Navilink (.sbp)
A .sbp file is a GPS tracklog recorded by a Locosys GT-31 or BGT-31 handheld data logger and downloaded to a PC over the device's "Navilink" USB/Bluetooth connection.
At a glance
| Extension | .sbp |
| Encoding | binary |
| Invented | 2008 |
| By | Locosys Technology Inc. |
History
Locosys Technology Inc. (Taiwan) released the GT-31 and BGT-31 GPS data loggers in 2008. "Navilink" is Locosys's name for the device's PC connectivity mode and companion desktop utility, used to pull logged tracks off the device; the .sbp file it produces is documented by GPSBabel as the "SBP" datalog format, separate from GPSBabel's own "navilink" entry, which instead covers the same devices' serial protocol rather than the .sbp file itself.
Where it is used
The GT-31/BGT-31 log GPS positions to an SD card or, on the BGT-31, an internal memory buffer; a .sbp file is what results from transferring that log to a computer via the Navilink connection, for later use in mapping or track-analysis software.
Structure
A binary file with a 64-byte header (device user name, serial number, log rate and firmware version) followed by fixed 32-byte records, one per logged position — each record packs a timestamp, satellite count, HDOP, latitude, longitude, altitude, speed and heading.
How widespread
The GT-31/BGT-31 are a specific, long-superseded Locosys product generation; files in this format come from an existing device or an old SD-card archive rather than from any currently-sold Locosys hardware.
RouteConverter support
| Reads | Navilink |
RouteConverter reads this format but cannot write it.
RouteConverter reads .sbp files with its own parser (not via GPSBabel) but cannot write them.