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WVCaver2011 wrote:No Georefrencing Data in plot file. Data may be missing from the project or the file may have been compiled with an old compiler. Check the fixed links in the Project Manager and recompile.
I already have my line plot's entrance coordinates saved to the line plot.
John Lovaas wrote:If you are interested in finding places in the cave survey that are close to the surface, you might try writing a SQL query with the Select by Attribute tool. I'm working in 9.1, so everything I am suggesting may be totally archaic and useless.
Each cave survey station has an elevation attribute, as does each cell of a digital elevation model. You'd export a shapefile of the cave survey stations, and set your fixed station's elevation- it might best if they are in the same units as your DEM. I'm just guessing there.
I can't help you with the specifics of the query, but I'd be looking for DEM cells, witihin some defined horizontal distance to the nearest cave survey station (some kind of buffer function?) , that have an elevation attribute that is equal to/less than "X" (how far to you want to dig?), when compared to the elevation attribute of the nearest survey station.
Good times. ;-)
John Lovaas wrote:You can right click on your cave shapefile in ArcCatalog and assign a coordinate system- that'll be the one your cave coordinates are in.
If you want to know the relationship between the cave and the surface, you'll need data that represents the surface. That's where the DEM comes in.
I'd suggest spending some time with the ESRI tutorials. If they didn't come with the copy you have, they are available online as well. It'd save me a whole bunch of typing too.
Spike wrote:Does Compass not export 3D shape files? I'm not familiar with ArcGIS Explorer but my understanding is that Compass should be creating the 3D shapefile that can be looked at with Arc Scene or ArcGIS Explorer. If you would like to PM me and send me a copy of your shapefile I can look at it with the ArcGIS tools I have. Also try contacting Bernie Szukalski for some caver Arc support.
John Lovaas wrote:Hi all-
I just spent some time playing with the current download of ArcExplorer.
Using the current version of Compass, I can import a KML file of a cave survey into ArcExplorer. The only way I can bring a shapefile into ArcExplorer is by editing the shapefile's spatial reference in ArcCatalog- for whatever reason, the information doesn't come out of Compass for me, even though it is(according to the Compass documentation) set correctly within the .MAK file. Without the edit, I get an "unknown coordinate" error message in ArcExplorer. The same file would work in ArcMap for me. Oh well. You get a lot for free with ArcExplorer, but you don't get everything.
While the resulting 3D imagery is interesting, I don't think you are going to be able to do what you want to do- look at a nice 3D model of a cave floating under the land surface. For me, the cave shapefile(which is a 3Dprism) has a punched out appearance.
I've included an example of my lunchtime frittering here- the land surface is a combination of the ESRI base map and a 1m DEM of the area we are working in. The cave is a 3Dprism shapefile from Compass. I've put some transparency on the DEM. No matter how I modify the DEM's transparency, the cave shapefile's appearance remains consistent. It doesn't appear that ArcExplorer allows you to go "under" the basemap.
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