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Spectral Libraries

A spectral signature records a measured spectrum. A spectral library groups signatures so they can be found, reviewed, shared, and used as dataset reference spectra.

Open Manage > Spectral libraries. Spectral Explorer also provides a Spectral libraries entry in its tools menu.

Find signatures​

Search by name, choose Group, or apply Filter. The browser can group by Library, Wavelength Family, Chapter, Material Category, Sensor Family, Product, Processing, or Location.

The browser scopes distinguish:

  • My libraries: libraries you own
  • Current project: libraries assigned to the active project; when no project is active, this scope becomes All projects
  • Published: tenant-wide published libraries
  • System: built-in, read-only libraries

Filters also cover signature metadata such as chapter, material category, wavelength family, sensor family, product, processing stage, location, and theme. Enable Include archived only when you need inactive libraries.

Create and upload​

  1. Select New library. A new library starts as Private and has no project assignment.
  2. Name the library and edit its metadata in the details panel.
  3. Open the library's context menu and select Upload signatures.
  4. Add an ENVI spectral-library pair: the .hdr header and .sli data file with the same base name.
  5. Select Upload after the pair validates.

System libraries cannot be edited, uploaded to, archived, or deleted.

Set who can use a library​

Use Status in a library's context menu:

  • Private removes its project assignment and keeps it in your personal working scope.
  • Project assigns it to one selected project.
  • Published makes a curated library available in the Published scope.
  • System identifies a built-in read-only library; users cannot assign this status.

Use Archive to hide inactive work from the default browser without deleting it. Enable Include archived and select Restore to return it to active results.

Curate metadata​

Select signatures and choose Edit metadata, or select a library and choose Bulk edit signatures. Descriptive fields such as material category, wavelength family, sensor family, product, processing, location, acquisition dates, and themes make signatures discoverable without encoding everything in the library name.

Consolidate libraries​

Select two or more editable libraries and choose Merge into, then select the target. Clarity moves source-library signature links into the target, deduplicates links to the same signature, resolves duplicate names, and deletes the source libraries. Review the selection carefully; merge is not a copy operation.

Use Delete only when a library or signature should be permanently removed. Archive a library instead when it may still be needed for reference.

Alpha

Export as ENVI is shown only when Alpha features are enabled.