How do I get acreage and Feature ID labels to show up for all of my area features?

The iCMTGIS III, iCMTGIS PRO, Forester GPS GIS II/III, Farming GPS GIS II/III and Utility Data Collection apps provide the Auto Label function on the Topic menu as well as the ability to add acreage as an attribute for a Feature Topic.

First, turn on Topic View and tap on the Topic of interest to highlight it.

Tap on the Topic Menu and select Edit Topic. Tap the Add button and select the built-in Area_Acres attribute from the drop-down list. Tap on OK.

Now tap on the Topic Menu and select “Auto Label“.

In the Auto Label screen mark the “Feature ID” check box and the check box for Area_Acreas in the Attribute List. Tap on OK.

The labels should show up in Map View.

Do you have a simple users manual for figuring out acreage. I am a farmer and I am trying to measure the acreage of various small plots on my iPhone.

The iGPSGIS II app for iPad comes with a Help document under the Main Menu. We also have this document in PDF format that is available upon request.

You can use the GPS data collection function in the iGPSGIS II app to walk the boundary of each farm plot while recording GPS fixes then have its acreage displayed. The app will also let you record other information with each plot (such as the crop name, year planted, etc.). The Feature List (Feature attribute/value database) provides a convenient way to tag Features with pre-defined relevant information during GPS data collection, but it is not necessary to have a Feature List to do a data collection job. The accuracy of the area obtained this way will depend on the accuracy of the GPS receiver used.

Alternatively, if you are able to identify the plots on the displayed Apple Map, then you could zoom into the map, digitize the plots and have the acreages displayed. Please see this tutorial that describes how to digitize a Feature.

See also:

How to digitize an area?
Defining GPS data collection parameters
Setting up the Attributes for a Feature Topic
Expediting data collection
Starting a GPS/GIS data collection job
Collecting GPS/GIS data for a Point Feature Topic

I want to keep my tractor in line and also record the track

You can use iCMTGIS II or iGPSGIS II in conjunction with Stakeout iCMT. iCMTGIS II and iGPSGIS II will record the GPS track in the background while you use the Stakeout iCMT to keep your tractor in line.

With your iPad and a reasonably accurate external GPS receiver, you will be able to use iCMTGIS II or iGPSGIS II to record the locations for points, lines and areas. You will be able to drive around a land plot and map the Area Feature for the land plot. You could record a tractor path as a Line Feature. Or, you could turn on the Tracklog and have the track automatically recorded as you move along.

Stakeout iCMT provides the Point Stakeout and Line Stakeout functions. The Line Stakeout function will show how much you deviate from a path. You can either digitize that path in Stakeout iCMT, or get a previously recorded Line Feature or Area Feature from iCMTGIS II or iGPSGIS II.

When you tap the Settings button in a stakeout screen, you will see the option to display a message and/or issue a beep when you are within the distance specified in the Tolerance field. Therefore, if you set this tolerance value to be 3 ft, then as long as you are within 3 ft of the line you will hear beeps or see a “Target!” message flash on the screen. When you are out of bounds, the beeps will stop and you won’t see the “Target!” message.

That said, the accuracy of the stakeout and the recorded track or Line Feature will depend on the accuracy of the GPS receiver used. For sub-meter accuracy, you will need to budget for a GPS receiver like the iSXBlue II.

iCMTGIS II and iGPSGIS II for farm acreage determination

(Following is our reply to an inquiring regarding using iCMTGIS II and iGPSGIS II for measuring farm fields an groves. We are posting it here as this may be of general interest to farmers who need a simple way to determine acreages using the iPAD and/or the iPhone.)

iCMTGIS II for iPAD and iGPSGIS II for iPhone provide the functionality to easily map and measure areas such as farm fields and groves. These apps will let the users load a built-in Map as the background so they will be able to see the mapped polygons in relation to the surrounding geographic features. The mapped points, lines and polygons can be exported in Shapefile format, which can be transferred to your desktop computer, emailed, or sent out via ftp.

We have been providing user-friendly GPS/GIS data collection software for years to foresters and farmers with minimal computer knowledge. The GPS/GIS data collection functions in iCMTGIS II and iGPSGIS II are based on our Microsoft Windows Mobile FieldCE GIS data collection software, which is widely used by foresters and farmers (such as the American Sugar Beet Seed Association, the OSU Department of Agriculture, farms in California, etc.).

The iCMTGIS II and iGPSGIS II app include a Help document that describes all the functions in the app. Many tips on using the software are also provided at this site. Please check out the July and August blog posts related to data collection. It is rather simple to have your field staff walk around an area to map it. If you want them to also record a description and/or other information for each polygon then you would set up a Feature List and train them to select the appropriate attribute/value to record with the polygon.

iCMTGIS II is listed at $94.99 and iGPSGIS II is listed at $44.99. You could try the less expensive one first.

Please keep in mind that the accuracy of positions and acreage will depend on the GPS receivers used. If your farm acreages or damage areas are small, you may need to employ a GPS system with higher precision, such as our ALTO-G12 GPS data collector, which is much more expensive.