Bill93 is correct about the vertical. The "Project Datum" should be NAD 83 (and it's iteration). In Iowa that could be 1986, 1996, CORS96, 2007 or 2011. State Plane is not a datum, it's a projection of the lat/long defined with respect to the datum. He should also state whether the coordinates are in U.S. Survey or International Feet. Even though Iowa is a defined U.S. Survey Foot state it should still be there so there's no abiquity. He should also include his estimate of the positional accuracy of any coordinates/heights that he shows (e.g. .1, .05 ft etc)
> He should also include his estimate of the positional accuracy of any coordinates/heights that he shows (e.g. .1, .05 ft etc)
I like the idea, but that could really make for a mess. Is this positional accuracy related to other points in the job, to the control being used, to the reference frame? To what confidence interval should these values be given? Now we're getting into meta data about the meta data and we haven't even got the meta data right yet. Dare to dream, I suppose.
You Iowa folks... always trying to jam up Wisconsinites.
You are just jealous because you don't have any professional sports teams. 😀
You can't be serious. That is an embarrassment.
I saw a youtube video yesterday from magellan Professinal:
In it, they say that NAD83 is based on a single point at Father Point in Canada. WRONG. NAVD88, the US vertical datum, is based on that point. Nothing whatsoever to do with NAD83. They come across as experts, but that pretty much proves they are not.
And, they do not allow comments, so it is not possible to let them know about their bogus statement.
I don't see anything really wrong with saying "WGS84", except you need a position to go with it, at least a longitude (but they never come alone, so the latitude would be useful as well). But, it is a datum (and also an ellipsoid), so giving a position and saying "geodetic north" at that position is basically the same as giving an NAD83 position.
That was sad to watch. Phil should know better than that.
Now that you mention Father Point, I'm curious why TY5255 doesn't bring up a data sheet. Yes, it was held fixed in the adjustment and it's outside the normal area, but if it has a PID and it is so important, why not a data sheet?
Based on an agreement with the Canadian geodetic survey, NGS does not provide access to control in Canada even if it was used in an adjustment. Canada does the same for the U.S.
> You Iowa folks... always trying to jam up Wisconsinites.
>
> You are just jealous because you don't have any professional sports teams. 😀
Thanks Kevin!!
Anytime! I am a relocated Wisconsin boy. Gotta represent the homeland!
