Notifications
Clear all

Strange plan reproduction

9 Posts
7 Users
0 Reactions
1 Views
(@stacy-carroll)
Posts: 922
Registered
Topic starter
 

This is one I havenƒ??t seen before. We staked to an as-built point that we shot two or three years ago and couldnƒ??t figure out why the coordinate on the planset was wrong. It appears that one digit is different between our issued map and their sheet that included a scanned image of our map. So, we dug until we found the wet signed file copy. On the two images Iƒ??m uploading, point 3710 is the issue. One image from our file copy and the other from the construction plans. I cut out the first few digits for discretion. Anyone have a clue what happened?

 
Posted : October 20, 2017 12:16 pm
(@frozennorth)
Posts: 713
Registered
 

I wonder if the construction plans somehow relied on OCR of the numbers on your original map to create their plan sheet??? Seems like a stretch, though.

 
Posted : October 20, 2017 12:28 pm
(@a-harris)
Posts: 8761
 

Looks like an OCR error. (scan to text)

FrozenNorth got there 1st

 
Posted : October 20, 2017 12:33 pm
(@jim-in-az)
Posts: 3361
Registered
 

Looks like an OCR issue, but it is VERY strange that would be the only "6" read as an "8"... Weird.

 
Posted : October 20, 2017 12:45 pm
 ddsm
(@ddsm)
Posts: 2229
 

The Design Engineer (or Draftsman):
1. Didn't know how to import dbf, excel, comma delimited, or clipped images
And
2. Transcribed your values wrong.

OCR would be rare for this to be the only 'mistake'.

DDSM

 
Posted : October 20, 2017 12:48 pm
 vern
(@vern)
Posts: 1520
Registered
 

Dan B. Robison, post: 451843, member: 34 wrote: The Design Engineer (or Draftsman):
1. Didn't know how to import dbf, excel, comma delimited, or clipped images
And
2. Transcribed your values wrong.

OCR would be rare for this to be the only 'mistake'.

DDSM

Could be the only mistake not caught.

 
Posted : October 20, 2017 1:34 pm
(@stacy-carroll)
Posts: 922
Registered
Topic starter
 

We're going to try to find out for sure what happened. We do know that what was sent out had the right number since the contractor saved his copy from the previous phase and it matches our file copy. Somewhere between phase 1 and 2 plans (we issued once prior to phase 1) something happened.

 
Posted : October 20, 2017 5:35 pm
(@christ-lambrecht)
Posts: 1394
Registered
 

I remember Reading aan article Some years ago ... it pointed to a glitch in the scanning/copy software ... was a bad thing for bankers

https://www.theverge.com/2013/8/6/4594482/xerox-copiers-randomly-replacing-numbers-in-documents

 
Posted : October 20, 2017 10:55 pm
(@stacy-carroll)
Posts: 922
Registered
Topic starter
 

christ lambrecht, post: 451912, member: 284 wrote: I remember Reading aan article Some years ago ... it pointed to a glitch in the scanning/copy software ... was a bad thing for bankers

https://www.theverge.com/2013/8/6/4594482/xerox-copiers-randomly-replacing-numbers-in-documents

Sounds like a bad thing for surveyors too!

 
Posted : October 21, 2017 10:12 am