Category Archives: Delaware

Delaware First Adopter NAVD 88 For State Maps and Ebright Loses Foot!

The Colarado Springs Gazette reports that Delaware is the first state to adopt the use the new National Geodetic Vertical Datum of 1988 (NAVD 88) for its paper maps (as opposed to the 1929 Datum – NGVD 29 — used by virtually all maps). Although I have not seen a copy of the maps, I checked to see the impact on Ebright Azimuth and the highpoint loses more than a foot in the conversion!
Continue reading