Export ESRI:54099 WGS_1984_Spilhaus_Ocean_Map_in_Square as PROJ string #4402
Conversation
There was a problem hiding this comment.
I tried to make spilhaus projections flexible enough to match ESRI adams ws2.
The only difference is the scale factor affected by sqrt(2).
But I only had the points reported by @mdsumner in the spilhaus issue #1851
If you set spilhaus settings +lat_c, +lon_c, rot and azi all to 0, you should have an Adams_ws2
yes I tested that. We could indeed map ESRI Adams_WS2 as PROJ spillhaus with Scale_factor * sqrt(2) if we get confirmation that there's also a sqrt(2) factor between ESRI:54098 WGS_1984_Adams_Square_II and PROJ's +proj=adams_ws2, hence my request to the community for test points for ESRI:54098 in #1851 (comment) . Or maybe @melitakennedy can provide us with some? |
d5a493f to
eb0aebc
Compare
|
PR updated to be more general and also replicate (almost) ESRI results for ESRI:54098 Thanks to @kgjenkins for https://github.com/kgjenkins/test-coordinates/blob/main/coordinates.csv test points: $ echo 80 -170 | bin/cs2cs EPSG:4326 ESRI:54098 vs ESRI: -9457034.1001 13296625.6969 $ echo 80 -170 | bin/cs2cs EPSG:4326 ESRI:54099 vs ESRI: -6624823.16092 14253430.1778 |
eb0aebc to
410892c
Compare
I agree, but now that the problem has been dealt with we are in an even better position. I expect to put out the release candidate at the beginning of next week. |
and fix ESRI:54098 mapping to use +proj=spilhaus with +k_0=sqrt(2) Fixes OSGeo#1851
410892c to
69eaf88
Compare
and fix ESRI:54098 mapping to use +proj=spilhaus with +k_0=sqrt(2)
On top of PR #4401
With it:
~/proj/proj/build_cmake$ echo 41.34837298 -117.28057438 | bin/cs2cs EPSG:4326 ESRI:54099
12421874.60 -14140625.11 0.00
Which matches ESRI values of #1851 (comment)