draw it by hand on a paper topographic map, or on a transparent overlay.The watershed area can then be estimated using a planimeter, by overlaying graph paper and counting grid cells, or the result can be digitized for use with mapping software.
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Allows image numbered, textual number, or colour tag overlays to be positioned over an image to indicate particular features in the image. Up to 30 overlays can be positioned over the image. Any overlay can be placed over the image up to 3 times, to indicate multiple locations of the same feature in the image.