The Krovak Oblique Conic is a conformal projection. Therefore, the
transformation from one conformal projection to another may be accomplished
by using several common points to both projections. As long as the
difference in scalars is small (such as between UTM and the Krovak Oblique
conic, you can transform one X-Y coordinate system into the other with a
dX, a dY, a rotation, and a (small) scalar.
Note that for each change of zone (central meridian) you will have to solve
for a different set of transformation parameters with some common points.
That is exactly how the European 1950 Datum on the International ellipsoid
was accomplished after WWII.
Cliff Mugnier
LOUISIANA STATE UNIVERSITY
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Hi
I recently received from Slovakia some DWG files which feature metre
coordinates. The coordinates are Southings and Westings i.e increase to
the south and to the west.
What systems are probable ?, could anyone point me at or provide, probable
MapInfo.prj file entries or failing that probable elements of same
ellipsoid (Bessel WGS84, ?), Datum, Projection.
Lastly I have one map the title of which includes UTM, this seems rotated
relative to the Krovak (?) maps so should I calculate affine parameters.
In short any advice would be gratefully received.
Regards
Brendan O'Donovan
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