Our test file uses this projection string: +proj=ob_tran +o_proj=longlat +lon_0=-97 +o_lat_p=42.5 +a=1 +to_meter=0.0174532925199 +no_defs
This projection string yields different results with R proj4's project() function on Debian than on other tested operating systems (Windows, CentOS, Ubuntu, Fedora, MacOS). It yields different results both with normal projection and inverse projection, and on a wide variety of coordinate inputs.
This can be most easily confirmed with the RHub docker container rhub/debian-gcc-devel
I have tested a few other projection strings - Mercator, Albers equal area - and found that their results do not vary between containers.
I have test the problem projection with command-line proj, and got results in agreement with the other operating systems.
So at the moment it is quite unclear what the problem is.
Our test file uses this projection string:
+proj=ob_tran +o_proj=longlat +lon_0=-97 +o_lat_p=42.5 +a=1 +to_meter=0.0174532925199 +no_defsThis projection string yields different results with R proj4's
project()function on Debian than on other tested operating systems (Windows, CentOS, Ubuntu, Fedora, MacOS). It yields different results both with normal projection and inverse projection, and on a wide variety of coordinate inputs.This can be most easily confirmed with the RHub docker container
rhub/debian-gcc-develI have tested a few other projection strings - Mercator, Albers equal area - and found that their results do not vary between containers.
I have test the problem projection with command-line
proj, and got results in agreement with the other operating systems.So at the moment it is quite unclear what the problem is.