October 6, 2011 Leave a comment
You can use iCMTGIS or iGPSGIS to determine the acreage of a region as follows:
1. Create the Area Feature for the region
You may do so by digitizing the area as shown in our previous article. You will want to load a built-in Map or some other raster image to use as a reference.
If feasible, you could also map the area by walking around it and using the GPS data collection function to record the Area Feature.
2. In Map View, tap the Area Feature to select it.
3. Tap the Feature Properties tool icon (showing a pair of spectacles) then tap the Length/Area button to display the perimeter and area in various units.
Alternatively, in iGPSGIS, select Main Menu, select Utilities then tap the View Area/Length tool to display the length and area information in the lower portion of the screen.
Alternatively, in iCMTGIS, select the Measure tool icon then tap the View Area/Length tool to display the length and area information.
See also: Tony Edwards’ Program Notes