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Does anybody know where I can find the technical details for Burma's latest datum? It's called Myanmar Datum 2000 and I can't find any details online. I need the details to create a custom datum on my Garmin GPS.

What I need is the dx, dy, dz, da, and df.

If this isn't available, what is the closest datum that could be used instead?

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    Perhaps you could contact suntac technologies (suntactechnologies.com/f.htm) who seem to have used it
    – nmtoken
    Commented Apr 11, 2014 at 12:45
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    I managed to track down the Survey Dept website, but it had no information. It did say that you have to have military approval to buy topo maps...that implies to me that this type of info is not going to be available.
    – mkennedy
    Commented Apr 13, 2014 at 22:41
  • I Have a complete set of these maps, and now face the same question.
    – user37953
    Commented Oct 8, 2014 at 15:08

3 Answers 3

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We have set our Garmins to the Indian Thailand 1975 datum with Everest 1830 spheroid. Seems to match. Otherwise running WGS 84 gives us grids that are 3-5KM shy of true location.

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  • I've used that in the past, but using it with the Myanmar maps still gives about a 200-500 meter error, which is not acceptable for my purposes.
    – Josh
    Commented Nov 3, 2014 at 3:57
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Myanmar Datum 2000 Everest 1830 a = 6377276.345 f = 0.00332445 1/f = 300.8017

Xshift -246.632 Yshift -784.833 Zshift -276.923

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  • Reference: un-ggim-ap.org/uebm/201607/W020161026570135032964.pdf
    – AndreJ
    Commented Nov 26, 2016 at 15:42
  • The link to the reference provided above is dead. This is a current link: en.nasg.gov.cn/events/201612/W020161222343354164551.pdf. This is ostensibly official Myanmar government data, however, the flattening factor for the Everest 1830 ellipsoid appears to be incorrect. The parameters provided by George Nyi above are evidently the correct ones and coincide with the 1937 definition of the Everest 1830 ellipsoid. His dx, dy, and dz values are the same as in the reference.
    – user95382
    Commented Apr 13, 2017 at 11:37
  • It should be worth clarifying the given shifts are WG84 to local.
    – YeO
    Commented May 19, 2018 at 13:22
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proj4: +proj=longlat +a=6377276.345 +rf=300.8017 +towgs84=246.632,784.833,276.923,0,0,0,0 +units=m +no_defs

Since this datum uses Everest 1830 (1937 Adjustment) or EPSG 7015 ellipsoid
da = 860.655
df = 0.000028361368

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