Image map

Example, " continents"

Clickable Graphic ( engl. image map ) is a term used in web design and also refers to multimedia programs. It provides a way to embed hyperlinks within a graphic. This can be realized with the variable shape = as rectangular (rect ), round (circle ) or free ( poly) buttons that such references ( anchor links ) behave in the hypertext of an HTML document. In general, a changing cursor indicates the invisible buttons. Clickable Image Maps are used in both picture and video files.

On websites frequently encountered examples are maps identifying specific regions lead to the corresponding pages. Another example are often " interactive " Advent in winter.

  • 5.1 Tutorials
  • 5.2 Software
  • 5.3 scripts

Definition in HTML

A defined in HTML image map consists of an actual image that is defined with an image tag. At the same time an attribute is specified usemap in this, that refers to the image map.

Problem in spam emails

Image maps are in so-called spam mails often misused the receiver simulate a wrong page:

           < / map>    This code causes the URL of the spoofed bank appears in the status bar of a mail reader (here, the Dresdner Bank), but when clicking on an image area of the page spoofers (here XXX marked) opens.

Clickable Image in video

Also in digital video files referencing sensitive graphics can be applied. Here, the producer ( or manufacturer ) of the video must write a map file ( as a plain text file) that contains all necessary information, such as

  • Type, number and appearance ( rectangles, circles, polygons ) of the clickable referencing sensitive areas
  • Time intervals during which the active areas are

Examples of applications are active from the audience einzublendende additional information or advertisements.

Swell

HTML 4.01

  • Image maps, W3C Recommendation 24 December 1999 ( English)

HTML 5

  • Usemap (attribute of img ), W3C Working Draft 25 May, 2011 (English)
  • Ismap (attribute of img ), W3C Working Draft 25 May, 2011 (English)
  • Map - image -map definition, W3C Working Draft 25 May, 2011 (English)
  • Area - image -map hyperlink, W3C Working Draft 25 May, 2011 (English)
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