Free Post-Processing Services

C4Gnet.XYZ GNSS Online Post Processing - powered by Trimble Online Processing App

Works throughout Louisiana and some parts of Mississippi and Texas.

Get a Free C4Gnet.XYZ GNSS Online Post Processing Service Account, user accounts are available for the C4Gnet.XYZ GNSS Online Post Processing Service which requires a yearly free subscription that is available simply by asking one of the C4Gnet.XYZ administrators. To get a free user account, first Register Here then send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it. and request a free C4Gnet.XYZ GNSS Online Post Processing Service Subscription.

Here is a list of other free online GPS post-processing services:

  • OPUS: (Currently Under Government Shutdown) NGS GPS Data Processing Online Positioning User Service
  • CSRS-PPP: Canadian Spatial Reference System, Natural Resources Canada
  • AUSPOS: Geoscience Australia
  • GAPS: University of New Brunswick
  • APPS: Jet Propulsion Laboratory
  • SCOUT: Scripps Orbit and Permanent Array Center (SOPAC). University of California, San Diego
  • magicGNSS: GMV
  • CenterPoint RTX: Trimble Navigation