+nadgrids=alaska doesn't transform in normalized longitude range 166E to 180E.

[proj4-bot]

Reported by mikrit on 25 Apr 2012 07:39 UTC
The NADCON files for Alaska are supposed to cover the longitude range "from 128 to 194 degrees west longitude", and that works. But if the input longitude has been normalized to the range from -180 to +180, then the +nadgrids=alaska doesn't recognize the longitude as inside the grid shift area.

Example input: Attu Island.

cs2cs +proj=longlat +ellps=clrk66 +nadgrids=alaska +to +proj=longlat +datum=WGS84

-187 53

187d0'10.946"W 52d59'54.068"N 0.000

173 53

173dE 53dN 0.000

By the way, I saw this in version 4.8.0, but it is impossible to specify 4.8.0 in the "Version" field when reporting a ticket.

Migrated-From: https://trac.osgeo.org/proj/ticket/158

[rouault]

Was fixed in PROJ 7.0 per d3e133b

$ src/cs2cs +proj=longlat +ellps=clrk66 +nadgrids=alaska +to +proj=longlat +datum=WGS84
173 53
172d59'49.054"E	52d59'54.068"N 0.000
-187 53
172d59'49.054"E	52d59'54.068"N 0.000