The two programs we used for this project were:
1. Pathfinder Office , a software program designed for data exporting/importing, mission planning, post processing, and other data analysis.
2. ArcGIS, a program designed to create layers that allow you to distinguish between the correct points and the actual points.
Note: For these specific instructions, we used these two programs because we had the most experience with them. These instructions may not work the same for other programs. If you do use these programs, we do hope our instructions are efficient and effective.
The following instructions are to aid you in transmitting your collected data as well as post-processing all or your files in Pathfinder Office and ArcGIS. We hope our instructions help you out in the best ways possible. Good Luck!
Step 1: Transmitting Collected Data Instructions: Steps 1-2
1. Place the GeoExplorer3 GPS unit, containing your collected data, into the module cradle.
2. Connect the cradle to the back of your computer.
Note: The GeoExplorer3 uses a COM1 PORT, but other units may use a USB drive. Consult your user guide for the proper PORT.
Step 2: Transmitting Collected Data Instructions: Steps 3-6
4. Make sure the receiver tab is selected on the "Data Transfer" window and click the "Add" button and select your file.
5. Once you have highlighted the file or files that you want transferred, click "Open". The files you have selected will appear in the "Data Transfer" window.
6. When all files are displayed in the window, click the "Transfer All" button. This will transfer all the selected files to Pathfinder Office .
Step 3: Transmitting Collected Data Instructions: Steps 7-9
8. With the "Map View" open, pull down the "File" menu and select "Open" and navigate to your file(s) you want opened.
9. The locations will appear inside the "Map View" window. If needed, re-size the window by going to the "Data" menu and selecting "Feature Properties".
Once this is complete, continue to follow the instructions to assist in post-processing your points.
Step 4: Post-Processing Your Positions
Open Pathfinder Office , click on the "File" menu and select "Open". Open your file that contains your data.
After the file has been opened, your uncorrected data will show up in the "Map View" screen, as seen in the image.
Step 5: Post-Processing Your Positions
Step 6: Post-Processing Your Positions
• "Coordinate System" and "Zone"
• "System" is set to Latitude and Longitude.
• "Datum" is set to NAD 1983 Conus.
• "Altitude" is set to Mean Sea Level.
• "Units" are set to Meters.
Step 7: Post-Processing Your Positions
Step 8: Post-Processing Your Positions
Note: If your file is not displayed in the window select the "+" sign and select your file from your storage device.
Step 9: Post-Processing Your Positions
Step 10: Post-Processing Your Positions
Step 11: Post-Processing Your Positions
Step 12: Post-Processing Your Positions
Step 13: Post-Processing Your Positions
Step 14: Post-Processing Your Positions
Step 15: Post-Processing Your Positions
Step 16: Post-Processing Your Positions
Step 17: Post-Processing Your Positions
Note: Make sure that your boxes in the “Layers” column are checked. This will allow you to view them.
Red: Corrected positions
Green: Actual positions
Although the post processing program improves your accuracy, it is in no way perfect, as indicated by our example. From the data that we have collected you can see that we had some type of interference, possibly multipath interference, that affected the accuracy of our locations. This is shown by the fact that the red and green points have deviated from each other. Overall, the actual distance to the uncorrected distance would be greater if not post processed.
We hope these instructions were clear, effective, and useful to you. Thank you!