Bug #671
grdrotater bug?
| Status: | Closed | Start date: | 2015-02-05 | |
|---|---|---|---|---|
| Priority: | Normal | Due date: | ||
| Assignee: |  Paul | % Done: | 100% | |
| Category: | - | |||
| Target version: | Candidate for next bugfix release | |||
| Affected version: | 5.x-svn | Platform: |
Description
Hello,
I was trying to rotate a bouguer anomaly grid from Africa using the following commands:
gmt grdrotater af_bouguer.grd -Erotfile.txt -T120.4 -S -Faf_contour.txt -Vv > af_rot_contour.txt gmt grdrotater af_bouguer.grd -Erotfile.txt -T120.4 -Faf_contour.txt -Gaf_rot.grd -Vv
where rotfile.txt contains:
-34.2000 50.8000 120.400 -53.6900
While the first line correctly changed the contour position, the second one didn't work as expected (see wrong.png attached)
I then ran the following command, using the same pole:
gmt grdrotater af_bouguer.grd -e-34.2/50.8/-53.69 -Faf_contour.txt -Gaf_rot.grd
which worked well (correct.png). Shouldn't these lines have produced the same results?
(forgot to say: I am running it on linux, v. 5.1.2_r14035)
History
#1
Updated by Paul over 6 years ago
- Status changed from New to Feedback
Could it be possible for you to post the af_bouguer.grd, or if not, post the output of grdinfo af_bouguer.grd so I know what domain the file cover?
#2
Updated by Gabriel over 6 years ago
- File egm2008_africa.grd added
- File rotated_correct.grd added
- File rotated_wrong.grd added
Here is the grdinfo output (egm2008_africa.grd is the same as af_bouguer.grd):
egm2008_africa.grd: Title: Data gridded with continuous surface splines in tension
egm2008_africa.grd: Command: surface -T0.25 -Gegm2008_africa.grd -R-20/55/-37/40 -I5m
egm2008_africa.grd: Remark:
egm2008_africa.grd: Gridline node registration used [Cartesian grid]
egm2008_africa.grd: Grid file format: nf = GMT netCDF format (32-bit float), COARDS, CF-1.5
egm2008_africa.grd: x_min: -20 x_max: 55 x_inc: 0.0833333333333 name: x nx: 901
egm2008_africa.grd: y_min: -37 y_max: 40 y_inc: 0.0833333333333 name: y ny: 925
egm2008_africa.grd: z_min: -286.292175293 z_max: 407.717895508 name: z
egm2008_africa.grd: scale_factor: 1 add_offset: 0
egm2008_africa.grd: format: netCDF-4 chunk_size: 129,133 shuffle: on deflation_level: 3
#3
Updated by Paul over 6 years ago
- Status changed from Feedback to Resolved
- Assignee set to Paul
- Target version set to Candidate for next bugfix release
- % Done changed from 0 to 100
Thanks, fixed this bug. Will now also correctly report the rotation in the gridfile remark regardless of how the rotation is specified. In r14082.
#4
Updated by Paul over 6 years ago
Gabriel, did you verify that things work for you after the fix?