[Proj] Google Earth Accuracy
j.l.h.hartmann at uva.nl
Sun Nov 30 13:10:25 EST 2008
Irwin Scollar wrote:
> Are the points in that list available on the Web without charge? If
> so, please provide a link.
https://rdinfo.kadaster.nl/rd/kernnet_meter.xls: core points (425),
points (5763, including towers etc)
The lists contain only RD coordinates. The official conversion program
can be downloaded from http://www.rdnap.nl/download/setup%20cc41.exe.
It converts to and from WGS84, and also to and from Belgian Lambert and
German Gauss-Krüger coordinates. The official German conversion program
from the "Bundesamt für Kartographie und Geodäsie" is hidden at
> There are 16 sources of trig point data, one from each of the mapping
> agencies of the German "Länder". None of these were free of charge the
> last time I looked, so I haven't tested them.
Well, our cadastral and topographical agencies are not *very*
forthcoming with their data, but they made these points available for
benchmark hunters, people who try to find these points with their GPS's
and photograph them (http://www.geogames.nl/meetpunten/). Seems to be
very popular in the US (http://www.geocaching.com/mark/ and
More information about the Proj