Can I make use of MRSID files?

Some states, such as North Carolina, provide aerial imagery in the form of MRSID image tiles.

PC-GIS 9 and PC-GIS X can load MRSID files into Map View. It will let you convert the image into a .pim file, which you can load into iCMTGIS III or iCMTGIS PRO.

A geo-referenced image file is accompanied by a “world” file. With the SID images, the associated world file is the .sdw file. With geotiff files, the world file ends in .tfw. When downloading a geotiff or MRSID image, please make sure to download the associated world file to your PC as well. Also, find out which datum/coordinate system was used for creating the image file.

Then, you can use the “L” icon in PC-GIS 9 or PC-GIS X to load the image in the appropriate datum/coordinate system.

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!

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.

Very slow to load Features from Shapefiles

A customer reported that it took a long time to load Shapefiles containing county property lines.

The U.S. county property line Shapefiles typically contain more than ten thousand polygons, along with a multitude of Attributes. As we mentioned in our 10/2/19 blog post, it will take time for the app to process a large job with a huge number of Features and Attributes. The app might also crash if a computation or file saving operation is disrupted for some reason.

Typically, you will want to just load the polygons that you need for a particular job, and not all of them. If you have a PC software program that will let you load the county property lines then let you export just the ones that you need, then please use it to prepare the corresponding Shapefiles for importing into the app.

Some of the iCMTGIS PRO customers use our PC-GIS X to accomplish this. PC-GIS X can import and export Shapefiles. So, the users would load the Shapefiles from the county then select the polygons they need to export to a new set of Shapefiles for importing into iCMTGIS PRO. After collecting GPS data, they would copy the .pmp file to their PC and open it in PC-GIS X. Then they will see the Feature data displayed along with the property lines . They will be able to make some changes, if they wish, then use the Plot Preview function to make a nice map for printing to a PDF file or a printer.

If you don’t need to refer to the property lines in the field, then you could simply load the county property polygons into PC-GIS X and combine them with the field data to complete the map.

Displaying iCMTGIS PRO data in PC-GIS X

“I have a project where I collected points using iCMT GIS Pro and EOS arrow. I would like to export the data points to PC GIS X and make a map with a parcel layer in the background and have the features collected shown with the symbol associated to that data point. Can this be done and if so what is the best way to perform this task?”

Yes, you can import the Shapefiles for the land parcels into your GPS Job file after switching the datum, coordinate system and distance unit in your GPS Job file to that used by the Shapefiles. After importing the parcels, you could switch back to the original datum, coordinate system and distance unit.

Shapefiles export does not retain the symbol and color assignment in iCMTGIS PRO. When you import the Shapefiles into PC-GIS X, the Features will be represented by the default symbols. In fact, you don’t need to export the Feature data to Shapefiles if you will be using PC-GIS X to work further with the Features.

iCMTGIS PRO stores your Feature data in a .pmp job file, which retains the symbol assignment. Simply use iTunes to copy the .pmp file to your PC then use PC-GIS X to open the .pmp file.

PC-GIS X can work with .pmp files as well as .fmp files. The .fmp file will store the Features as well as non-spatial map elements, such as a geo-referenced background map (*.tif) or shapes you’ve drawn using the drawing and lettering tools provided in the Palette. After opening a .pmp file in PC-GIS X, you can save the data in the .fmp format.

If you want to send a Job file from your PC to iCMTGIS PRO, please save the .fmp file as a .pmp file then copy it to the iCMTGIS PRO documents folder. A .pmp file only stores Feature data (including symbol assignment) but not the non-spatial data.

GIS Training Software

“I am interested in buying a GIS training CD. I plan to finish my degree online some time in the future but would like to have the ability to learn about GIS now on my personal laptop.”

Our GIS Training CD is outdated and can only run on XP PCs.

If you have an iPhone to use, it would make more sense to purchase our iGPSGIS II app for field data collection, and download our free PC-GIS DEMO software to view the collected data.

Please download the PDF copy of the iGPSGIS II manual, from which you can learn quite a bit about GIS. You can find the iGPSGIS II Manual under “Help Documents” on the right panel of this blog site.

Capturing Google Earth Pro geo-referenced image using CMT PC software

A customer wanted to know how to capture higher resolution geo-referenced image from Google Earth Pro using his CMT PC software.

In the “Capture Images from Google Earth” screen of our PC mapping software, such as PC-GIS 9 and PC-GIS X, there is an option to capture “Multiple” images. So, if you select a multiplicity of “2 times”, 4 images will be captured (2 times in both directions) thus effectively increasing the resolution by 2.

The captured image can be converted to a .pim file for use on your iCMTGIS II/III/PRO, iGPSGIS II, Forester GPS GIS II/III, Farming GPS GIS II/III and Utility Data Collection apps.