278 reputation
28
bio website oschrenk.github.com
location Dusseldorf, Germany
age
visits member for 3 years, 7 months
seen Jan 16 '13 at 17:09

Sep
2
awarded  Notable Question
Apr
1
awarded  Popular Question
Jul
16
awarded  Popular Question
Jun
28
revised Computational most efficient way to convert Cartesian to Geodetic Coordinates
Add Toms, 1996
Jun
28
comment Computational most efficient way to convert Cartesian to Geodetic Coordinates
Ground surface will do for now, but I'm also interested in arbitrary geodetic heights in the long run.
Jun
28
asked Computational most efficient way to convert Cartesian to Geodetic Coordinates
Jun
19
awarded  Yearling
May
23
awarded  Supporter
Apr
25
awarded  Scholar
Apr
25
accepted How are EGM96 and WGS84 related to each other?
Apr
25
awarded  Quorum
Apr
24
awarded  Nice Question
Apr
24
comment How are EGM96 and WGS84 related to each other?
Ok. After some more reading I get it. The ellipsoid is in fact defined in a way to maximize the congruency (being defined as the theoretical equipotential lines of gravity/the geoid). It's always stated that "the geoid differs from the ellipsoid" in such and such way, which for me is kind of backwards. I think that is what confused me. So in conclusion: The WGS84 Standard defines both, the geoid and the reference ellipsoid. EGM96 also defines both. The geoid in EGM96 though has a better resolution. The changed geoid didn't result in a change of the reference ellipsoid though.
Apr
24
comment Precision when working with spatial data in GIS
That your precision should be based on the (project's) needs is understood. I'm evaluating the different models/algorithms to get a grasp of them.
Apr
24
comment How are EGM96 and WGS84 related to each other?
I've read this but didn't really understand it, maybe because English isn't my first language or maybe because I'm missing domain specific knowledge, hence my question. So both standards define a geoid and an ellipsoid (with EM96 superceding WGS84). Ok. For me the question that remains is then, that if both ellipsoids have the goal to maximize congruence with its geoid (being defined in the same spec).
Apr
23
awarded  Editor
Apr
23
revised How are EGM96 and WGS84 related to each other?
edited title
Apr
23
asked How are EGM96 and WGS84 related to each other?
Apr
19
comment Precision when working with spatial data in GIS
Thanks. A table of contents can found here‌​. From the titles I could not discern any comparative (or introductory) studies. From what I'm reading so far I'm missing the link between the real form of the earth to the various representations and how accuracy is then measured. For example how can it be said that Vincenty is accurate to about 0.5mm?
Apr
19
asked Precision when working with spatial data in GIS