Ngs Pid's Question

[+bicknell]

Is there any reference to what the first two letters of an NGS PID mean?

 

Locally I've found JV seems to be a NGS disk, an AE seems to be a temporary identifier. However there are a dozen other types in my download. It would be nice to sort these out quickly.

[+Kewaneh & Shark]

There IS a rhyme and reason to the PID alphanumeric nomenclature. Generally, the naming convention follows a grid-type system set out across the United States. A better explanation can be found in these threads:

 

Pid Is Not Point Id

 

and

 

Naming Of Stations

 

Hope this helps.

 

- Kewaneh

[evenfall]

Bicknell,

 

PID

DATA ITEM: Station Permanent Identifier (PID)

DISPLAYED: Always

COMMENTS : The PID is also found on the left side of each datasheet record.

The PID is always 2 upper case letters followed by 4 numbers.

EXAMPLES :________________________________________________________________

AA3495 PID - AA3495

RF0849 PID - RF0849

TV0007 PID - TV0007

 

DESIGNATION

DATA ITEM: Designation

DISPLAYED: Always

COMMENTS : Usually the DESIGNATION does not match exactly with the STAMPING.

EXAMPLES :________________________________________________________________

AA3495 DESIGNATION - GAITHERSBURG CORS L1 PHASE CENTER

RF0849 DESIGNATION - CARIPORT

CA0570 DESIGNATION - MP 77-5015

AA8531 DESIGNATION - 66-26

 

And By Roger, Rogbarn, a fellow benchmark hunter, a grid sheet he developed, based on the Latitudes and longitudes of the US and how the NGS Prefixes would overlay each area, Have a look at it Here.

 

There is a graphical look at the same thing, hosted by sbolish, Here.

 

Enjoy,

 

Rob

[Bill93]

Note that the grid system seems to have been abandoned for new marks set since the data was computerized. THey have issed them all over the country in the AA to AF range or so.

[+Colorado Papa]

Is there any reference to what the first two letters of an NGS PID mean?

Yes!

Take a look at this PID map that was generated by fellow benchmark finders. However, there are some exceptions. Prefix AA, AB, and others can be found in locations everywhere. Most of them were installed after 1981.

[evenfall]

Ted and Bill,

 

You make good points. The PID system was developed for use with Computer Data Filing, The "A" series marks are Miscellaneous marks which often include but are not limited to GPS Control, HARN, CORS, Primary and Secondary Airport Control, as well as other geodetic projects and measurements. The rest of the system is not abandoned, however in some cases and places many of the numbers are used up. This can also serve as an overflow for that, and in some cases does.

 

Rob

[Bill93]

Does anybody have an example of a recently set mark that still follows the grid system? All of them that I have found that were set in the last 10 years or so seem to be in the A series.