:good: You beat me to it, LOL!
State Plane Coords in general
If SPC ain't getin'er done for ya, then why in the hell are ya using them to start with?
GPS has made SPC obsolete big time, and it can be argued that "they" (SPCs) were functionally obsolete when EDMIs and micro-chips became available to the average Surveyor several decades ago.
SURE...SPCs still have their place (as do UTMs), but IF YOU HAVE to "modify" them, then you probably shouldn't be "using" them in the first place!
B-)
2-bits
Loyal
State Plane Coords in general
Yep
Good point
The error caused by using SPC can probably be absorbed by the error budget in a 200 mile pipeline design. Most road projects calc pavement quantities based on the horizontal plan distance and then build it on the slope and don't blink an eye at the overrun. There is more error caused by that than the grid ground error.
State Plane Coords in general
I'm not following.
Are you saying that a construction project,
in this case a 200 mile long pipeline,
should be calculated, positions annotated, etc
in Latitude/Longitude? or, worse yet, Earth Centered XYZ coordinates?
SPCS allow a fixed, well defined method of expressing positions on the spherical Earth (Lat/Lon)
in a more intuitive square plane grid in feet or metres.
Actually, on these type jobs coordinates are not the desirable working medium.
They are a means to an end, that end being Station and Offset along a "baseline"
made up of curves and tangents.
I could never understand people generating reams of point numbered lists of coordinates
when software allowed you to work on Stations & Offsets directly and pick locations right off the Plans.
Also,
SPCS allow a fixed, well defined method of relating "this job" to "that job" whether they are separated by distance, time or who was doing the job.