There are all kinds of ways to define the points and path, but I don't see how the distance for a defined path of this order can be 7 ft different dep...

Oh, yes OPUS does add an additional uncertainty.?ÿ I just isn't from Geoid12B, or any geoid model's uncertainty that depends on your point's lat-lon. ...

Since DPOS reports the variation throughout the session and ignores the differences between CORS reports (until the residuals section), the variation ...

Distance can be defined in various ways.?ÿ Does their rule say direct line distance from property corner to property corner, direct door to door, dist...

CAN SELECT to report in feet. Beware that little number following the DPOS coordinates.?ÿ It is apples and pomegranates to the little number OPUS repo...

It's not free speech if they are selling it.

On what charge??

Most states have some form of Good Samaritan law that makes volunteer assistance immune if there is no recklessness. Some even require bystanders to p...

A picky point, but one that may improve clarity: SPC is a projection that can be calculated to or from latitude and longitude.?ÿ Another projection is...

I think you are right that the source is the "covariance matrix", but there should be a couple differences from your explanation.?ÿ A covariance matri...

I'm going to guess that B can't get the land from C, but he has a good case for damages from A based on the warranty deed. Now let's see what the expe...

2) Excellent datum handling between NAD83 and WGS84 Has Garmin fixed the transform yet??ÿ My 76 does a null transform and tells you NAD83=WGS84.?ÿ Tha...

The point is sometimes made that what gives a corner authority is reliance by the land owners.?ÿ If the surveyor sets an iron inaccurately and it is r...

We had a discussion here about the lack of realistic geoid uncertainties quite a while back.?ÿ The other point that came up then was the incorrect way...

If you look at the CORS info on the NGS web site you can find graphs of each one day by day and some of them show north, east, and/or up deviations fr...