I'm quite new to OpenDX - this is probably a very newbie question. I recorded temperature, conductivity, transmissivity and depth with a CTD at a lake. Recording was done in at 16 locations in a 4x4 grid. In OpenDX I made a .general file that contains X Y Z and "value". It was imported as scattered to allow for the occasional sampling site that doesn't conform to the 4 x 4 grid. Finally, I used Autogrid & made 2d slabs, isosurfaces, etc.
I'm happy with the output - except in certain areas there are connections (&positions?) at depths that the bathymetry should not allow (ie. Interpolation has continued deeper than the bottom of the lake). Not surprising. The bottom of the lake is very irregular - each sampling site is a different depth. In the .general file, data at each sampling site stops at the lake bottom. After combing through the User's guide, I think the approach I should take is to use the Include module & modify my data file. Rather than having the data "stop" at the lake bottom, I could make Z at each X Y stop at some Z that is deeper than the deepest sampling location. I could make the grid "aware" of the real bathymetry by adding invalid positions with Include (ex. X, Y, Z, flag). Where the flag is used if Z > lake bottom at position X, Y. I thought I'd check to see that I'm on the right track before I go ahead, since modifying the file to this format will take a fair bit of time. Thanks in advance, Ted Lewis
