ISSOM canopy query

[dustytoo]

Putting together a map to ISSOM 2007, I downloaded the BOF symbol set, but in use I thought the canopies looked odd. Investigation revealed that in the version of the BOF symbol set that I have, canopy outline is set to 0.14mm thickness, and colour 50% black (ie mid-grey). The IOF ISSOM 2007 standard decrees 0.07mm and solid black. Does anybody know why this should be so? I couldn't find an answer.

[graeme]

I guess its a mistake. I use the OCAD defaults set (which also has mistakes).

Following the general ISSOM principle that clarity is everything, and that "Features that are not important for a competitor taking part in a sprint orienteering event should not be mapped" the canopy edge symbol can be omitted altogether when the "canopy" in question is a building cutthrough and the message you're trying to convey is "you can get through here".

[AndyC]

If dustytoo is mapping the feature I think he is , it isn't a cut through more a building where the upper floors overhang the ground floor (good control sites underneath)

[dustytoo]

Thanks for that - I've had to map an awful lot of canopies (building overhangs, cut-throughs, railway arches, elevated roadways...) and with my eyesight, the grey edges looked rather fuzzy. The IOF-spec black outlines look much better!

[Angry Haggis]

This (50% grey thicker border for canopies) appeared on the map for the St Alban's City Race at the end of April this year. I thought it actually improved the clarity quite a lot, making the canopies easier to spot against the buildings. Does anyone who ran in the St Alban's City Race have any comments about it, either positive or negative?