failure to draw overlapping polygons in workslice view

[HamishB]

Hi,

when you checkout at a coarser box size over the top of an earlier checkout, the resulting shaded polygon is not rendered on the map view.

two examples:
http://linz2osm.openstreetmap.org.nz/workslices/215/show/
http://linz2osm.openstreetmap.org.nz/workslices/219/show/

also, "View bounding box On openstreetmap.org" for those just zooms in on a nearby bit of ocean.

thanks,
Hamish B

[stephend]

Do you mean a checkout where the whole of its extent is already part of one or more existing checkouts? Or any checkout that covers existing checkouts?

[HamishB]

for workslice 219 I think the checkout was over the top of the whole layer's bbox.

this should all be all greened:
http://linz2osm.openstreetmap.org.nz/workslices/create/layer_in_dataset/30/

[stephend]

I can reproduce this issue only for checkouts that are complete overlaps, not partial overlaps. Such checkouts are not usually supposed to result in any features being selected, and since zero-feature checkouts aren't permitted, shouldn't normally happen. I'm downgrading this to the long term wishlist.

[HamishB]

I can reproduce this issue only for checkouts that are complete overlaps,
not partial overlaps. Such checkouts are not usually supposed to result in
any features being selected,

why not? a typical case would be if you had finished all the fine work, and did a final big-area checkout of the area to catch any blocks you'd previously missed.

[stephend]

I mean a complete overlap in the sense that every square metre of the checkout is already included in previous checkouts - which at the moment shouldn't produce any features. (It will in future as part of #97 - in that case I'll actually display the checkouts as overlapping).