Proposal:Roof position

Roof position
Proposal status:	Draft (under way)
Proposed by:	Marek_kleciak
Tagging:	bottom:shape=*
Applies to:
Definition:	Notation of roof bottom shapes
Statistics:
Draft started:	2016-05-30

This proposal describes tagging of elements with bottom:shape=*, bottom:height=*, min_heght=* tags for 3D modeling similar to Simple 3D Building Specification.

Some roofs have negative value of the roof:height=* tag. This should be used for 3D modeling:

Some complex openings may be described as a sum of two or more building:part elements with bottom=* elements.

Following example - round opening in the wall is modeled with 2 elements:

Use of bottom:shape=* and bottom:height=* tags for building:part=* elements with bottom surfaces.

Examples of bottom structures

[1] [2] [3]