camera_footprint kmls - longitudes outside [-180, 180]

[Daniel Evans]

Hi all,

I've encountered a case of an image near (but not crossing) the antimeridian where the KML footprint output contains coordinates that are both wrapped and unwrapped.

Is this expected behaviour? My expectation is that values would be trimmed to the range [-180, 180]. Skimming through some KML specifications, it doesn't seem to be explicitly forbidden for LineStrings (confusingly, it's forbidden for some geometry types but not others), but it is still a slightly surprising result.

I've attached an example KML and copied an excerpt showing the coordinates below.

Cheers,

Daniel

<coordinates>   181.407,70.9866,0
[...]
181.5,71.003,0
-178.493,71.0043,0
[...]
-178.324,70.9832,0
181.481,70.9477,0
181.488,70.949,0
181.495,70.9502,0
-178.498,70.9515,0
[...]
-178.329,70.9818,0
181.407,70.9866,0
[...]
181.495,70.9854,0
-178.495,70.9853,0
[...]
-178.331,70.9829,0
181.481,70.9477,0
181.486,70.9504,0
181.49,70.9531,0
181.494,70.9557,0
181.499,70.9584,0
-178.497,70.9611,0
[...]
-178.399,71.0194,0
</coordinates>

[Oleg Alexandrov]

This looks like a bug in a corner situation, close to the 180 degree longitude. If you share privately a testcase, I can take a look.

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[Daniel Evans]

To keep the mailing list in the loop, reproducing test case sent over to Oleg.

Cheers,

Daniel

[Oleg Alexandrov]

This was a bug (that in principle can affect logic beyond this tool). The latest build has the fix. Thank you for the report.