Re: [Talk-GB] Mapping buildings with gables

2011-04-17 Thread Tom Chance
On 16 April 2011 20:19, andrew wrote: > Many houses in the London suburbs and elsewhere have polygonal or curved > bays > with square-ended gables above them. A typical example is: > > > http://geographyphotos.photoshelter.com/gallery-image/Ipswich/Gr5HlqvIzvDA/IAeFpmg6tFec > > Should we

Re: [Talk-GB] Mapping buildings with gables

2011-04-16 Thread Colin Smale
I would say that a 2d representation of a 3d building should be its 2d bounding polygon, i.e. its projection onto the ground. This is what you see from vertically overhead (for above-ground buildings, and leaving out effects of parallax for the moment). So in this case it would show the straig

Re: [Talk-GB] Mapping buildings with gables

2011-04-16 Thread Ed Avis
andrew writes: >Should we be mapping the outline of the gable because it is the greatest extent >of the building, the bay because it is the important bit or a straight line >because the bay and gable are too small to map sensibly? I think technically you should map what's at ground level. The b

[Talk-GB] Mapping buildings with gables

2011-04-16 Thread andrew
Many houses in the London suburbs and elsewhere have polygonal or curved bays with square-ended gables above them. A typical example is: http://geographyphotos.photoshelter.com/gallery-image/Ipswich/Gr5HlqvIzvDA/IAeFpmg6tFec Should we be mapping the outline of the gable because it is the