convert REGCAN95 coordinates to OpenStreetMap coordinates (WGS84-Form in lat/long)

Question

I have some coordinates in datum REGCAN95, and I want to know how to convert them to something usable in OpenStreetMap.

I have found that REGCAN95 uses the EPSG codes as follows:

For example I have the coordinate 28BR205306 or 28BR067530, which I want to find in OpenStreetMap or other webmaps. How can I convert them?

I would guess those are MGRS except they're missing one of the letters. I think they should be 28RBR, but that puts them offshore. At that precision they're only good to the closest 100 meters. — mkennedy, Mar 15, 2016 at 21:04
@mkennedy: Ok, but can you tell me how to interpret the numbers? Which is the x and which is the y coordinate? Just separate them in the middle? So three numbers for each coordinate? Or how can I enter them in one of the many transformation tools? And what does the R B R stand for? How did you guess the R is important or missing? — erik, Mar 15, 2016 at 22:29
Please do a search for MGRS here or Wikipedia. A comment isn't long enough. — mkennedy, Mar 16, 2016 at 6:35

erik · Accepted Answer · 2016-03-16 10:42:31Z

1

Thanks to the comments from mkennedy I read the Wikipedia article about MGRS, which told me, that my coordinates, which are of the following form

4QFJ 123 678

represent a precision level of 100 m.

I then found the conversion tool GeographicLib at Sourceforge, which helped me convert the coordinates.

answered Mar 16, 2016 at 10:36

erik

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