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.

Can I use Grid & Stakeout on my iPhone to adjust the property boundary?

The Grid & Stakeout app will let you manually digitize points and areas over the built-in Apple Map, but not lines. It will let you create grid points and/or grid lines over an Area Feature.

You can use the Stakeout functions and the GPS on your iPhone to help guide you to each grid point. However, the GPS on your iPhone is not quite accurate. Please read our blog article at: http://wp.me/p1v4kh-tf

When you find the stake at a corner, you could use the Pick GPS function to create a point at that spot. If you are using a Stakeout function to get to the stake location, then you can use the Save Result tool to store the new stake point. Then you could use the Move Node function in the “Snap to Node” mode to move a node on the Area Feature to the new location.

Our iCMTGIS III and iCMTGIS PRO apps will also let you insert new nodes into a Line or Area Feature, thus enabling you to make detailed adjustments to an irregularly shaped property.

Marking Property Lines

“I have 25 acres of land and have found all the surveying stakes identifying my property. A number of the stakes are in the bush or a huge ravine so I can’t tell where the property lines are between the stakes. I would like to use the iGPSGIS ll to first record where the stakes are positioned, and then using GPS while walking in the bush / ravine to identify exactly where the property lines are and install fence posts.”

Yes, you can use iGPSGIS II (or iCMTGIS II for iPad) to record the positions of the stakes then create an Area Feature by joining the stake points. Yes, you can use iGPSGIS II (or iCMTGIS II for iPad) to record the positions of the stakes then create an Area Feature by joining the stake points. Or, if you are able to walk to each stake sequentially along the boundary, then you could log an Area Feature in the “Static” mode.

You can improve the accuracy of the recorded position by occupying the location at each stake for maybe 10-15 minutes to obtain an average position. Beware that inherently the GPS in the iPhone is not that accurate. Some users get a mapping-grade Dual XGPS-150, a Bad Elf GPS or Garmin GLO to get 1m – 3m accuracy. For sub-meter accuracy, you could check out the more expensive iSXBlue and EOS Arrow GPS receivers. The iGPSGIS II app can get the positions that these external Bluetooth GPS receivers send to the iOS device.

After you have the area boundary displayed in the app, you can eyeball your position on the map and try to stay on the boundary. Again, the GPS accuracy plays a role here.

Some users use our Stakeout iCMT app to help them get to a point or stay on a boundary line. Stakeout iCMT will report your position (distance, direction) with respect to a target point. It can also be set up to keep beeping as long as you stay on a boundary line.

Meaning of symbols in the stakeout screens

A Deed Calls & Stakeout user wondered about the meaning of the colored arrrows and circles in the stakeout screens.

The large arrow in the GPS marker indicating your current position will be a gray color when your speed is very slow (e.g. less than 1 m/s). The arrow will change to a red color when your speed is above 1 m/s. The direction of the arrow indicates your current direction.

In a stakeout screen, an indicator showing the direction to reach the target is overlaid on top of your current position and is shown as a blue triangle. To reach the target, start moving in the direction of the target so the red arrow aligns with the blue arrow. Alternatively, follow the direction displayed by the app, e.g. Go N: 15.500 E: 20.450 ft. It goes without saying that, if you are driving, please stay on the road. 🙂

On the point stake out or line stake out do we have to use the Antenna height if we don’t know what it is?

If you are only concerned with the horizontal position, the antenna height does not come into play. In any case, GIS-grade GPS receivers do not provide good accuracy in the vertical direction.

Unless your GPS system uses an external antenna, the antenna height is the distance from your GPS receiver to the ground. As the position is recorded at the GPS receiver, if you enter an antenna height, this value will be subtracted from the recorded elevation to bring it down to the ground level.

App to keep cutter on track

“I AM SEARCHING FOR AN APP FOR ANDROID PHONE THAT WILL KEEP MY CUTTERS ON TRACK TO STAY WITHIN OUR CUTTING LIMITS USING GPS GIS UPLOADS. ANY SUGGESTIONS?”

Sorry we do not make Android Apps.

The Stakeout iCMT app for iPhone and iPad provides the Line Stakeout function that can help your cutters stay on track. It does so by constantly displaying the distance from the vehicle to the selected Line or Area Feature.