50
NAVD
88 GENERAL ADJUSTMENT COMPLETION
DATE OF JUNE 1991:
WHAT DOES THIS REALLY MEAN?
DATE OF JUNE 1991:
WHAT DOES THIS REALLY MEAN?
Bench
marks “POSTed” in large crustal movement areas, e.g., southern California, Phoenix, Arizona,
Houston, Texas, and southern Louisiana was published as special reports after the final
adjustment was
completed. This is an on-going,
long-term task which was started in January 1992. It is
important to note that some bench marks in crustal movement areas, i.e., bench marks
which were included in the NAVD 88 Helmert blocking phase, is available. The heights of these bench marks will be based on the latest
available data, but still may be influenced by crustal movement effects.
