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Command Line Tools

Day of Year Converter

  • Calendar Date to Day-of-Year converter for Linux

DateConverter: Converts dates between calendar day and day-of-year. Automatically adjusts for leap years. Developed by Gala Wind (NASA GSFC).  MORE

Spatial and Dataset Subsetting (for HDF files)

  • Subsetting Single Resolution HDF Files

SnglResSubsetter: This program provides both spatial and data set subsetting for HDF files where the Lat/Lon data and all scientific data sets (SDS's) have the same spatial resolution (MOD03, MOD04_L2, and MOD07_L2). Developed by Eric Moody (NASA GSFC). Fortran 90, PERL Script (HDF-EOS Toolkit Required).  MORE

  • Subsetting Double Resolution HDF Files

TwoResSubsetter: This program provides both spatial and data set subsetting for HDF files where the Lat/Lon data is at one resolution and additional scientific data sets (SDS's) are either at the same or a finer (smaller) spatial resolution (MOD02_1KM, MOD05_L2, MOD06_L2, and MOD35_L2). Developed by Eric Moody (NASA GSFC). Fortran 90, PERL Script (HDF-EOS Toolkit Required).  MORE

Visualization & Analysis

  • Unmapped Visualizing of Level 1 and Level 2 (Granule) HDF Data

Unmapped Visualizer: This IDL tool can unpack a MODIS product HDF file and create an unmapped image of a particular scientific data set (SDS). Developed by Eric Moody (NASA GSFC). IDL, PERL.  MORE

  • Mapped Visualizing of Level 1 and 2 (Granule) HDF Data

Mapped Visualizer: This IDL tool can unpack a MODIS product HDF file and create a mapped image of particular scientific data set (SDS). Developed by Eric Moody (NASA GSFC). IDL, PERL. MORE

  • Unmapped Visualizing of Level 2 (Granule) HDF Bitflag Data

Bitflag Visualizer: This IDL program extracts bit flags from byte data arrays, and then plots them (unmapped) using a 23-color discrete color bar. The code is designed to extract any Runtime QA bit flag and/or 35_L2 Cloud Mask bit flags. Developed by Paul A Hubanks (NASA GSFC). IDL. MORE

  • Mapped Visualizing of Level 2 (Granule) HDF Bitflag Data

Bit Mapper: This IDL program extracts bit flags from byte data arrays, and then plots them on a geolocated map with a user-defined color scheme. The specific codes are designed to extract MOD06 L2 QA bit flags and Cloud Mask (MOD06 or MOD35) bit flags, but can be modified to extract and visualize other bit flags. Developed by Eric Moody (NASA GSFC). IDL. MORE

  • Visualizing Level 3 (Global) HDF Data

Make_PNG: This IDL tool can create a complete set of PNG browse images from a MODIS-Atmosphere Level-3 HDF product file. Developed by Paul A Hubanks, Bill Ridgway (NASA GSFC). IDL. MORE