[PROJ] Migrating from PROJ 7 to 8

[Torsten Martinsen]

Hi,

I have some code (written by a previous coworker) that uses the functions pj_ctx_alloc(), pj_init_plus_ctx(), and pj_fwd(). These have been deprecated for some time and were removed in PROJ 8.

I have searched the documentation etc., and while it is quite simple to figure out the current equivalents for the two first functions, I cannot figure out the replacement for pj_fwd().

For reference, the code in question is in essence:

void projection::forward(double& x, double&y) const
{
   projUV p;
   p.u = x * geo::deg_to_rad;
   p.v = y * geo::deg_to_rad;
   p = pj_fwd(p, proj_);
   x = p.u * geo::rad_to_deg;
   y = p.v * geo::rad_to_deg;
}

where 'proj_' is returned from pj_init_plus_ctx().

Regards,
Torsten Martinsen