Chynnah3312 Chynnah3312
  • 08-02-2024
  • Geography
contestada

To locate the true elevation at a site, surveyors have established _____ _____ marks also known as _____ marks.
A) Grading, Benchmark
B) Reference, Datum
C) Topographic, Contour
D) Flood, Gaging

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