A professional who traces boundary lines of land plots on aerial photographs to determine acreage, using planimeter. Respnsibilities include:

• Centers tracer point of planimeter arm on plot to be measured and places pivot arm at right angle to tracer point.
• Moves tracer point to starting point on photograph according to shape of area to be measured and traces boundary until point of beginning is reached.
• Records figures shown on dial and measuring wheels of planimeter at beginning and ending of tracing and subtracts figures from each other to determine acreage.