TITLE:
Geodetic Datum Transformation Parameters towards WGS84 Applicable to the 1/50k Topographical Map (1981) of Burundi
AUTHORS:
Johan Lavreau
KEYWORDS:
Geodesy, Cartography, Datum Calculation, Burundi
JOURNAL NAME:
International Journal of Geosciences,
Vol.7 No.5,
May
17,
2016
ABSTRACT: The knowledge of the
geodetic reference datum of maps or data is required for their use in a GIS.
Many older maps are lacking this information, making their use cumbersome. The
availability of an aerial coverage at high resolution of Burundi and digital
elevation model, based on a novel geodetic network, all calculated on the WGS84
datum, allows to calculate the datum applicable to older maps, for instance the
regular 1/50k map of the country. The method, based on the difference in
geocentric coordinates between points common to the two systems, yields: Δx =
-156.71 ± 10.2 m, .Δy = -3.26 ± 13.2 m, .Δz = -290.77 ± 21.06 m, well in
keeping with older values proposed by the NGA.