For a good summary of NAD27 and related issues, I recommend Joseph Dracup's For comprehensive discussion of why NAD27 was replaced see As for the...

@mathteacher t - T correction is the arc-to-chord correction. Surprised that no one has referenced James Stem's SPCS 83 manual located here: ...

While old, I’m not old enough to have any experience with this instrument. I believe it is the one designed by Fischer. A link to the NOAA Photo colle...

see EM 1110-1-1003 NAVSTAR GPS Surveying free PDF I find the USACE manuals to be useful as they are written to teach often under prepared learners. ...

REMINDER --> The next NGS Webinar is March 9, 2023 on CORS Installation, Operation, and Maintenance Best Practices

Sorry to be serious but why is there no recognition of the water usage differential between toilets and urinals? The water savings of well-maintaine...

There is an NGS webinar scheduled for 9 March 2023 which will address CORS installation, operation and maintenance. This would be a great opportunity ...

@john-hamilton My view is that UNAVCO is to be commended for supporting Dr Lou Estey in the development and maintenance of teqc. The tool required a...

My previous post indicated the software is NOT free. It can be free if you are engaged in a scientific study and NOT used in “routine work.” In any ev...

I too lament the demise of UNAVCO’s teqc tool. I copy a poster presented at a SIRGAS meeting showing a comparison of teqc and two other tools: GFZRN...

@rj-schneider It has a long time since I used MTEN. The link you provide is to a suite of programs developed to perform reductions/computations of c...

Had some family in New Bern (since relocated). Lovely town. Too prone to flooding for me. Back in the 1980s used to windsurf on the Sound near Nags ...

The system was developed to support emergency personnel and similar to the MGRS. The USNG values are included on NGS data sheets as shown here:

You might consider the USACE manual here: Or others linked from here:

@cliff-mugnier The NOAA Corps consists of officers only; there are no enlisted members. There are neither LDOs, Restricted Line nor Warrant Officers...