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Researching the USGS "QL2" survey specs. Not real meatty on material, but seems an interesting project just the same. From a surveyor's perspective, it seems as though we need to meet the 9.25 cm tolerance for it to qualify as a QL2.
Any traps to look out for?
https://pubs.usgs.gov/tm/11b4/pdf/tm11-B4.pdf
Posted : October 11, 2016 8:54 am