X

Help Articles are product support tips and information straight from the NV5 Geospatial Technical Support team developed to help you use our products to their fullest potential.



5884 Rate this article:
1.0

Spectral Library Exchange Format (SLEF)

Question: 

What is the Spectral Library Exchange Format (SLEF) that some of ENVI's THOR tools can work with?

Answer:

The SLEF is a "format" that was developed by a number of intelligence agencies that were dealing with spectral signature data and wanted a common way to store not just signature data, but also metadata (classification, who collected it, details about material, where it was collected, when it was collected, etc.). 

The the SLEF consists of a simple comma separated value (CSV) text file.  The top section is:

   Metadata field name, metadata value

The bottom section is:

   Wavelength value, data value(, additional data values if more than one signature, all separated by commas)

THOR has the capability to ingest multiple SLEF files and combine them into a Metadata Rich Spectral Library (MRSL), or resample them all to common wavelengths (and strip all metadata) to form an ENVI spectral library file.

 

reviewed 8/28/14 PS & KK

Please login or register to post comments.
Featured

End-of-Life Policy Enforcement for ENVI 5.3 / IDL 8.5 and Earlier Versions

5/6/2024

April 1, 2024 Dear ENVI/IDL Customer,  We are reaching out to notify you of our supported... more »

How to Upgrade licenses to ENVI 6.x / IDL 9.x

12/5/2023

What is the new Upgrade function? Starting with ENVI 6.0 and IDL 9.0, we have implemented an... more »

What to do if the 'License Administrator - License Server' for the Next-Generation License Server does not start?

6/13/2023

Background: With the release of ENVI 5.7 & IDL 8.9 and the corresponding Next-Generation licensing... more »

Next-Generation Licensing FAQ

4/28/2023

  NV5 Geospatial has adopted a new licensing technology for all future releases of our ENVI, IDL... more »

The IDL Virtual Machine

6/6/2013

What is the IDL Virtual Machine? An IDL Virtual Machine is a runtime version of IDL that can... more »