Opened 11 years ago

Closed 11 years ago

Last modified 11 years ago

#1110 closed defect (fixed)

Ways with thousands nodes makes Merkaartor unusable at lower zoom levels

Reported by: Tomas Tichy Owned by: cbro@…
Priority: major Milestone:
Component: merkaartor Version:
Keywords: Cc:

Description

If dataset contains any way with huge amount of nodes (thousands), Merkaartor is unusably slow at lower zoom level. For example dowload area using this link: http://www.openstreetmap.org/?lat=49.6873&lon=16.076&zoom=14&layers=B00FTF and zoom in. Each paint took several seconds (on my computer more than 10000 ms) which makes Merkaartor completely unusable in such area. When I zoom out and the huge way is completely visible on the screen, there is no problem. Also if I download any other area without such huge ways, everything works fine (each paint is below 100 ms).

Change History (5)

comment:1 Changed 11 years ago by Chris Browet

System / versions, please.

If you're on windows, this is a known bug. It's actually a Qt painting problem, only occurring on Windows Qt 4.4.0

comment:2 in reply to:  1 Changed 11 years ago by Tomas Tichy

Replying to koying:

System / versions, please.

If you're on windows, this is a known bug. It's actually a Qt painting problem, only occurring on Windows Qt 4.4.0

OpenSuse? 11.0, Qt 4.4.0, Merkaartor last from SVN.

comment:3 Changed 11 years ago by Chris Browet

Resolution: fixed
Status: newclosed

(In [9835]) FIX : another try at solving the "long-ways-at-high-zoom-makes-Merkaartor-unusable" problem (closes #1110)

comment:4 Changed 11 years ago by Colin Marquardt

I don't know if ways with thousands of nodes are affected, but current SVN is much much faster than before. Thanks a lot!

comment:5 in reply to:  3 Changed 11 years ago by Tomas Tichy

Great! Problems with long ways are gone and merkaartor is faster also in other cases. Thanks.

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