These types of survey can be Raw Land Surveys or As-Built Surveys. Consisting of the layout for the construction of a new tower, either self support or guided towers. The Mean Sea Level (MSL) elevations, State Plane Coordinates (SPC) and Latitude/Longitude of the Proposed Tower and/or As-Built Tower locations are determined, along with the placement in relations to the parent tract. 1A or 2C Certification Letters, are usually requested at the same time and are issued to FCC for their approval and administration.I'm a paragraph. Click here to add your own text and edit me. It's easy.