Friday, 16 March 2012

VML now deprecated on map pages

Only applies to users of Internet Explorer versions older than 9.

Most modern browsers use Scalable Vector Graphics for rendering map data. For many years Microsoft refused to implement this, and used its own renderer, VML, in IE. This meant special code to deal with VML had to be included in map pages to cater for users of IE. Microsoft finally changed this policy and included SVG in IE9. They have now deprecated VML, and it will no longer be included in IE10.

So that users of browsers that support SVG are not slowed down loading unnecessary code, I have now removed VML support from the standard pages. It will be loaded separately for users of IE < 9.

As SVG rendering is much faster than VML anyway, users of IE < 9 are strongly recommended to either upgrade to version 9 or use another browser such as Chrome or Firefox.

1 comment:

  1. Just wanted to what a tremendous resource your site is. I would love to delve further into how you do it, but at 76, I don't think I have enough time left, so will have to be content with being a user of your maps.