j-s, this looks like it addresses your problem. i didn't read it ;)
http://nauticalcharts.noaa.gov/csdl/Vdatum_pubs/UShydro2003.4a_1.pdf brian ---------------------------------------------------------------- [EMAIL PROTECTED] wrote: ----- To: OpenSceneGraph Users <[email protected]> From: Jean-Sébastien Guay <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] Date: 06/11/2008 09:22AM Subject: Re: [osg-users] Convert/use GIS coordinates Hi again, > For example, from the specs document I've got, it seems the coordinates > we might get would look like > > 576120.324, 6224420.858, -102.73 I forgot to mention, what we have about the Z coordinate in the spec is: "GPS-Z, positive going up towards the sky, which can be above sea level, zero is LAT (lowest astronomical tide), negative is going down towards the seabed, which could be subsea" How do I interpret that? What I want is a position to place the object in 3D space. I assume the seabed (terrain) will be positioned correctly... And where do I put the ocean surface? Z=0 sounds like it could be incorrect (by the presence of conditional verbs in that sentence). Sounds like a very basic question, sorry about that. J-S -- ______________________________________________________ Jean-Sebastien Guay [EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
