Using NEZ plane in iCMTGIS PRO to stakeout soccer fields

“Is this something your app could help us do with the EOS? . . . We are working with soccer field templates that are interchangeable between any field location. Right now, we have a survey Leica GPS that we can match 2-3 points (usually corners of the field) to the template points. The receiver then matches the rest of the field points. Then we can use navigation to mark the rest of the field. . . . I’m attaching our template pdf as an example and a csv of the points we currently use.”

Yes, we have customers who do geo-referencing and engineering stakeout using iCMTGIS PRO.

The procedure is as follows:

1. Your templates are based on a local coordinate system in the drawing software used for making the templates.

Suppose corner 1 is at (1000, 1000), and the diagonally opposite corner is at (1100, 1200).

You can define a NEZ plane in iCMTGIS PRO by matching the GPS LAT-LON values at these two corners to the (1000,1000) and (1100,1200) NEZ coordinates.

So, you would first record accurate GPS latitude and longitude coordinates at these two kitty-corner points using your EOS receiver. You can use the data collection function in iCMTGIS PRO to record these positions. In the Static Point mode the app will let you stand at each point for 5 or 10 minutes then average all the readings to yield a more accurate result.

To define a NEZ plane in iCMTGIS PRO, first select MENU – Setup then select the distance unit.

Select NEZ. Confirm to set up a new NEZ coordinate system. Tap on Edit.

Enter the plane name of your choice then tap on Control Point.

With “Reference Point” selected as the Control Point, enter the GPS coordinates for the starting point and the corresponding X, Y values. In our example, it would be X = 1000 and Y = 1000. Make sure you specify the correct N, S, E, W designation for the GPS lat-lon.

Now select “Control Point” the Control Point. Enter the GPS coordinates for the other corner and the corresponding X, Y values. In our example, it would be X = 1100 and Y = 1200. Make sure you specify the correct N, S, E, W designation for the GPS lat-lon.

Tap on OK a couple times to go back to main map screen.

2. As you have a text file for the points in your template, you can use Topic Menu – Import TextFile” to import the points and get them displayed in iCMTGIS PRO. If you do not have a text file, you could use the Add Point by Coordinates function in iCMTGIS PRO to add each corner point and enter its X,Y coordinates.

3. Use Setup – Coordinates to switch to the LLA system (lat-lon).

4. Now use GPS – Point Stakeout to mark the points on the ground.