@bill93 We are talking GPS, your horizontal position affects your location on the derived Geiod model, the overall question is intriguing as to whether or not there is additional distortion in the verticals as a result of conversions.?ÿ
Of course get in NAD83 before looking at the geoid. But try comparing the geoid at a location near you versus a couple hundred feet away. In most places the difference is insignificant.
What if the NGS adopts a 2027 datum? Might we call it the NAD 27? Just when you think it can't get more confusing.....
Of course get in NAD83 before looking at the geoid. But try comparing the geoid at a location near you versus a couple hundred feet away. In most places the difference is insignificant.
Very true. The GEOID18 grid cells are 1 arc-minute in size, which translates very roughly to 5000 x 5000 feet. When interpolating a few centimeters across those distances, change doesn't usually happen very fast.
