GPS Seed File Creation



The ITSFM GPS Seed File training teaches students best practices for creating new seed files that included the latest version of the data dictionary, local road names and the mile marker locations at 1/10th mile intervals to support efficient GPS data collection in the field.

Class Duration

  • Two days.


  • Previous civil, outside plant telecommunication, surveying or GPS mapping experience.
  • Intermediate-level computer experience.
  • Must have a backlog of at least one roadway corridor available for the creation of new GPS seed files.



Hardware/Software/Material Requirements

  • GPS mapping vehicle equipped with calibrated electronic distance measuring equipment and safety lights.
  • Trimble Geo7x data collector capable of sub-meter accuracy and equipped with TerraSync 5.85 or newer and external mount antenna.
  • Laptop computer equipped with Microsoft Mobile Device Center.
  • Licensed Trimble Pathfinder Office.



Module 1 – Introduction and task overview

Module 2 – Planning Seed Files:

  • Use FDOT’s straight-line diagrams (SLD) to determine route layout
  • Start/stop points
  • Required mile marker frequency
  • Create route maps defining the work
  • Get District approval for the route layout
  • Request data dictionary updates from Central Office

Module 3 – Schedule and Coordination:

  • Prepare time estimate.
  • Schedule Equipment:
  • GPS Data Collector and Software.
  • GPS mapping vehicle.
  • Shadow vehicle for maintenance of traffic and two-way radios if required.

Module 4 – DMI Accuracy and Setup

  • DMI Setup

whitesignsModule 5 – GPS Data collector Accuracy and Setup

Lesson 1 – Introduction to GPS Mapping

Lesson 2 - GPS Data Collector File Naming

Lesson 3 – Geo7x/TerraSync Setup and Operation

Lesson 4 – GPS Feature Mapping

Lesson 5 – Geo7x Data Transfer and Differential Correction

Lesson 6 – Export and Review

Lesson 7 – GPS Mapping Quality Review

Module 6 – Seed File Disposition

  • Create KML of mile marker locations
  • Submit new seed file and KML file to Central Office for distribution and depository.

This instructor-led training includes the following hands-on exercises are performed throughout the training.

#1 – Create route maps for three roadways

#2 - Setup and calibration

#3 - Preview the data dictionary

#4 – Create mapping file

#5 – Geo7x setup and operation

#4 – GPS feature mapping in the field

#6 – Data transfer and perform differential correction

#7 – Export review

#8 – Mapping quality review

#9 – Create KML file