HDF
application/x-hdf
Magic Bytes
Offset: 0
0E 03 13 01
Hierarchical Data Format (HDF) is a data model, library, and file format originally developed by the National Center for Supercomputing Applications (NCSA) and now maintained by The HDF Group. It is extensively used in scientific computing to manage complex, multi-object datasets, particularly in fields like earth science, climatology, and aerospace engineering. While this specific signature typically denotes the older HDF4 standard, the format remains critical for accessing legacy scientific archives and meteorological data repositories.
Validation Code
How to validate .hdf files in Python
Python
def is_hdf(file_path: str) -> bool:
"""Check if file is a valid HDF by magic bytes."""
signature = bytes([0x0E, 0x03, 0x13, 0x01])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .hdf files in Node.js
Node.js
function isHDF(buffer: Buffer): boolean {
const signature = Buffer.from([0x0E, 0x03, 0x13, 0x01]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsHDF(data []byte) bool {
signature := []byte{0x0E, 0x03, 0x13, 0x01}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/hdf
curl https://filesignature.org/api/v1/hdf