Here is how I am layering the City of London map, which I am creating using Adobe Illustrator and the MapStudio plugin. I’m basing the features/colours on the ISSOM2007 spec, as much as possible.
|O-Courses||Purple, Brown||Courses, Corrections, Northing Lines|
|Tunnel Walls||Black Dots, Brown||Showing runnable routes below main level. May use thick brown lines to show tunnel entry points.|
|Point Features||Black, Green||Statues, Fountains, Ornamental Pillars, Lifts*, Stairwells, Distinctive Trees|
|Buildings||Dark Grey, Black||Buildings|
|Construction||Black, White||Construction Sites and Hoardings|
|Barriers||Black, Dark Green||Uncrossable Barriers (Walls, Gates and Railings), Crossable Fences, Hedges, Historic Stone Walls|
|Low Walls||Light Grey||Crossable Walls|
|Out of Bounds Land||Olive Green||Permanent Out-of-Bounds Open Areas|
|Water||Blue||Lakes, Rivers, Water|
|Steps||Dark Grey||Staircases, Steps|
|Underpasses||Light Grey||Underpasses, Building Canopies|
|Vegetation||Dark Green, Light Green, White||Flowerbeds (OOB), Woods|
|Open Land||Yellow||Accessible grassy areas|
|Pavement||10% Brown||Pavements, Pavement-level Roads (May be revised to simply be thin lines show significant paved areas separated from the road.)|
|Road||20% Brown||Roads (Colour may be changed to match the Pavement colour, to aid clarity)|
|Steps, pavement edges, underpass boundaries||0.07mm|
|Out-of-bounds (OOB) boundaries**, crossable fences, building boundaries, prominent boundaries within OOB areas||0.14mm|
|Underpass dots (dot diameter)||0.2mm|
|Crossable walls, uncrossable*** barriers (fences/walls), stairwell sides and separators, construction site boundaries||0.35mm|
*These will probably be removed from the map in a later revision. You can’t really use one competitively!
**In some cases, no line is used (e.g. driveway) or the wall-line is used (obvious wall blocking use of OOB area as a run-thru.)
***Crossable underneath the barrier if dotted lines indicate a passageway underneath the main running level.