I’m using my set of Reach modules to survey a fence line beyond a set of known corner pins. Nobody knew the fence was so far off until a surveying crew installed two of the pins last fall for a highway project. The original corner markers were wood and are long gone. In total, the neighbours will gain about 5.5 acres form my place and my parents place. My procedure and some images follow. Last image shows my helpers. Notice my one son hiding under my jacket trying to see RTKPLOT on the laptop to see how far away we are from a way-point. If anyone knows of a better way to locate points please let me know. I assume when Bluetooth is working we can use an app on a phone instead of using the laptop. The thing I like about RTKPLOT is that it gives the distance as a grid so you always know how far you need to move.
Actually, I had tried a few other methods first that were based on data from the internet. At first I tried just taking co-ordinates from an online map. Next, I found a way to get a shape file for the parcel in question. I eventually realized this data is not accurate enough for what I’m trying to do.
Here’s what I ended up doing.
- Logged data at newly installed pins located at point 0 and 21 and uploaded RINEX file to PPP site.
- Entered these two points in QGIS to establish a known straight line. They are 392m apart (to give an idea of scale).
- Exported points as UTM10 to DXF file and imported into a CAD program.
- Extrapolated line to were corner should be down at river. Distance taken from old survey plan that I found online. Entire fence length is almost 1500m.
- Imported back into QGIS to add extra points and extract coordinates of points as WGS84.
- Put router at location (1). It’s 14 ft tall. I haven’t got the WiFi hot-spot from a cell phone working yet.
- Setup base station.
- Surveyed point 0 as a check. It was within a few centimetres so I was happy to continue.
- Moved router to location (2).
- Continued to other points until trees became a problem. Will probably wait for logging to happen before going any further.
As a check, because I’m still close enough and the terrain is flat enough, I can see that my new stakes line up with the existing portion of fence between points 0 and 21.