Maybe there are a few different models....
...but the one my office uses is very much like a surveyor's transit and a reflector on a pole, hooked to a laptop sorta thing. I'm sure it's pretty much what you're talking about. My guys don't really use it inside smallish spaces, but they may...(notice I say *may*)...take it out if a crime scene is rather involved. Many times we will get a complete cluster-f!@k with some sort of Police-involved shooting. Maybe a 7-11 robbery gone bad that went out to the parking lot or became a pursuit.There may be an extended area outside with numerous casings, blood drops and whatever laying around that can be plotted easily.
Now that I think of it, the last time I know that it was used for a crime scene was about two months ago when a little sh!thead and his girlfriend were breaking into cars in a lot and the 75 year old Security Guard tried to stop them. He had his gun on the kid when the girlfriend got in their car and sped around the lot. She pulled up to pick-up the kid and in the process ran over the old guy. The kid just yelled "Floor it!" and she took off dragging the guard down the road, around two corners and finally back to the lot. He was dragged almost a mile under the car. They plotted the drag marks and where all the various chunks had fallen off of him and the skid marks where she tried to dislodge the body. Nice kids, huh. I just took the aerial photos the next day, but when they finished their drawing, it was remarkably accurate to the photos.
I know there is so much new equipment on the market today that it would fill four vans for each one we have now. In fact I got a call last month from some salesman who wanted to demo some sort of 3-D room scanner. When there is so much continous work to do, and when the people who do it have been on the job for many years they get a routine down that they don't like to break sometimes. So much of the new technology is great, but if you give scanners and plotters and fancy stuff to people who have trouble burning CDs, it won't always make their jobs easier. But the Traffic People like it.
OK, here are my equations for it:
W x OT = X$
...as in "The amount of work to be done, times the available overtime, will produce a paycheck of relative size."
...BUT...
TS(u)/time = x(BRASS)/#TV
...or, "Total Station's use in time is directly proportional to the number of Bigshots on scene in relation to the amount of TV cameras."
...or something like that...
:p
Brian C.
(all I remember from physics is F=MA!)