HTML Checking for Large Sites
Rocket Validator automatically scans your sites for accessibility issues using the W3C Validator,
hosted on our own servers and integrated into our web crawler.
HTML issues tagged as map.
The coordinates specified for an <area> element using the coords attribute are not in a valid format.
- For a rectangle (shape="rect"), the format X1,Y1,X2,Y2 is expected, where the top-left corner is specified by X1, Y1 and the bottom-right corner is specified by X2, Y2, therefore X1 must be lower than X2, and Y1 must be lower than Y2 because the coordinates 0, 0 start at the top-left.
- For a polygon (shape="poly"), the format X1,Y1,X2,Y2,...,Xn,Yn is expected to contain a list of coordinate pairs (at least 3, for a triangle).
- For a circle (shape="circle"), the format X,Y,R is expected where X, Y represents the coordinates of the center of the circle (from the top-left corner), and R is the radius.
Read more about the <area> element: