LA COUNTY BENCH MARK HELP
Posted: Sat Dec 07, 2013 5:55 am
Does anyone happen to have available the 1929 NAVD value for this BM
Pasadena Quad BM No. Y 9471
A 1980 adjustment value would be great.
I have the 2005 adjusted NAVD 88 value but the area I am doing the survey in dates back to 1907 and any sub surface lines would have been based on the older datums.
Pasadena Quad BM No. Y 9471
A 1980 adjustment value would be great.
I have the 2005 adjusted NAVD 88 value but the area I am doing the survey in dates back to 1907 and any sub surface lines would have been based on the older datums.