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+proj=deformation crashes when passed points outside model area #934

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kbevers opened this issue Apr 13, 2018 · 0 comments
Closed

+proj=deformation crashes when passed points outside model area #934

kbevers opened this issue Apr 13, 2018 · 0 comments
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@kbevers kbevers commented Apr 13, 2018

PROJ segfaults when trying to transform a point outside the defined area of the grids used in deformation as seen in the example below that uses the velocity model from the proj-datumgrids-europe package. The grid has a bounding box spanned by the points 3,53 (LL) and 40,74 (UR).

echo 12 50 0 0 | ./bin/cct  +proj=pipeline +ellps=GRS80 \
+step   +proj=cart \
+step   +proj=deformation +t_epoch=200.0 \
+xy_grids=nkgrf03vel_realigned_xy.ct2 \
+z_grids=nkgrf03vel_realigned_z.gtx \
+step   +proj=cart +inv
Segmentation fault: 11

A temporary fix is to make the grids optional and add the null grid:

+proj=deformation +t_epoch=200.0
+xy_grids=@nkgrf03vel_realigned_xy.ct2,@null
+z_grids=@nkgrf03vel_realigned_z.gtx,@null
@kbevers kbevers added the bug label Apr 13, 2018
@kbevers kbevers added this to the 5.1.0 milestone Apr 13, 2018
kbevers added a commit to kbevers/PROJ that referenced this issue Apr 13, 2018
When transforming coordinates outside the grid model the deformation
operation failed spectatularly. This is now fixed by checking that the
coordinate is inside the grid. If it isn't an error is returned and a
debugging log message is issued.

Closes OSGeo#934
kbevers added a commit to NordicGeodesy/NordicTransformations that referenced this issue Apr 13, 2018
This is in reaction to the bug reported here OSGeo/PROJ#934
kbevers added a commit to kbevers/PROJ that referenced this issue Apr 13, 2018
When transforming coordinates outside the grid model the deformation
operation failed spectatularly. This is now fixed by checking that the
coordinate is inside the grid. If it isn't an error is returned and a
debugging log message is issued.

Closes OSGeo#934
@kbevers kbevers closed this in #935 Apr 14, 2018
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