User-defined projections

“. . . we would like to know by PC-GIS software possible to establish our Coordinate system (KTM Projection and GRS 1980 Datum) to use it in iCMTGIS Pro software?”

The KTM-KUDAMS projection for Kuwait is based on the Transverse Mercator projection. You can use the PC-GIS X software to create a user-defined coordinate system by entering the parameters for this projection. Then please copy the user_cor.sys file created by PC-GIS X to your iCMTGIS PRO documents folder. Then iCMTGIS PRO will let you select the user-defined coordinate system to use.

Sweden needs help

“We are trying your app iCMTGis II for ipad but we use the coordinate system SWEREF99TM is it possible for us to project in this system so that we can use our own shapefiles from ArcGiS, i.e. do your program convert shapefiles or do we need to change the coordinate system and how do we do it? Secondly we have major difficulties to import shapefiles, eventhough we can see them in the app in Itunes, they do not show up in the import.”

1. Coordinate system
In ArcGIS, please switch to a standard coordinate system (such as LLA or UTM) then export the Shapefiles. In iCMTGIS II, set the coordinate system to be LLA or UTM accordingly. Then import the Shapefiles into iCMTGIS II.

If you wish to use the SWEREF99TM in iCMTGIS II, you could use our PC-GIS PRO 09 software to set up a user-defined coordinate system then copy the user_cor.sys file (with the file name in lower-case letters) from your PC to the documents folder for iCMTGIS II on your iPad device.

2. Shapefiles import
Please make sure all the associated files have been copied to the Documents folder for iCMTGIS II (*.shx, *.shp, *.dbf, *.prj). The file names should be in lower-case letters and numbers. The procedure for importing Shapefiles are discussed in our blog article at:

Also, please check your iCloud setting under Main Menu/Setup.
If the check box for Job is marked, the app will look for the .pmp job files and the Shapefils in iCloud storage. To see the files in your local documents folder, please un-mark this check box then tap the OK button.

The above information also applies to the iGPSGS II app for use on the iPhone.

I just downloaded the new app for the Ipad (Forester GPS GIS App). Could I get the user defined Michigan Georeference coordinate system patch?

You have already created the user-defined coordinate system for Michigan in your CMT-Forester 10 PC software. Information for user-defined coordinate systems is stored in the user_cor.sys file.

To make the user-defined coordinate systems available for use with the Forester GPS GIS app on the iPad, simply copy the user_cor.sys file from your PC to the documents folder for the Forester GPS GIS. If you have user-defined datums as well, then also copy user_dat.sys to the app’s documents folder. If you have defined plain NEZ coordinate system using your PC software, then also copy user_pla.sys to the app’s documents folder. Please change the file names to be in lower-case letters before copying them to the iPad.

iCMTGIS II, iGPSGIS II, Utility Data Collection, Forester GPS GIS, Forester GPS GIS II, Farming GPS GIS and Farming GPS GIS II provide the ability to use various standard coordinate systems as well as special coordinate systems defined by using our PC mapping software. These apps will also let you define a local NEZ plane in the field.

Can you add POSGAR94 for Argentina to the iCMTGIS II software?

POSGAR94 Zone1

iCMTGIS II and iGPSGIS II can work with a user-defined coordinate system that you have defined using your PC-GIS PRO. Shown here is the screen for entering the projections for Zone 3 for POSGAR 94. You can follow this example to enter the parameters for the other Zones, which differ in the Central Meridian and False Easting values.
After you have entered the data for the seven Zones, change the name for the User_cor.sys file in the PCGIS9 folder on your PC to be in lower-case letters. Then use iTunes to copy the user_cor.sys file to the Documents folder for your iCMTGIS II or iGPSGIS II. In iCMTGIS II or iGPSGIS II select Setup – Coordinate System then select User Defined to access the new coordinate system.

What is a user-defined coordinate system?

The LLA and UTM coordinate systems are generally accepted coordinate reference systems worldwide. However, some states in the USA, such as Michigan, Mississippi and Oregon, adopt their own plane projection as a standard spatial reference for their state agencies to present their spatial data and maps. Other regions in the other countries may also have their own  spatial projection standards.

PC-GIS, PC-GPS and PC-MAPPER will let you define your own datum and enter the specifications for a projection plane  based on the Transverse mercator, Mercator, Oblique mercator, Lambert conformal conic, Albers Equal Area conic, Double Stereographic projection. The user-defined coordinate systems are stored in the file named user_cor.sys. You can add this file to the Document folder for the iCMTGIS or iGPSGIS via iTunes. Then your user-defined coordinate systems will become available in the iCMTGIS and iGPSGIS apps, and you may select one of them as the active coordinate system.