Imagemaps

The map information is stored in a NCSA `map file', the format of which is as follows.

Lines beginning with # are comments.
Every other non-blank line consists of the following:

method URL coord1 coord2 ... coordn

URL is one of the following:

A Local URL
For example: /docs/tutorials
A Full URL
For example: http://www.yahoo.com/

A coord entry is a x,y coordinate, the number depends on the method as show below.

Method	Coordinates	Comments
default	none	For the default URL
circle	center edgepoint	For a circle
poly	Each coordinate is a vertex	For a polygon of at most 100 vertices
rect	upper-left lower-right	For a rectangle
point	point x,y	For closest to a point

Notes:

• Each method is evaluated in the order it is placed in the configuration file. If you have overlapping areas, such as a circle inside of a rectangle, you should place whichever one you want evaluated first before the other in the map file. In this case, we would put the circle before the rectangle.
• Also note that it does not make sense to use the default method with the point method because if even one point method is specified, anywhere you click will be considered close to the point and the URL specified by point will be serviced.