Modern Land Surveying Services

A total station would be used for the job site.

Advantage: perform 100% Accuracy

Disadvantage: the instrument is not cheap and is relatively expensive.

Land Management Services

Write letters to lawyers and law firms.

Build fence on concerned land

Aerial Survey Services

Collect geomatics or other imagery
by using drone.

Advantages: Cost effective, relatively low cost. 

Disadvantages: perform only 90% accuracy which is less than total station