Wow…now I feel like I bit off a lot more than I can chew. But thanks McG and Liam.
McG, That “all on one line” thing you reported was what I was getting with an earlier generation of the download from the host (propelleraero.com), but I’m mystified that you got that from the 6" iteration I linked. I complained about that problem to them re: a previous iteration a few weeks back. Turned out one of their techs had the same bad outcome when he tested it, so he did some mysterious reprocessing, the eventual result of which was a really coarse version (I guess as a prelim test) at 10’ intervals. That one opened fine, but was too lacking in detail. So I asked for something finer and whether 6" was reasonable…and that’s the rest of that story.
I was able to readily open/orbit the ‘chunk’ you carved out. The .skp version performed OK. That made me wonder if my system might handle it now that I’ve rebooted (or something…) er, no. Took me several minutes to get the arrow-cursor over the ‘zoom’ control, then it just choked on my attempt to zoom to eliminate most of the rest of the contours, as I presume you were able to do, McG (yes?) Took me a good thirty minutes to get my disk-usage down from 100%, and even to do that, I had to “end process” to overcome the (not responding) mode.
Stabbing in the dark here, but would that indicate that maybe an SSD would help?
Even once I overcome the current problems, I’m going to have to do a ton of manual tweaking of the contours somehow. You can kind of see where the drone couldn’t quite see below some of the tree-canopies, and in those locations, it models things as if the trees have giant tarps thrown over them…so it’s up to me to try to restore the actual ground-level contours there in some fashion. I kinda hate that, but it’s still an incredible volume of Z-information compared with what I’d get for a huge cost from a regular surveyor.
Apparently LIDAR would be the answer to this because it can simply “see through the trees” from aloft, but it’s a rarity here in Honolulu, or simply doesn’t exist here. Drone guy would like to partner with a surveying firm to buy one for mutual use; I think he said they’re around $120K, though, so they’d have to see a good future for such a large investment to make sense.
Anyway, if you’ve got suggestions for cutting through some of the guesswork etc of this, I’m all ears.
Mahalo - Dave