CRS transformation broken in Master?

[qgib]

Author Name: Andy Wood (Andy Wood)
Original Redmine Issue: 13735
Affected QGIS version: master
Redmine category:projection_support
Assignee: Jürgen Fischer

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Projects with Geotif layers being "on-the fly" transformed, which worked fine a few days ago, now generate 100% CPU usage and take many many minutes to be initially read in.

Sorry this is a very generic bug report, but Master is currently unusable with any of my projects that include transformed (EPSG:3762) Natural Earth geotif rasters.

Running up to date Debian testing with GDAL at 1.11.3+dfsg-2

[qgib]

Author Name: Radim Blazek (@blazek)

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Could it be caused by 1c22445 fix for #21700?

[qgib]

Author Name: Andy Wood (Andy Wood)

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I am not competent to comment on the technical details of the fix for #21700, however the following anecdotal evidence suggests that this is the source of the problem:

1. the time scale is about right - I started seeing this problem last week
2. when things were working I can confirm the presence of "white regions around the pole", but this was not a problem for me at that time.

Here is a test case to show the problem:

1. get http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/raster/NE1_LR_LC_SR_W_DR.zip
2. add layer NE1_LR_LC_SR_W_DR.tif and zoom in on 54'S 38'W
3. apply EPSG:3762

[qgib]

Author Name: Giovanni Manghi (@gioman)

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I can confirm it on master.

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• fixed_version_id was configured as Future Release - High Priority

[qgib]

Author Name: Radim Blazek (@blazek)

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Bisected to 51fe632.

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• assigned_to_id was configured as Jürgen Fischer

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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Fixed in changeset "d8f5dbeb4e7ab81326a400eaec05855ff1a38769".

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• status_id was changed from Open to Closed