I'm writing a program that takes a point cloud and produces a TIN within a specified tolerance. A few days ago I met with a fellow surveyor named Pat, who gave me a document specifying vertical accuracy classes, ranging from 1 cm to 333.3 cm. I'm sure that this last number is actually 10/3 m, and likewise for 2/3 and 1/3. (Another number is given as 1.414 in one place and 1.4142 in another, but it's obvious that the exact value is √2.) I have to put a GUI on the program, with a pulldown or something for selecting the tolerance.
1. Should I always display the tolerance in meters or millimeters, or should I display it in feet if the file is in feet (which will be another option)? 2. If it's always in meters, how should I display 10/3 m? (If it's displayed in the file unit, it'll be displayed with 7 sig figs, to be different depending on which foot is selected.) Point densities are quoted in dots per square meter, even when the point cloud file is in feet. Pierre -- The Black Garden on the Mountain is not on the Black Mountain. _______________________________________________ USMA mailing list [email protected] https://lists.colostate.edu/cgi-bin/mailman/listinfo/usma
