An illustration: For the local HARN point: Ellipsoid heights from the DS: 1994=1173.304m, 2001=1173.260m, 2007=1173.219, 2011=1173.185 NAVD88 ORTHO He...

In theory the NAVD 88 elevation shouldn't change regardless of the various Geoid models and ellipsoid heights used. Of course, that's not what happens...

That's not the correct way to do it as I understand it. The Geoid model should match up with an ellipsoid height epoch. In other words Geoid 18 should...

This site is something. This morning I was on the phone with a colleague who is on "vacation" at the beach. He recently retired and began a monologue ...

With interstate pavement, the centerline seam is vitally important. Usually after the mill there will be a straight side, normally the parking side an...

Interstate projects are highly controlled, even a simple overlay. It's difficult to imagine one without site control. I can see not using it causing a...

Got the field survey back, 8 courses down to two, 7 angle points down to one.

I've usually seen about 1-2 minutes for the curve data (tangent-tangent) lines. If they say a 20d15' delta I can expect a delta that's close to the re...

An Interstate? Unless you are in an area where DOT only uses VRS, then they should have control set along the Highway. I would get with them and occu...

The boundaries I stake through timber are all with posts, then the trees vanish during fence construction. It's kinda cool to look at some of those ar...

Rover, I'm doing a terrible job of explaining what I mean. In Access it's possible to set up a job with a custom projection. What I think the OP wants...

Rover, I don't think it's a question of only being able to do it with TBC. From what the OP stated is all he has is Access and a DC, even if the proje...

There's a lot to unpack here. Any tight control, in other words control that has good geometric internal consistency, can be merged from terrestrial t...

It would be an extremely rare circumstance. When you mention area, do you mean a called for acreage, or a fraction? The West 5 acres of tract xx, an...

I'm not sure when dynamic scale blocks showed up (maybe mid 90's?). We have them with a graphic scale, a north arrow, coordinate, elevation, scale fac...

The more this is discussed, the less I want to use them. It's usually a pain to find room for them, the only plats where they are required are Subdiv...

That plat is awesome, I wish 1960 plats I've worked with were half as good as that one.

I refuse to do my plats with the expectation that someone will scan/print it to odd sizes. If they reduce or expand it, that's on them. It's a reason ...

That's typical, my guess since it's along the property boundary is that it ties into a monumented line that didn't quite match up with the math. So to...