@mathteacher Yes, my bad, I meant z is there. Z will not be there, and yes I know there are new datasheets. And that the superceded control will be ...

@mathteacher Again, you're mixing up calculations that aren't applicable. NAD27 is monument based. If you really need to get on NAD27 for some rea...

@mathteacher In the NAD27 days ellipsoid heights weren't used. The datasheet I downloaded explains quite a bit about how NAD27 was implemented and h...

@mightymoe Fascinating old data sheet! It doesn't have the 3d XYZ coordinates; they had only 2 dimensions to work with. Z is there, you had to ha...

@michigan-left Yes. But using metric is like everything else we've discussed here. Solving a problem often creates at least one more problem Olde...

@olemanriver The issue is that the conversions don't actually "get on" the point. It's been my experience that they get you close, if .5 to 1' is go...

TBC didn't calculate the same way as NCAT, but NAD27 is actually monument based. So a NAD27 coordinate system only really works when you're tied into ...

@mathteacher When I hover over a point on Google Earth I get Lat, Long, Elevation and it's really accurate in a world wide context. Sometime, maybe ...

@mathteacher Yes, it's less than 5PPM through the entire subdivision. 5PPM represents an elevation change of 200', .05' in 10,000' or .0005' in 100'...

@mathteacher Just off the top of your head, how long after each 150 lot is drawn and labeled would it take you to hand calculate each line, relabel ...

@mathteacher Think of it this way, I recently did a subdivision of small lots kinda in the country south of town. These lots were about 8000sq ft. T...

@mathteacher Just a few more lines of codes then.

@mathteacher I will leave it up to you to create that software, you still have giant rotations to deal with.

@norm Our engineering clients decide what coordinate systems to use. And like you say, they want what works well using their existing computer progr...

@mathteacher You can't legitimately charge a client to calculate each line the way you propose. Sure, we can figure out the ground distance using CS...

@pfirmst A crane tipped over behind me while surveying a huge building. No one was injured but it was a bad day at the mine.

@mathteacher I'll save you from the code. LOL Rover's diagram gives an overview, however, the state plane grid is always shorter (lower) than the ...

@mathteacher Grid is the projected surface. An inverse between coordinate pairs. How does it calculate ground? You want the code for the program?