App for entering heading and distance information from a platt map

“I want to find and map my property lines, I have 16 acres of woods and wetlands. I have located one survey marker and I have a platt map of my property with headings and distance to the next corner. Which one of your products would let me create a waypoint at the survey marker to use as the starting point and then enter the rest of the heading and distance information so that I can walk and mark my property lines and corners?”

The Deed Calls & Stakeout app will let you stand at the survey marker and get the GPS coordinates of that point as the starting point for entering the deed plot information (bearing and distance). If your deed document uses magnetic north, then you should enter the declination angle for your location into the Orientation field in the app. Then you can use the Line Stakeout function in the app to help you walk and physically mark your property lines and corners. This app works on iPhone and iPad devices.

Keep in mind, though, that the accuracy of your work depends on the GPS receiver used, and the built-in GPS receiver of the iPhone and iPad devices is not that accurate. Some of our app users use a compatible external GPS receiver, such as the Dual XGPS-150A or the Bad Elf GPS, to get 2 – 5 m accuracy. GPS receivers with sub-meter precision, such as the iSXBlue II and EOS Arrow, cost a great deal more.


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.

Which app to use for staking out property

“I’m planning to buy a Geneq SXBlue II GPS Receiver. I need to accurately (more or less 1 meter or if possible less) find the border of my plot in forest in France. I have the Lat + Long of my area as per official mapping. Please can you indicate what could be the application for my job?”

Several of our iOS apps provide the Line Stakeout function, which is what you can use to help you walk/drive along the border of your plot.

The first order of business is to display a drawing/map of the property as an Area Feature in the app.

1) If you have the Lat + Long of many nodes along the border of your property, you could enter them then create the property boundary as an Area Feature.

2) If you are able to identify the property on the displayed Apple Map, you could manually digitize the property. The property being in a forest, this is probably not feasible.

3) If you have a drawing of the property in Shapefiles or DXF format, you could import it into some of our apps. You will need to know the coordinate system (UTM or LAT-LON) in which the Shapefiles or DXF was created.

4) If you have a DXF file of the design drawing that does not reference any known coordinate system, but you have the Lat + Long of two or more points (such as the corners) on the boundary, you could create a local NEZ coordinate system then import the DXF file.

The Stakeout iCMT and Partition & Stakeout apps can do the above 1) and 2). These apps can work on iPhone or iPad.

Farming GPS GIS II and Forester GPS GIS II will do the above 1), 2), 3) and 4). These apps are for use with an iPad only.

iCMTGIS III, Farming GPS GIS III and Forester GPS GIS III will do the above 1), 2) 3) and 4). In addition, these apps can let you import a geotiff file to use as an off-line background image. These apps will only work on an iPad.

All of the above-mentioned apps provide the Stakeout functions.

The iSXBlue II GPS receiver is compatible with an iPad or iPhone. Please contact the GPS receiver supplier to inquire about the accuracy that you can get without any additional requirements (such as being connected to a RTK network).

I have the LAT-LON coordinates of the four corners of a piece of rectangle-shaped property. Will Partition & Stakeout let me place the four corners in the app and help me get to them on the property?

Yes, you can use the Add Point by Coordinates function to add the LAT-LON coordinates of each point into the app. Make sure you enter the North, South, East and West designations correctly. Otherwise the points will end up in unexpected places in the world.
After the points have been created, you can use Point Stakeout to help you approach each point. Or, you could use the Add Area Manually function to form an Area Feature that represents the property then use the Line Stakeout function to help you walk along the boundary of the property.

I’m using the apps for a DIY survey of some land I own …, and to position the proposed location of a building on a site plan.

Using the built-in GPS of your iPhone and the iGPSGIS II app, you can get a rough boundary survey done. If you have the deed description of the property and are able to determine the point of beginning, you could enter it into the Deed Calls & Stakeout app. Then you can position the proposed location of the building.

Please keep in mind that the iPhone does not provide good position accuracy. Your DIY survey can serve as a guide for planning but cannot replace a professional survey. For better accuracies, some of our GIS customers use a compatible Bluetooth GPS receiver. Still, the 1-3 m accuracy provided by these consumer-grade GPS receivers is inadequate for professional survey work.

We wish you success in your project. Please let us know if you have any questions about using our apps.

Customer’s reply: “Thanks. I will be using the new Bad Elf Surveyor so accuracy shouldn’t be an issue for my modest aims.”

Using Stakeout iCMT to stakeout a property

“Although the buying price for the iSXBlue II GNSS is too high for our project, I did find a company in OH, that would rent it too me for a very decent price for a week. . . . . I would like to be able to put in precalculated GPS coordinates (say about 30-50 of them, one every 5-10 meters), on the iPad, and then use the iSXBlue II GNSS and iPad to tell me when I have reached them on the property, so I can physically mark them on the ground. . . Can Stakeout iCMT communicate with the iSXBlue II for some audible or visual help when reaching a preconfigured GPS point?”

If this is the only type of project (i.e. stakeout) that you will be doing using your iPad, you could get the Stakeout iCMT app from the App Store.

You will be able to put in pre-calculated GPS coordinates into Stakeout iCMT on the iPad, and then use the iSXBlue II and iPad to help you physically mark them on the ground.

The steps you will be doing are:
1. Use Add Point by Coordinates to enter the latitude-longitude coordinates of the points. The accuracy of these coordinates is important.
2. Create property boundary line by using Add Line Manually and snapping to the points.
3. Use Line Stakeout to go from one node to the next on the property boundary line.

On Page 17 of the Help document you will see that you can set the distance tolerance for the app to notify you when you get within that distance from the target.

How do I walk the boundary of my property?

A Partition & Stakeout user asked how he would use the app to walk the boundary of his property.

To use the Stakeout functionality to help you walk the boundary of a property, you will need to first place the property boundary in the app. One way to do so is to use a GPS device to record the Area Feature representing the property. This can be achieved by using a GPS/GIS data collection app such as iCMTGIS II, iGPSGIS II or the Utility Data Collection app. Another way is to use the digitization function provided by many of our apps, such as the Partition & Stakeout app.

So, in the Partition & Stakeout app, you would first turn GPS ON, turn the Apple Map on in the Show Hybrid mode and zoom to your property. Then you would select the Add Area manually function from the Tools menu and tap along the boundary of the property to create the Area Feature. You can make use of the Node tool to achieve more accurate digitization.

After the Area Feature has been created, you will see it on the screen. As you move, the GPS marker will move on the screen. You could just use the GPS marker as a guide in walking along the property boundary. Or, you could select the Area Feature as the target Feature for the Line Stakeout function, which will show you how far off you are from the Area Feature and how far along you have moved from the starting node of the Area Feature.