Applicability of map markings to SC 1.4.11

[mraccess77]

Some of the requirements of SC 1.4.11 for maps can be met through alternatives like text descriptions, directions, etc. and if specific colors are needed like in heat maps they are exempted. But what about other common map elements needed outside of direction or a location such as a road. Would the road depicted on a map need to meet the contrast requirements if the purpose of the map was to identify and explore roads in an area? Because most maps like Google Maps have roads that touch different types of areas a single color would likely not work. Obviously different custom colorations, patterns, could be used including use of different layers and contrast modes - but most maps included on sites do not include this functionality.

[mbgower]

Draft WCAG 2 Task Force Response
Thank you for your question.

This appears to be a question about whether maps meet the essential exception for 1.4.11. The Working Group does not feel that maps automatically qualify as an "essential" presentation; however, a case for an essential exception could be made in certain circumstances.

There are many techniques which can be used to allow maps to meet the requirements of 1.4.11 Non-Text Contrast. However,
in some cases, depending on the circumstances, map graphics may be considered essential. For instance, if the base layer of the map is an aerial photograph, different parts of the photograph will not contrast sufficiently. Further, it ma be impossible to sufficiently contrast multiple layers against the entire range of colours in the photograph yet retain a usable map. In other situations, depending on the number of layers required in a specific use case, it may not be possible to achieve sufficient contrast between all graphical objects.
y