Common Questions

What types of geodatabases are supported with Trimble Positions?

Personal, file and enterprise geodatabases as well as ArcSDE services.

What types of GNSS receivers are supported with Trimble Positions?

The list differs slightly for the two products (Trimble Positions ArcPad extension, Trimble Positions Mobile extension) and can be found here by scrolling down to the ‘Technical Specs’ section.  In general, it consists of all current Trimble Mapping & GIS handhelds and receivers.

Where are the log files stored for Trimble Positions desktop applications?

for v10.1.0.2 on Windows 7:


for v10.1.0.2 on Windows XP:

C:\Documents and Settings\<user>\Application Data\Trimble\Positions\10.1

for v10.1.1 and earlier on Windows 7:


for v10.1.1 and earlier on Windows XP:

C:\Documents and Settings\<user>\Local Settings\Application Data\Trimble\Positions\10.1

In the Mobile Project Center extension, why does the checkbox next to TrimbleSessions keep un-checking itself when I save my project?

The checkboxes next to the layers indicate layer visibility.  When you save the project, the Trimble Positions MPC extension will automatically uncheck the entry for TrimbleSessions.  We felt it would provide only minimal value and likely confuse things to have this layer visible in the field and so we hide it by default.  You would see nothing more than the extents of each session if it were visible.  Layer visibility can also be controlled from within the mobile application by clicking Menu…Layer Visibility.

Do I need to ‘GNSS Enable’ my geodatabase and map document (MXD) for ArcPad-only workflows?

No. GNSS enabling (the creation of the TrimbleSessions feature class and layer) is only required for the ArcGIS for Windows Mobile workflow.  One caveat here however…by GNSS enabling your MXD you are ensuring that a transformation is selected in the case where your data collection layers are exclusively non-WGS84.  The TrimbleSessions layer will always be in WGS84 and thus adding it to your MXD (through GNSS enabling) will prompt you to select a transformation.  So if you are using the ArcPad workflow and elect not to GNSS enable your MXD, you will need to use the ‘Datum Transformations’ functionality within the Administration window in order to define a transformation from WGS84 to your working coordinate system.

What does the ‘Set MXD’ button in the Projects area of the Administration window do and do I have to use it?

This is used to link the selected Trimble Positions project to the currently open MXD.  You can only link a project that was created from the same workspace (e.g., geodatabase) that the layers in the current map document originate from.  Linkage is an optional step and only affects the ‘auto load’ behavior of a Trimble Positions project.  Whenever you open a new MXD, the Trimble Positions Desktop add-in will look for projects linked to the MXD (by name only and not full path) and if it finds any, will automatically load, or open, the first one it finds.  You can still open any compatible project (as per the workspace validation) by using the ‘Set Current’ button in the Projects area of the Administration window.

Leave a Reply