GPKG
application/x-geopackage
Magic Bytes
Offset: 0
53 51 4C 69 74 65 20 66 6F 72 6D 61 74 20 33 00
GeoPackage is an open, standards-based file format governed by the Open Geospatial Consortium (OGC) intended for the exchange of geospatial information. Built upon the SQLite database architecture, it is utilized extensively by Geographic Information Systems (GIS) to store vector features, map tiles, and non-spatial attributes within a single container. This format serves as a modern, platform-independent alternative to legacy Shapefiles, offering broad compatibility across mobile and desktop mapping environments.
Validation Code
How to validate .gpkg files in Python
Python
def is_gpkg(file_path: str) -> bool:
"""Check if file is a valid GPKG by magic bytes."""
signature = bytes([0x53, 0x51, 0x4C, 0x69, 0x74, 0x65, 0x20, 0x66, 0x6F, 0x72, 0x6D, 0x61, 0x74, 0x20, 0x33, 0x00])
with open(file_path, "rb") as f:
return f.read(16) == signatureHow to validate .gpkg files in Node.js
Node.js
function isGPKG(buffer: Buffer): boolean {
const signature = Buffer.from([0x53, 0x51, 0x4C, 0x69, 0x74, 0x65, 0x20, 0x66, 0x6F, 0x72, 0x6D, 0x61, 0x74, 0x20, 0x33, 0x00]);
return buffer.subarray(0, 16).equals(signature);
}
Go
func IsGPKG(data []byte) bool {
signature := []byte{0x53, 0x51, 0x4C, 0x69, 0x74, 0x65, 0x20, 0x66, 0x6F, 0x72, 0x6D, 0x61, 0x74, 0x20, 0x33, 0x00}
if len(data) < 16 {
return false
}
return bytes.Equal(data[:16], signature)
}API Endpoint
GET
/api/v1/gpkg
curl https://filesignature.org/api/v1/gpkg