iPhone app for locating fence line and property boundary

“I have a ranch in Colorado that is relatively isolated. When at the ranch, I do not have internet or phone service. The property has metes and bounds descriptions for the boundaries. I am interested in acquiring your software application to confirm the location of fences and the property lines. Will this app function on my iPhone without internet access? Will the Deed Calls and Stakeout App perform the functions that I need to identify boundaries?”

You do not need Internet access for our apps or the GPS on your iPhone to work.

The Apple Map does need Internet access to be refreshed. However, you could load the Apple Map while you are at your office and cache it for use on site.

Some of our apps, such as the iCMTGIS III and iCMTGIS PRO, will let you load a GeoTiff map to use as an off-line Background Map.

The Deed Calls & Stakeout app will let you input the metes and bounds descriptions to draw the boundaries. For the boundary to be correctly placed on the map, you will need to provide an initial position and the your local magnetic declination angle.

Then, you can select the boundary and use the Line Stakeout function to help you walk along the boundary to confirm its location.

Please be aware that the iPhone GPS is not very accurate. An external GPS receiver such as the Dual XGPS-150A or a Bad Elf GPS can get 2-5 m accuracy. There are also expensive external GPS receivers that can provide sub-meter or even cm-level accuracy.

Does Farming GPS GIS III need wifi or cell service?

“Will this app allow me to plot a lines in my field and then allow me to follow them with a sprayer manually? Does It work without wifi or does it need cell service?”

Farming GPS GIS III provides the functionality for you to digitize Points, Lines and Areas over a displayed map. It also provides the Line Stakeout function to help you stay on the line while spraying.

Our apps do not need cell service.

The Apple Map that the Farming GPS GIS III uses needs wifi to load. You can load it at the office then use it in the field where there is no wifi as long as you do not close the map in the app.

Farming GPS GIS III will let you load a geotiff map (*.tif) to use in the background. Such off-line maps do not need wifi.

The accuracy of your work will depend on the GPS used. Many users get an external GPS receiver to use with their iPad devices. GIS grade GPS receivers claim 2-5 meter accuracy. High-precision GPS receivers are quite costly, but they can get down to sub-meter or cm-level accuracy.

Question about Contour – Volume – Stakeout

“Does this app calculate the Contour and elevations based on Google satellite Aerials or do you need additional equipment in the field to be able to measure the different elevations?”

The Contour – Volume – Stakeout app will plot the contour based on the elevation data you enter or import. You will need to supply the elevation data.

Our iCMTGIS PRO app provides the GPS mapping and data collection functionality for recording 3D position data. You will need to use a compatible high-precision GPS receiver (such as the SXBlue Platinum or the EOS Arrow Gold) to obtain accurate results. iCMTGIS PRO also provides Contour-Volume functionality.

We do have software (e.g. PC-GPS 9, PC-MAPPER 9, CMT-Forester) for use on a Windows 7, 8 or 10 computer that will plot contours based on DEM (Digital Elevation Model) data provided by the NGS.

EOS Arrow 100 Case Study

If you missed Håkan Bergstedt’s article published in the March/April 2018 issue of the GeoConnexion International Magazine, here is the link to an in-depth write-up posted on the EOS website.

https://eos-gnss.com/mittnorr-land-boundaries/

When faced with the challenging task of finding survey markers or boundaries in an area overgrown with thickets, think iCMTGIS PRO and a high-precision GPS receiver such as the EOS Arrow 100.

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:

https://icmtgis.wordpress.com/2016/06/18/i-have-my-deed-with-the-property-description-but-i-am-not-sure-where-or-what-to-exactly-enter-into-deed-calls-stakeout/

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.”