SUM File Documentation

Overview

Feature Value
File Extension .sum
Format Type Binary
Primary Use Checksum Verification
Associated Programs Garmin Software
MIME Type application/octet-stream
Developed by Garmin
File Signature Binary specific, not text-readable
Checksum Type Proprietary Garmin Algorithm
Function Ensure integrity of Garmin map files
Security Used to verify file tampering
Portability Portable across Garmin devices
How to Open Automatically processed by Garmin software/devices
Editable No, altering may corrupt file integrity
Creation Generated by Garmin tools/software
Update Frequency Every time the original file changes
Complexity Low for end users, high technical complexity in background
Compatibility Specific to Garmin eco-system
Size Typically very small, just a checksum value
Recovery If lost, can be regenerated by Garmin software
Encoding Binary encoding