This is extracted from an excellent article on absolute antenna calibrations found here: Note as well that the article mentions that while a number of...

Richard, post: 436376, member: 833 wrote: Seeing there's some interesting old maps, these featured here recently. Someone looked at these from modern...

First of all, I would never trust an elevation stamped on a monument. The data sheet in Bill93's post does include all the various stampings on the ph...

I was involved in their program until a few years ago. TAMUCC has two tracks: geomatics and GIS. There faculty includes licensed surveyors.BTW, the li...

If you collected data at a rate other than those listed in the message you received, you can use the UNAVCO "teqc" tool to decimate or interpolate you...

rberry5886, post: 425750, member: 232 wrote: This is from Trimble RTX....print out shows a Z value of 3892968.835m, and the El. Height of 141.832m.......

John Hamilton, post: 425536, member: 640 wrote: GeeOddMike: They said it would be GEOID2022, so I guess that will be the end of the hybrid models.See ...

I wonder whether, now that relations have warmed, data from Cuba have been added to to worldwide geoid modeling efforts? I do not know there is good q...

With respect to the new vertical datum, as the designation GEOID### is used for hybrid models, won't it be either USGG or a new designation for the gr...

Larry Best, post: 425112, member: 763 wrote: base9geodesy,... Just last week I found a NOS disk at about N18-18-59 W 64-46-31, no stamped ID. The plac...

While I did emphasize the large uncertainty in the GEOID12B value, I did not characterize it as error. In fact, looking at the independently determine...

spledeus, post: 424678, member: 3579 wrote: Find the document that states the OPUS solution Ortho Height is VIVD09. Note the geoid issue and that it ...

Note that the text above verifies base9geodesy's statement that OPUS provides an orthometric height based on an NAD83 ellipsoid height and the hybrid ...