MATLAB utilities for the BYU-MERS "SIR" image format

The BYU-MERS "sir" image format was developed by the Brigham Young
University (BYU) Microwave Earth Remote Sensing (MERS) research group
to store images of the earth along with the information required to
earth-locate the image pixels.

Files in this directory are useful for reading SIR files into matlab
and locating pixels.  Use loadsir.m to load the file into memory.

Main routines:  (version 2.0 SIR format)

 loadsir.m            loads image and header information into matlab
 printsirhead.m       prints out the header information from loadsir
 pix2latlon.m         given a pixel location, compute lat and lon
 latlon2pix.m         compute pixel location given lat and lon
 writesir.m           writes sir format file
 showsir.m            display image read using loadsir
 viewsir.m            interactive display of SIR file

Support routines:

 easegrid.m           forward EASE grid transformation
 ieasegrid.m          inverse EASE grid transformation
 ease2grid.m          forward EASE2 grid transformation
 ieasegrid.m          inverse EASE2 grid transformation
 ilambert1.m          inverse Lambert grid transformation
 ipolster.m           inverse polar stereographic grid transformation
 lambert1.m           forward Lambert grid transformation
 polster.m            forward polar stereographic grid transformation
 f2ipix.m             quantize floating point values to integer pixel address
 sirlex.m             convert i,j pixel address to linear index
 isirlex.m            convert linear index to i,j pixel address

Other files:

 Contents.m           Matlab help file
 readme.txt           this file
 green.sir            small sample sir file
 scaleimage.m         utility to scale image for display
 showsir.m            simplified display routine for sir image
 display_head.m       display name/values of SIR file header variables
 ease2_check.m        check EASE2 projection code
 example_ease2grid.m  illustrate EASE2 projection transformations
 loadpartsir.m        load only part of a SIR file
 projtest.m           compare SIR projection computation to proj and gdal
 scaleimage.m         scale image to 0..64
 setsirhead.m         set SIR header values by name
 sirheadvalue.m       get SIR header values by name
 sirheadtext.m        set text fields of sir header
 ease2_map_info.m     EASE2 grid information (internal)

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Dr. David G. Long                                              long@ee.byu.edu
Professor                                                voice: (801) 422-4383
Electrical and Computer Engineering Department             fax: (801) 422-0201
459 Clyde Building
Brigham Young University
Provo, Utah    84602

Scatterometer Climate Record Pathfinder (SCP)  http://www.scp.byu.edu

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Last revised:  6 Aug 2017 DGL
(c) 1997, 2017 BYU MERS