The American Land Title Association and the National Society of Professional Surveyors put together a joint land title survey standard typically referred to as an ALTA. It's a robust standard that is really a good starting point for any title transaction. People like to go nuts checking items on the optional Table A and then wonder why they get quoted huge sums.
Most requirements to use the ALTA standard stem from large commercial investor involvement or Federal agency involvement. These transactions involve a lot of attorneys and the surveyor ends up spending lots of time complying with extraneous requests or fighting them off because they're beyond his ability to certify.
These surveys usually include a detailed topographic survey. A week in the field shooting accessibility ramps adds up fast at $200/hour.
More than you need to know about the standard:
https://www.nsps.us.com/page/2021ALTA