Stakeout iCMT or iCMTGIS III, which one to get for placing moorings?

“We intend to use the Arrow to place moorings in our mooring grid… I was looking at iCMTGIS PRO, but thinking that is much more than what we need. I rather start with the simpler program if it will give us what we need, experiment with your apps before purchasing the more expensive one, if it even would make a difference.”

This customer is using the Stakeout iCMT. It looks like he will need to switch to iCMTGIS III because of the following reasons:

1) He needs the ability to import point data in GPX format.

2) He needs to have coordinates displayed in decimal degrees rather than in DMS.

3) He needs to work in the “moving map” mode, in which the background map will be rotated so that the boat always points to the top and then a compass is pointing the direction you have to go.

4) He wants the mooring points to be labeled with their names on the map.

5) He does not require land surveying accuracy.

Besides, iCMTGIS III also provides the ability to record Points, Lines and Areas using GPS, as well as the ability to create the mooring grid points over an area. It will not only let you work with latitude and longitudes, but also with State Plane, UTM and user-defined coordinate systems.


How to zoom in in Stakeout Mode?

“Wow, yes turning off map I can get more zoom. But how do I zoom when in stakeout mode? Or does that work with map off? I get that error sometimes still that says: ‘only point or line or area can be selected’, when I try to zoom.”

In Stakeout mode, the fields are waiting for your input. If the cursor is at the stakeout target field, a tap on the screen is interpreted as a Feature selection. When you want to work with the map (like zooming in or out), please remember to have the Cogo icon and the Apple Map turned off.

If you have a geotiff Background Map loaded (as in iCMTGIS III or iCMTGIS PRO), it does not affect the zoom.

First Node for the CMT Deed Calls function

“I entered in my lot information, and your app was accurate in the square footage to within less than an inch. However, the location on the map is off by several hundred feet.”

The deed plot in the Deed Calls & Stakeout is drawn based on the location of the First Node. Do you know the LAT LON of your point of beginning?

You could use the Pick GPS function to get a rough location, the accuracy of which is based on the GPS receiver used.

Please also read the following article at our blog site:

After you have specified the correct location for the First Node, the entire deed plot will be moved to the correct location.

Another thing to note is the Orientation. If your deed calls are based on magnetic north, then please enter the magnetic declination for your location into the Orientation field.

“Thanks. I was out today and found one of the original corner marker iron pipes, so now I have the exact location to use as my first node.

I was amazed at the accuracy of your program. It had the square footage identical to the figure on a plat map to within 0.45 of a foot.

I am using it to find the property lines of out lot. We have been here 37 years and have a wooded lot, and I just want to be sure I know where the boundaries are. So now is the time to do this, before the brush grows.

I bought your App to do this as a surveyor wanted $3,500.00 to do it, even though I did not need a plat map submitted to the county.

Thanks again for the great support.”

Stake out using iPhone device

“I search application to stakout a polyline with my iphone. I see you make this for ipad but i don’t see for iphone.”

The Stakeout iCMT app can run on iPhone and iPad devices.

If your polyline is stored in a DXF file or as Shapefiles, you can import it into the “Stakeout iCMT” app and let the app help you stake it out.

The accuracy of your work depends on the GPS used. The iPhone GPS is not quite accurate. You can get a compatible external Bluetooth GPS (such as Dual XGPS-150A or Bad Elf GPS) to achieve about 2 – 5 m horizontal position accuracy. High-precision GPS receivers will cost a lot more than these GIS-grade GPS receiver.

iPhone app for mapping property lines

“I just purchased the Stakeout ICMT app for my iphone. . . . I thought this was the app that worked with your iPhone GPS to walk the property line. But from your email it sounds like there is another one. What is the app called? Is there any way I can get a refund for this app and purchase the other one?”

Stakeout iCMT can help you approach an existing Point or walk along an existing Line or Area Feature in the Job file. It assumes you can import or digitize the Features to get their coordinates.

You could, if you wish, use the Add Area Manually function in Stakeout iCMT and log nodes for an Area Feature by tapping the PickGPS button once every few seconds while walking your property boundary. However, this is not how GPS mapping is usually accomplished.

Our iGPSGIS II app for iPhone provides the GPS mapping capability. While you walk around the property, you can have the app automatically log a GPS node every second.

Please note that the accuracy of your work will depend on the precision of the GPS receiver you use. The built-in GPS in iPhone is not that great (unofficially, around 10 meters). Some of our customers use the Dual XGPS-150 or the Bad Elf GPS 2200 to get 2-5 meter horizontal accuracy.

As these apps are sold via Apple, please contact Apple App Store to inquire about switching out an app that you purchased recently.


“I’m hesitant to spend $300 for the pro app if the $95 or $200 apps will suffice but I’m having a difficult time finding a comparison of features among the apps.”

Built-in Attributes 512x384

The three apps in the iCMTGIS-series all provide real-time GPS/GIS data collection and mapping functions. They will let you add user-defined Attributes for the recorded Features either manually or via a Feature List (attribute table). They will let you import and export Shapefiles. The differences are in the additional functionality provided by the more expensive apps.

If you just need to use GPS to map Points, Lines and Areas and record their associated descriptions, iCMTGIS II will do. iCMTGIS II can display the built-in Apple Map as background. If you would like to use an off-line geo-referenced background image, you will need to first use the optional PC-GIS software to convert the GeoTiff, GeoJpeg, ECW or MRSID files to the .pim file format. The .pim map can work in the “moving map” navigation mode. (Many of our existing customers already have the PC mapping software.) iCMTGIS II only works on an iPad device. Its iPhone equivalent is the iGPSGIS II app.

iCMTGIS III and iCMTGIS PRO can run on iPad and iPhone devices. These two apps will let you load a GeoTiff image or a .pim image as background map. They also provide a built-in Attribute List from which you can choose as additional Attributes for the Features. One of the screen shots displayed here shows the current list of built-in Attributes that you may elect to include in the data records for the Features recorded using GPS. Other additional functions are also provided in these apps, which help you stake points/lines/areas, create Features by entering distances and bearings, as well as classify, sort or perform a search on the Features in a Topic layer, import and export Point Features via a text file, etc.

GPS surveying using iPhone

GPS surveying using iPhone

iCMTGIS PRO has all the functionality of iCMTGIS III plus the Contour/Volume and Create Buffer functions. What sets it apart from the other two apps is that it provides the ability to receive the NMEA message stream directly from a few specific external GPS receivers. When the “Enable the External GPS” option is selected, iCMTGIS PRO will get the GPS information directly from the external GPS receiver rather than the iOS CoreLocation. This enables it to display a GPS status bar in real time.

At this time, EOS Arrow GPS receivers and Geneq iSXBlue II + GNSS can work in the “Enable the External GPS” mode. To use the EOS Arrow 200 and iCMTGIS PRO for RTK work, you must use the free EOS Tools Pro app to connect to the RTK network.

How to advance to the next point to stake using iCMTGIS Pro?

“I remember in CMT Field Survey on the PC-5 I could select Next and it would take me to the next point to stake. It doesn’t seem to function
this way in iCMTGIS Pro. In iCMTGIS Pro, there’s a Node field with an arrow, but it doesn’t advance the user to the next point to stake.”

In iCMTGIS PRO and some of our other apps, the Point Stakeout function will let you stake any Point Feature or any node on a Line or Area Feature. For a Line Feature you can enter the Node number in the Node field, or tap the arrow to advance to the next node on the Line or Area Feature.

Therefore, to stake one Point Feature after another, you could first join the Point Features into a Line Feature in the order that you wish to stake them, and then select the Line Feature as the target for the Point Stakeout function. For example, to visit the plots sequentially while cruising a stand of timber, you could join the plot centers into a Line Feature then make use of the Point Stakeout function.