christopherbyrne18 wrote:.... and has an accuracy requirement of about 15mm due to the lining they plan to use.
When it comes to accuracy there are important details to remember. Local accuracy and network accuracy which are not the same.
•Local accuracy (or relative accuracy) represents the uncertainty in the positions relative to the other adjacent points to which they are directly connected.
•Network accuracy (or absolute accuracy) requires that a position’s accuracy be specified with respect to an appropriate truth set such as a national geodetic datum.
This will drive the equipment to be used and the methodology you'll need to complete the project.