Variscale From Wikipedia, the free encyclopedia A variscale is variable length mechanical scale (ruler) designed to directly measure latitude and longitude on USGS maps.[1] References [1]Roos, M., 1967. Variscale stereo point marking instrument, Photogrammetric Engineering, 33(11):1260-64. External links Instructions for using the VariscaleThis cartography or mapping term article is a stub. You can help Wikipedia by adding missing information.vte Related Articles