Discussion: sprint mapping question

When the footprint of a building is different from the view from above, how should it be mapped? Would the lighter gray overhang symbol be appropriate? The areas in question are mostly entranceways and measure around 8'x10'.

I always ask the question, "What would the racer see?"

Always the footprint, using the darker grey building symbol. Whether you map recesses as canopy or not comes down to Jordan's point - would a runner see the overhang as a covered space or not.

If the overhang is not significant, then I would just map the footprint at the ground level. If there is a significant overhang that a runner would see from a distance (as in the building goes out above), or if it might be confusing up close - then it would be good to map it. The only time it is truly necessary to map an overhang is if it creates a passage.

I would map them as 8x10 overhangs, gray areas I guess. They can be used as control locations perhaps, and certainly may be used for navigation.

thanks, I think this answers my question.

Yeah, it's a gray area.

I didn't think there was an ISSOM symbol for a footprint. One of our local mappers mapped the lines on a tennis court once but they were deleted in a recent update. Shame.

I think by footprint they meant where the building hits the ground. Mapping always requires a bit of generalisation, even at 1:4000.

Neil, you've been in the US too long; your ability to detect sarcasm and irony is depreciating.

I suppose this isn't ISSOM but you could map footprints with 5 mm contours :p
The map might get a bit cluttered with all the contours though.

Oh, I thought it was an American writing... sorry!

Irony overhangs are hard to spot, they often contain glass or just girders. I'd only map the more solid, concretey ones. In gray, as JJ says.

(can I get a visa yet?)

Oh feet, we americans can be quite adept at subtle humor. Think about all the great absurdist comedy we are responsible for, like Monty Python.

Monty Python, wasn't that an anagram for one of those banking institutions?

Think about all the great absurdist comedy we are responsible for, like Monty Python.

I would have thought Bottom was a better example. :)