[Closed] Converting French IGN Grid Refs to normal lat lon

This should help:
https://epsg.io/transform#s_srs=3950&t_srs=4671
You may need to change the coordinate systems to get exactly what you want; there seem to be several covering France. You can display the position on a map, which help to ensure it's working.

Hmm, that seems to assume that the ref will cover all of france, and doesn't let you add the GR to specify the map tile. e.g. that grid ref i know to be near aussois but if you put in just the numbers it thinks its in the bay of biscay.

http://chemindeleau.com/spip.php?page=convertisseur#16/43.2948/-0.3549

Edit, that's my local swimming pool, click anywhere you want and the coordinates in various systems will appear in the boxes below.

Edukator - not the IGN 1:25k system tho 🙁

OK it gives the IGN cordiantes on this one you have to select UTM 30N in the "système de référence" in "afficher les coordonnées" by clicking on the spanner on the right hand side. Right click on the place you want then slelect "coordonnées". You'll hten have the lat and long in a little box and IGN in the menu you've opened on the right.

https://www.geoportail.gouv.fr/carte?c=2.4324226298828138,47.01796525342996&z=9&l0=GEOGRAPHICALGRIDSYSTEMS.MAPS.SCAN-EXPRESS.STANDARD:WMTS(1)&l1=GEOGRAPHICALGRIDSYSTEMS.MAPS::GEOPORTAIL:OGC:WMTS(1)&permalink=yes

[img] [/img]

Unless i'm being totally inept that doesn't show the IGN ones 🙁 I know that my example GR 0324 5012 coordinates is basically where that orange dot is, but none of the coords look like that.

I get 323,38 - 5011,13 for that junction, you need UTM 32N for that part of France, if you're on that part of the map it should be in the "sytème de référence" menu automatically if you've clicked on the location.

I agree you can't just enter a grid reference because when you try the only UTM options are for the DOM TOM. Unless I'm missing something too.

Edit: you have to hover the arrow over the point you want as the cordinates change as you rove around

Ah! I had it in UTM 30N. That's working now! Fantastic thanks!