Well at least we're not agonizing over the infamous 4 hundredths (0.04 ft.) this time around.?ÿ?ÿ
🙂
There vs. their is likewise an act of extreme incompetence that does not prevent the product from being used as intended.
I agree though, that if a surveyor calls for a particular coordinate system professionalism demands the survey to actually be in that system. My question is why bother calling for state plane to begin with?
Incorrect meta data is of course not acceptable. But we should be leaders in the field of geodetic positions, we shouldn't blindly follow what the GIS technicians think they want. AcrGIS can use true geodetic coordinates just as well as we can.
Incorrect meta data is of course not acceptable. But we should be leaders in the field of geodetic positions, we shouldn't blindly follow what the GIS technicians think they want. AcrGIS can use true geodetic coordinates just as well as we can.
There were two very big construction projects in Pittsburgh in the mid to late 80's-90's, and the mapping was done by the same company (Michael Baker). One was a light rail project from downtown to where I live, and the other was a new airport terminal. Once GPS came along someone noticed that coordinates were off by 100 feet or so, and they asked me to look at it. I determined that they had scaled it to ground from 0,0, but never noted that on the plans. No one really noticed or cared until GPS was used to bring in control from outside the projects.?ÿ
While I don't agree with this approach for scaling projects (the PA turnpike does this often as well), it is not a major problem IF there is METADATA explaining it. Big if. Metadata often gets separated from the data.?ÿ
That was a time when ONLY surveyors measured on GRID. Today many more people out there measuring and assuming the black box is always correct. Lot's of Engineers and contractors using GPS now. I can see one of them performing test bores, drilling wells, and soil samples, then using Network RTK to show locations in NAD83(2011)(EPOCH:2010.0000) Grid Coordinates. In this case (on an 800-acre landfill), the Engineer would be on "a" correct datum, yet the location will be shown in the wrong, or not relative to the survey data.