Skip to content

Datum shift correction for Amersfoort (EPSG:4289)#551

Merged
ahocevar merged 2 commits intoproj4js:masterfrom
algil:master
Mar 6, 2026
Merged

Datum shift correction for Amersfoort (EPSG:4289)#551
ahocevar merged 2 commits intoproj4js:masterfrom
algil:master

Conversation

@algil
Copy link
Copy Markdown
Contributor

@algil algil commented Mar 5, 2026

Rotation values changed from microradians to arcseconds as described in issue #549

Fixes #549

Rotation values changed from microradians to arcseconds
@ahocevar
Copy link
Copy Markdown
Member

ahocevar commented Mar 6, 2026

Thanks, @algil. I investigated a bit more, and found that our updateDatums script, which reads helmert transform parameters from proj.db, did not take the advertised units of measure into account. I fixed that (with help from Claude Opus 4.6), and now all datums should be correct.

@ahocevar ahocevar merged commit 29517dc into proj4js:master Mar 6, 2026
5 checks passed
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

Netherlands RD (EPSG:28992) : inaccuracies of 100m when using PROJJSON or WKT2

2 participants