Maybe I nailed down the bug?Thank you, Bill. That answers my original question, "Can anyone describe under what circumstances Corpscon 6 returns erron...

The datum for NAD83 ellipsoid heights is GRS80. (Using NGVD29 or NAVD88 makes the input an orthoheight.)

See

Notwithstanding the Corps' warnings to the contrary, Corpscon 6 produces correct combined scale factors.As Loyal Olson and others have reported, Corps...

This is an example from NGS datasheet AF7601. In every instance, Corpscon 6 is in substantial agreement with the datasheet.[inlinecode]NAD 83 Latitud...

I am using NAD 83 coordinates with NAVD 88 orthometric or NAD 83 ellipsoid heights taken from NGS datasheets as Corpscon input and comparing the Corps...

Earth Survey>br>> > Way better than the Find-A-Control app.> > They also have some other really awesome programs. The PLSS one is real...

> > It works inside google earth for android. It's called ESmobile for Earth Survey mobile.> > I went to the page and tried to follow the...

Earth Survey Plugin> but will not be current as it is a private party, and probably based on the last data set in GeoCommunicator before we brought...