Tank floor topo survey. Geodimeter 650, robotic and reflectorless shots.
?ÿ
What is usually in the tank and what did they need a topo of the floor for? ?????ÿ
Sweet setup. ?ÿGlad to see another dinosaur still in daily operation.
Took me a bit to figure out that pic... So, it's a porthole into the tank, and the gun is pointing out. What did it look like inside? How big was it?
Cool pic!
N
Got to be honest...saw the thread title and this was the first thing that came to mind.?ÿ?ÿ
https://en.wikipedia.org/wiki/Daily_Office_(Anglican)
@flga
It's a decommissioned fuel tank, which has just been refurbished and the topo was to get the floor shape (5 degrees slope) for volume calculations. It will hold ULP (unleaded petrol). It's 15m diameter.
The trick here was that there's two manholes opposite each other so we tooled up in the office to have instrument and backsight at each, shoot most of the tank from one side then simply transfer to the other to shoot what couldn't be seen from the first. Problem was, when we got to site, found that this tank has its roof supported by a center column, so that blocked the view between the manholes and we had to do a two station traverse outside the yard to get around to the other side. The instrument is backsighting to a station outside the yard. Looked very pleasant inside and considering that they were also blasting (the sand got on the equipment boxes and has scratched them where they rubbed on the drive home) and painting at the same time we should have put the instrument inside, but it's a confined space and we'd need other permits to do that.
The irregular shape of the floor is due to the overlapping plates, which show up in the topo.
That would have been the way to go for us. But we don't have a scanner (the Geodimeter sort of can, but she'd be slow).
Just quietly, the "misclose" (sp?) on two check targets was 4mm horiz and 1mm vertical, from a two leg traverse (50m each) to get around the tank. All done with the active prism, so no need to eyeball things. I have an official Geodimeter tribrach adaptor (the one with a vernier bubble) which when has the active prism mounted is the same height above the tribrach as the instrument (245mm).
Whenever my old dino gives up the ghost, I do look forward to being able to take DR shots someday...
DR with Vision (like on some versions of the Trimble S6) would be nice, then with a virtual joystick one could recline in the comfort of the wagon, and take shots.
Apparently that full kit Geodimeter 650 DR200+ cost $50k new. I've mentioned before that I bought it (instrument only - the radios, DC and prism had already been parted out) from a fellow in USA around year 2016. He's posted on here a couple of times a few years ago but retired and hence sold the equipment. He said it is the best Geodimeter ever made - probably correct on that. $25k to $50k for a new "equivalent" kit is out of our range.