Okay, here's a serious question for the GIS/GCDB experts:
The BLM “PID” (Point identification ID) used by the GCDB system is explained in the link below:
Okay FINE! It's a SIX-digit code that works dandy when there is ONLY ONE [say] Northeast Corner of Section 10. What the linked document FAILS to address, is situations where there are TWO (or MORE) Northeast Corners of Section 10.
YEAH...I know...that isn't supposed to happen, but it DOES!
We have been asked to furnish these BLM-PIDs on an ongoing project that contains a LOT of these double corners (about a Townships worth).
Both of these Monuments/Corners evidence Approved GLO Surveys (1850s & 1880s/90s), and BOTH of these corners CONTROL Federal Patents, and BOTH of these Corners have been used historically to build fences, convey land, etc. etc. In other words, THEY have BOTH been relied upon at one point or another, and in some cases BOTH still are (but that's a whole 'nuther' problem).
So in the case of the NE Cor. of Section 10, the BLM-PID would be 500600. Well what about that “other” NE Corner of Section 10 (situate some 479 ft. North, & 249 ft. East of the Original Corner)????
507604 (proportioned PID)????
I dunno...I like 500600(a) & 500600(b) but that ISN'T SIX digits!