Importing a DXF file into iCMTGIS PRO

“Hi I am having trouble loading a file into the unit. . . . My error says that it is required to be in LLA, but I would rather use New York East State Plane. Do I have to convert? If so, how?”

This problem is most likely due to the datum and coordinate system used. Please set up the datum, coordinate system, and distance unit in iCMTGIS PRO to match those used for creating the DXF file then load the DXF file.

If your DXF file was created in LLA, then please set iCMTGIS PRO to WGS84 and LLA. If your DXF refers to a newer WGS84 realization, then select that one.

Load the DXF in iCMTGIS PRO then change the coordinate system to NAD83_CORS96/CSRS98 and State Plane and select New York East State Plane.

The above instruction also applies to other CMTINC apps that provide the DXF import functionality.

After the last app update, the text file export contains LLA instead of XYZ coordinates.

“I have your full license for ICMT Pro but after the latest update when I take my readings with the Arrow Gold and I sent the text file to me it is in coordinates and not decimal, i need the decimal format to use this data within Pix4D.”

Internally the app saves the position data in WGS84(1150) datum and LLA coordinate system. Your coordinate system settings determine how data is presented in Map View and Sheet View.

Please add the built-in Position_X, Position_Y and Elev_Z Attributes to your Point Topic by using Edit on the Topic menu. After switching to UTM, you should see X,Y,Z values in Sheet View, which you can export to a text file.

As mentioned in our 8/16/16 and 9/19/16 blog posts, you can save the app’s configuration file before an app update then restore the configuration afterwards. The configuration file name for iCMTGIS PRO is cmtgispro.cfg.

iCMTGIS PRO updated to version 1.0.4

In version 1.0.4 of iCMTGIS PRO we added a couple additional datum selections: WGS84(1674)/ITRF08 and NAD83(2011).

We have added the Epoch field to the screen that prompts you to specify the datum and coordinate system when you re-import Feature data previously exported in Excel or DXF format.

We have updated the information provided in the section titled “Set up Job & Import Feature Data” in the Help document available on the Main Menu. In particular, please read the subsections titled “Setup Coordinate System” and “Set up GPS“.

Importing DXF exported from Wetland & Stakeout into ArcGIS

“I am having some trouble exporting usable mapping data collected with the Wetland Stakeout App. I have several points, a line, and a polygon that mapped accurately in the field using a sub-foot GNSS receiver Bluetooth connected to my IPAD running Wetland Stakeout. I know the points mapped accurately because before going to the field I loaded the air photo of the site into the APP and all the data looked very accurate while collecting. In addition, I can use the Feature Properties to view the lat/long of each feature and those are as expected. Back in the office I opened the JOB file on my IPAD and exported the data DXF and then emailed the exported DXF to myself to view in mapping software (ArcGIS). When I open the files they have no set coordinate system and fall in on the wrong part of the globe. I have tried defining their projection using ArcGIS and that fails. The Attribute Tables associated with the exported DXF point, line, and polygon files have no location data associated with them. — (1) Am I missing a simple step that allows me to establish a projection/coordination system that carries through the export? (2) Is there a way to export the collected mapped features as KML, GPX, SHP or some other routinely used mapping file? Thanks again, in advance for answering my questions. You folks have been great with your responsiveness to support questions.”

1) The DXF format does not store coordinate system information. Therefore, in the software that you use for viewing the data, you want to select the coordinate system in which the data was saved in order to have it interpret the coordinate values correctly.

Wetland & Stakeout stores coordinates in the WGS84 LLA (Latitude-Longitude-Altitude) system. Please select this system in ArcGIS then open the DXF files created by Wetland & Stakeout.

Also, if the distance unit in Wetland & Stakeout is set to FEET (US Survey Feet), then please select the same unit in ArcGIS.

The user replied: “That worked for me. I just set ArcGIS in WGS1984 with Lat/Long and the exported DXF files dropped in exactly as I thought they would. Thanks again!”

2) The current version of the Wetland & Stakeout app only exports Feature data to DXF. Some users also have our PC-GIS 09 software, and they are able to open the .pmp job file or import the .DXF file into PC-GIS 09 then export in various formats, including Shapefiles, KML, GPX and text files. By the way, Wetland & Stakeout does not provide the ability to load a geo-referenced background map (like Forester GPS GIS II/III, Farming GPS GIS II/III and iCMTGIS II/III/PRO do). The user was most likely using the built-in Apple Map for background reference.

Meaning of working coordinate system in iCMTGIS III

“From the help file exported data will be in the ‘working coordinates’. How are the working coordinates defined? USGS geo tiffs are in UTMs. Does that become the working coordinates; or can decimal degrees or state plane coordinates be selected?”

Before loading the USGS GeoTiffs or importing Shapefiles, you will want to select in iCMTGIS III the same coordinate system as that used for creating the USGS GeoTiffs or Shapefiles. Please also make sure to select the proper distance unit.

After loading the USGS GeoTiff or Shapefiles, you can switch to another coordinate system of your choosing, such as SPC.
If you want to see angles displayed in decimal degrees, then under Setup select Elevation and Angle then select Degrees.

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:
http://wp.me/p1v4kh-lu

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.