How to set the annotation of X axis as Latitude when I use oblique projection

Q&A
18

I can try to write such an issue on GitHub in the GMT repository.

I just looked at the example we have in the PyGMT documentation at Oblique Mercator, 2: two points — PyGMT. Here, using +v leads to wrong annotations.

gmt coast -JOb130/35/25/35/6c -R130/35/145/40+r -Ggray -BWSNE -Bxa5f1g5 -Bya2f1g2 -png lon_lat_02

lon_lat_02
lon_lat_02921×1549 34.6 KB

gmt coast -JOb130/35/25/35/6c+v -R130/35/145/40+r -Ggray -BWSNE -Bxa5f1g5 -Bya2f1g2 -png lon_lat_v_02

lon_lat_v_02
lon_lat_v_02906×447 14.2 KB

gmt coast -JOb130/35/25/35/6c -R130/35/145/40+r -Ggray -BWSNE -Bxa5f1g5 -Bya2f1g2 --MAP_ANNOT_OBLIQUE=anywhere -png lon_lat_anywhere_02

lon_lat_anywhere_02
lon_lat_anywhere_02897×1645 40.3 KB

gmt coast -JOb130/35/25/35/6c+v -R130/35/145/40+r -Ggray -BWSNE -Bxa5f1g5 -Bya2f1g2 --MAP_ANNOT_OBLIQUE=anywhere -png lon_lat_v_anywhere_02

lon_lat_v_anywhere_02
lon_lat_v_anywhere_02898×518 19.9 KB

Edit 2024/03/28: Opened an issue at Oblique projection (Ob): Partly wrong annotations · Issue #8418 · GenericMappingTools/gmt · GitHub.