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Why OPUS solutions do not match published benchmark data

Question asked by GUY BIEN on Mar 1, 2020
Latest reply on Mar 10, 2020 by Jeff Jalbrzikowski

I have done several opus solutions for points and then checked into published benchmarks in the area and are missing the published elevation by +0.5' to +0.8' consistently.  I did an opus solution on a first order, class I benchmark and still was +0.5' above published info.  It seems like a systematic error and I am not sure how to isolate or find the error.