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Open-File Report 2008–1183

View_SPECPR: Software for Plotting Spectra (Installation Manual and User’s Guide, Version 1.2)

By Raymond F. Kokaly

USGS Afghanistan Project Product No. 189


Thumbnail of and link to report PDF (4.2 MB)This document describes procedures for installing and using the “View_SPECPR” software system to plot spectra stored in SPECPR (SPECtrum Processing Routines) files. The View_SPECPR software is comprised of programs written in IDL (Interactive Data Language) that run within the ENVI (ENvironment for Visualizing Images) image processing system. SPECPR files are used by earth-remote-sensing scientists and planetary scientists for storing spectra collected by laboratory, field, and remote sensing instruments. A widely distributed SPECPR file is the U.S. Geological Survey (USGS) spectral library that contains thousands of spectra of minerals, vegetation, and man-made materials (Clark and others, 2007). SPECPR files contain reflectance data and associated wavelength and spectral resolution data, as well as meta-data on the time and date of collection and spectrometer settings. Furthermore, the SPECPR file automatically tracks changes to data records through its “history” fields. For more details on the format and content of SPECPR files, see Clark (1993). For more details on ENVI, see ITT (2008). This program has been updated using an ENVI 4.5/IDL7.0 full license operating on a Windows XP operating system and requires the installation of the iTools components of IDL7.0; however, this program should work with full licenses on UNIX/LINUX systems. This software has not been tested with ENVI licenses on Windows Vista or Apple Operating Systems.

Version 1.0

Posted August 2008

Suggested citation:

Kokaly, R.F., 2008, View_SPECPR: Software for Plotting Spectra (Installation Manual and User’s Guide, Version 1.2): U.S. Geological Survey Open-File Report 2008-1183, 26 p.


Introduction.1 Installation of Software

Running the program to view SPECPR files and plot spectra

Function 1 – Listing the contents of a SPECPR file

Function 2 – Navigating through the record list

Function 3 – Saving the list of records in the SPECPR file

Function 4 – Plotting the data in a selected record

Function 5 – Viewing the header, text, or DESCRIPT information in a record

Function 6 – Viewing the “Help file”

Function 7 – Exporting a selected record to ASCII text

Function 8 – Performing continuum removal on a record

Function 9 – Quitting the program

iPlot Functions

iPlot Function 1 - Export to encapsulated postscript

iPlot Function 2 - Export plotted data to ASCII text

Release Notes

References Cited

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