Measurement accuracy capabilities in the field will probably continue to improve. But as has been suggested in some of the earlier posts, we have rea...

Does everyone agree on a definition for the height of the mountain, so they know what they're measuring? Seems like it would be a bit hard to measure...

But the standard deviations on pt 12 and pt 31 were around 0.01 and the distances 12-31 and 31-48 are similar. No way this should produce an uncertai...

Shawn Billings, post: 432462, member: 6521 wrote: The math is based on a Helmert 7 parameter transformation, which is a least squares approach to dete...

So it is in the NGS data base. NEVER rely on a stamped elevation if you can get a data sheet.But indeed there is some disagreement. I'd want more th...

If your OPUS solution is a foot different from the stamped elevation, I wouldn't trust either without further checking. Did the DOT extend from somet...

I suppose they recorded little or no metadata on the old control? You should be able to convert between geoid models if you know which ones the eleva...

Those folks at NGS go the extra distance to do a thorough job. I had submitted a question that they didn't get to in the webinar, and I was surprised...

Gene Kooper, post: 431720, member: 9850 wrote: not intended for the NSRS All 200-plus stations in the Iowa GSVS have NSRS data sheets with PIDs, such...

BushAxe, post: 431622, member: 11897 wrote: I would like to know more about how they arrived at this decision. Here's my guess:They want the 2-ft con...

Mark Mayer, post: 431565, member: 424 wrote: GPS for Land Surveyors. I picked up the Third Edition for cheap, and was quite glad it was cheap because...

I watched it and learned some things even though I've never worked through OPUS Projects. I saw several familiar names from this forum in the list of...

That's Surprisingly, there's also another A 1521 in Texas, AE6984 with a totally different description.

However, I didn't wait long enough for NGS to do their update and my week 1949 session came back with Rapid orbits.

The website I linked above now (Tues 7:30 pm CDT) lists week 1949 precise orbits as available. It was updated some time in the last hour. That's 17 ...