Missing buildings due to margin

[alexhunziker]

Bug

Expected Behavior

Buildings should not disappear based on the margin chosen

Actual Behavior

The margin may cause buildings, which have a non-zero area metric to disappear (i.e. not be displayed).

In the screenshot below, the camera package contains a file with rloc=33 and thus should be displayed. However the folder is shown as if it was empty.

Screenshots

Steps to Reproduce the Problem

1. Select an AreaMetric in which small buildings exist
2. Increase the Margin
3. The buildings may disappear due to the margin

[alschmut]

Thanks @alexhunziker for adding this bug! This is actually one of the main issues using our treeMap algorithm, because it reduces all building areas in order to increase the margin around.

[ce-bo]

In the firefox.cc.json map there are a lot of missing buildings (e.g. the extension folder includes 90 files which are not drawn):

[RomanenkoVladimir]

part of #1609, closing the issue should also close this one

[BridgeAR]

@RomanenkoVladimir let's keep it open for now. AFAIK it would mostly be fixed but not completely.

[BridgeAR]

This should be fixed by #3077. @RomanenkoVladimir or anyone else, please check if that's the case and close it accordingly.