Symbol used for representing recorded GPS Features

A customer reported that he had collected a number of points using iCMTGIS Pro and Arrow 100. Although the Topic in his Feature List have specific symbols assigned to them, the recorded points were displayed using the default blue dot symbol.

We have determined that this is a software bug in some of our apps. We will work on fixing this issue. In the mean time, you can click the “Pattern” button to select the desired symbol before storing data.

Is there a way to set a coordinate system as a default in iCMT GIS Pro?

“… most shapefiles and dwg/dxf I use are in NC State Plane. I would like to make that my default.”

If you open a Job in iCMTGIS PRO and set the Datum/Coordinate System to NAD83_CORS96/CSRS98 NC State Plane, and then save the Job, then any subsequent new Job you create will be using the same Datum/Coordinate System.

If an existing Job uses some other datum/coordinate system, the app will not change it to NAD83_CORS96/CSRS98 NC State Plane unless you tell it to. When you save that Job, then that other datum/coordinate system that it’s using becomes the default for any newly created Job.


I need a copy of the help document for iCMTGIS PRO in PDF format

We have placed a copy of the Help documents for our iOS apps at

If you are new to GPS/GIS data collection, please download iCMTGIS II Manual.pdf or iGPSGIS II Manual.pdf from the above site. These manuals provide an introduction to GPS/GIS data collection.

If you are using our PC mapping software on your computer, under the Help tab there is a Online Manual that you can refer to. You will also be able to download the PCGIS.pdf and PCGIS_05.pdf documents from the above link.

Have a Happy and Productive 2020!

Apple Map and GPS Features separate upon scrolling the screen

A couple users reported that when they scroll the screen in our apps, the GPS Features get separated from the map elements in the Apple Map. We have determined that this issue exists with iPhone X, iPhone XR, iPhone 11 and iPad PRO

We reported this issue to Apple in September 2019. The Apple feedback site shows that there are more than 10 other similar reports filed on the site. To date, this issue is still open.

If you use our .pim map image as the background map, then there is no issue. You can use PC-GIS 9 or PC-GIS X to prepare the .pim image files.

Any one interested in getting your GPS/GIS application story published?

GeoConnexion International Magazine is soliciting contributions for their Editorial pages for the March/April 2020 issue. Following are the topics of interest.
Technology: Surveying; GNSS; LiDAR; UAV’s; Indoor Positioning; Location Services
Example Applications: Defense; Military; Aerospace; Energy; Oil; Gas; Mining; Geology; Land Management; Cadastres
Editor’s Choice: Australia

Please send your contributions to Mr Robert Buckley:
Mobile: + 44 (0)7961 843224

In the past we have worked with a couple iCMTGIS III and iCMTGIS PRO users to submit their application stories for publishing. If you are interested in increasing your enterprise’s exposure to the world, one way to do so is having an application story published with the GeoConnexion International Magazine.

How to show contour lines as background image in iCMTGIS PRO

“… I have loaded a shapefile of parcels for a county. I have also loaded the contours of the county. With Edit > Copy, I have been able to select and isolate a specific parcel. How would I do that for the contours just on or around the selected parcel? I would like to clip the contours to show with the parcel whereas Edit > Copy selects the entire contour file. Right now I am getting the parcel only plus entire county contours. As you can imagine the .pmp file size is huge over 280000 KB while the parcel only .pmp is 14 KB.”

Yes, Shapefiles containing contour lines can be huge in file size. As each imported contour line counts as a Feature in our apps, the app will be slowed down a great deal or may even crash while trying to process all these Features.

If the contour lines are just for background reference in iCMTGIS PRO, you can use PC-GIS X to turn the map with the contour lines into an image then crop the part that you need.

For the following steps, please use the same datum/coordinate system as your Shapefiles.

1. Create a new job in PC-GIS X and load the Shapefiles for the contour lines. You can save this job for future use.

2. Use Utilities – Geo-image – Save to Registered Image to save the map image to a .tif file.

3. Create another new job and use the “L” (Load Registered Photo/Image) tool icon to load the .tif file that you’ve created.

4. Copy the desired parcel (Area Feature) from your main job to this new job that contains the contour map image.

5. In the new job, select Utilities – Geo-image – Crop and Save Image.

Click on the contour map image to select it as the Source Image then click on Next.

In the next window, choose “Select an Area Feature“.

Click on the parcel boundary then click Next.

You will be prompted to save the cropped image as a .pim file.

6. Now you can open your main job and use the “L” button to load the .pim file that you have saved. The contour map will serve as a background image in this job.

To use the .pim image in iCMTGIS PRO, you will need to copy it to iCMTGIS PRO then load it as the Background Image.

Which coordinate system should I use to collect GPS data?

“Is this the standard configuration ( WGS 84 LLA ) in iCMTGIS pro? Will it transfer back and forth in different coordinates? Or should I collect data also in NC State Plane since shapefiles are NC SP?”

Internally our software stores location data in WGS 84(1674)/ITRF08.

The options under Setup – Coordinate system is for you to select the coordinate system for displaying the position data.

Many people use the WGS 84(1674)/ITRF08 system on the iCMTGIS PRO because they are familiar with it.

You can set the iCMTGIS PRO to NC State Plane to collect GPS data if you wish to see the coordinates displayed in that system.

The important thing to remember is that when you are combining data (such as by importing Shapefiles), you must make sure that they are in the same coordinate system. You cannot add apples to oranges and expect to get a sum that represents the total number of oranges. In many cases you don’t have the option to change the coordinate system of the Shapefiles at their source. Therefore, our iCMTGIS PRO and PC software provides the ability to switch to the coordinate system used by the Shaepfiles to be imported.

Some people also use geo-referenced images in .tif format. Here again, you will need to find out what coordinate system the .tif file refers to before trying to load it into our software.

For people who make use of data from a RTK network, the Datum must be set to match that used by the RTK base station.