Update – December 17, 2008: ExpertGPS User Bob C. Labelling Objects on the Map with their Area Proceed as above to enable the Area column on the Route List. When you are done, select and right-click on the route, and click Close Route. Switch to the Route Tool, and click on each waypoint to connect them together into a route which traces the boundaries of the field. If you have previously used your GPS to mark waypoints at the corners of your field, click Receive from GPS to bring them into ExpertGPS. Follow the directions above, starting with Close Track.Ĭalculating Area of a Field Marked with Waypoints Back at your computer, click Receive from GPS, and ExpertGPS will bring in the track outlining your field. If you need to switch between acres, square feet, hectares, or other units of measure, click Preferences on the Edit menu, and change the Distance Units.Ĭalculating Area from a Recorded GPS TracklogĪnother way you could trace the boundaries of your field would be to take your GPS out and walk or drive the edge of the field, recording a GPS track. ExpertGPS will calculate the area of your field (and all the other closed tracks in the Track List) and display it. Click Select Columns on the List menu, and make sure Area is checked. On the left side of the screen, switch to the Track List. You’d use this command any time you were drawing a field, paddock, or stock pond. This tells ExpertGPS to treat this object as a closed shape. Now switch to the Select tool, and click on the track of your field to select it. When you’ve traced your way around the entire field, press Enter to finish the track. If there’s an irregular edge, along a road or creek, click and drag the mouse, tracing that edge. The track tool draws straight lines when you click. Click once on the corner of your field, and continue clicking at each corner, working your way around the field. Click Show Aerial Photo Map on the Map menu, which should give you a pretty good view of your fields. ExpertGPS will recenter the topo map on your farm. Click Go to Address on the Go menu, and type in the address of your farm. Download and install ExpertGPS, and start the program. The first step is to bring up an aerial photo of your farm. ExpertGPS will automatically calculate the area of any object you draw on the map or mark with your GPS. You can use ExpertGPS to calculate the area of any field on your farm, and you don’t need your own topo map (or even a GPS receiver) to do this. How do I Calculate the Area of a Farm Field? Please forgive my ignorance but I just need an application that would allow me to know exactly the area in a big farm that may have for example, corn or soy, etc. This is the application I need because I have a GPS receiver that does not calculate area but if I understand correctly I can mark different waypoints in my farm (not a perfect square) and then download them to your software and then I get the area? Do I need a topo map of my farm to do this? ExpertGPS has been worth the money for me and my individual uses and I've had good support from their staff.You claim that your software can calculate an area. GPS Trackmaker works differently enough and also calibrates imported images ( though not as well as ExpertGPS because it's only 2 point calibration instead of 3 point calibration on ExpertGPS )Īll that to say. ExpertGPS trackmaking is only like drawing with a pencil - though you can export "routes" to your GPSr as a track. I also use GPS Trackmaker and purchased it because it handles track creation better than ExpertGPS. I've heard other programs do similar things, but since I've already paid for ExpertGPS, I make it do what I need it to instead of paying more money for software that does the same. Even on a recent trip to Oklahoma, I found the ExpertGPS map data to be really lacking compared to the more up-to-date imagery from Google.Īdditionally, I use ExpertGPS to do map plotting for aviation procedure development because I like the way it imports CSV files that I give it from Excel. I don't use the downloaded imagery/topo maps from ExpertGPS because I'm overseas. The reason I bought ExpertGPS was its ability to do better than average map calibration of electronic map images of my own. For folks with ready topo maps available, Google Earth would probably do the trick.
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