DWR's Delta Survey of 1978-1980 The
Brian Atwater and crew compaired older surveys of the Delta with their own
current survey, to come up with a great series of maps showing where the Delta
islands and waterways were in the 1850's, the first official survey for the
state, and compared to subsequent official surveys over the years.
Official surveys included elevations, in some instances, which are recorded in
the Atwater maps. It is interesting to note that some of the Delta islands
have NOT subsided as the current administration of the state would want viewers
to believe. Natural waterway courses in the North Delta are clearly
defined over time; those natural waterways are eliminated in 2012 DWR maps of
the state, in come instances.
In any case, here's links to some of the Atwater survey maps that have been
scanned. We can add the rest if requested.