- From: Jim Thatcher <thatch@attglobal.net>
- Date: Sat, 26 May 2001 11:11:03 -0500
- To: "Bailey, Bruce" <Bruce.Bailey@ed.gov>, w3c-wai-ig@w3.org
- Message-id: <NDBBKJDAKKEJDCICIODLCEDFDCAA.thatch@attglobal.net>
Server Side Image Maps (was: images / alt and image maps)Hi Bruce, Actually, the maps at MapBlast are image buttons and according to HTML 4: <quote> When a pointing device is used to click on the image, the form is submitted and the click coordinates passed to the server <endquote>. So they behave like server-side image maps but technically are not. Do you know of other examples of server-side maps in use that are not image buttons? You said that the provision about available geometric shapes applies to maps where each pixel is, in effect, a separate hot link. If so, how then can one hope to have equivalent text links for the hot spots? I want to emphasize that my example of King County was not raising the issue of whether or not that could be a client site map; instead I was pointing out that making their navigation banner a server-side map with text links at the bottom of the page provided a "skip navigation" technique and certainly did not interfere with access. Jim jim@jimthatcher.com Accessibility Consulting http://jimthatcher.com 512-306-0931 -----Original Message----- From: Bailey, Bruce [mailto:Bruce.Bailey@ed.gov] Sent: Friday, May 25, 2001 9:11 AM To: 'w3c-wai-ig@w3.org' Cc: 'thatch@attglobal.net' Subject: Server Side Image Maps (was: images / alt and image maps) The issue of why use server side image maps came up on the GL list recently (WCAG1 P1 checkpoints 1.2 and 9.1). The bit about "except where the regions cannot be defined with an available geometric shape" is, in fact, meant to apply to maps where each and every pixel is, in effect, a different hot link. As Jim points out, the header graphic at King County hardly qualifies to use this techique. We are taking about geographic maps, such as services provided by MapBlast and the like. From: "Jim Thatcher" <thatch@attglobal.net> To: "Rebecca Cox" <rebecca@cwa.co.nz>, <w3c-wai-ig@w3.org> Date: Fri, 25 May 2001 06:22:27 -0500 Message-ID: <MABBJNHDAODJNEJPGBCLGELKCCAA.thatch@attglobal.net> Subject: RE: images / alt and image maps Hi Rebecca, You asked for opinons - OK! Redundant text links should be available for server-side image maps; no reason for redundant links for client-side maps - You must use alt text for each of the areas. 7.4.2 is preceeded with "until user agents ...." and user agents are recognizing alt text on areas. I think it is wrong to also have text links when you have alt text on the areas ... Opinion. An example I used in the "web course" (http://jimthatcher.com/webcourse2.htm) for me raises a very interesting issue about image maps. The King County Washington site (http://www.metrokc.gov/) uses a sever-side map for its primary navigation and has equivalent text links at the bottom of the page. Section 508 would not allow this because the regions (lik all regions) can be specified in a client-side map. But using this server-side map with equivalent links at the bottom of the page provides a skip navigation method. A dilemma! Jim http://jimthatcher.com 512-306-0931
Received on Saturday, 26 May 2001 12:14:54 UTC