![]() ![]() (North American Datum survey recorded in 1983. ![]() typically a state plane coordinate system) more than likely using the NAD 83 survey. ExpertGPS is a powerful software application that was designed to allow users of Garmin, Magellan, and/or Lawrence GPS systems to view and edit their waypoints, routes, and tracks. So your best bet is to use the transformation (survey term used for move, rotate and scale) method Murphmap suggested by finding out what the Northern (Y value) and Easting (X value) and move your drawing entities from a known point (in this case the Northeast Corner of Section 20) to the new point that you will obtain which will have a real world coordinate value based on a known coordinate system (i.e. ExpertGPS: Take complete control of your Garmin, Magellan, or Lawrence GPS system with this convenient and easy to use application. They also probably used a theodolite (old school surveying instrument) and not a Total Station (or one of the more current instruments to do surveying like a kinetic or static GPS) to collect data for that survey map which is why they used solar observations which is the way they determined a basis for bearing line on old surveys. The reason I say this is because they more than likely used a known point (the NE Corner of Section 20) and used solar observations from that point to determine the bearing of the line used as a Basis of Bearing in the survey. Before copying and pasting the coordinate data from Excel into ExpertGPs, I followed these instructions for adding a new coordinate format to ExpertGPS, and selected degrees and minutes (hddd mm.mmmmm) and the WGS84 datum. More than likely your working with a drawing (the original pencil drawing that is) that is based on a local (or assumed) coordinate system and not a state plane coordinate system. Download version 3.09 (or later) of ExpertGPS mapping software to convert this data. I assume my first step it to set this up on the correct coordinate system, but are unsure of what that is and/or how to do so. Make sure that your Garmin or Magellan handheld GPS device is connected to your computer using your USB or Serial port connector, and that your GPS device is. ![]() It has below it "ALL BEARINGS BASED ON TRUE NORTH DERIVED FROM A SOLAR OBSERVATION TAKEN AT THE NE COR OF SEC.20". The drawing is rotated to where the north direction is rotated 54degrees. What I have is a survey drawing that was put into AutoCAD (what version, I do not know) many years ago. ![]()
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