
MRT User’s Manual April 2011 1
MODIS REPROJECTION TOOL
USER’S MANUAL
Release 4.1
April 2011
Land Processes DAAC
USGS Earth Resources Observation and Science (EROS) Center

MRT User’s Manual April 2011 2
Table of Contents
Introduction ................................................................................................................................................... 4
MODIS Reprojection Tool Capabilities ........................................................................................................ 5
Platforms ................................................................................................................................................... 5
Interfaces ................................................................................................................................................... 5
Data Products ............................................................................................................................................ 5
File Formats ............................................................................................................................................... 5
Data Types ................................................................................................................................................. 6
Map Projections ......................................................................................................................................... 6
Resampling ................................................................................................................................................ 6
Format Conversion .................................................................................................................................... 6
Mosaic Tool ............................................................................................................................................... 7
Datum Conversions ................................................................................................................................... 7
Spectral subsetting ..................................................................................................................................... 8
Spatial subsetting ....................................................................................................................................... 8
Output Pixel Size ....................................................................................................................................... 9
Parameter Files .......................................................................................................................................... 9
Metadata .................................................................................................................................................... 9
Background Fill ....................................................................................................................................... 10
Corner Coordinates .................................................................................................................................. 10
Log File ................................................................................................................................................... 10
Bounding Tiles ........................................................................................................................................ 10
Bounding Tile Issue ............................................................................................................................ 11
Bounding Tile Solution ....................................................................................................................... 13
MODIS Reprojection Tool Installation ....................................................................................................... 14
Pre-Installation ........................................................................................................................................ 14
Automatic Installation ............................................................................................................................. 15
Adding a Shortcut Icon in Windows ....................................................................................................... 16
Manual Installation .................................................................................................................................. 17
Manual Installation Instructions for UNIX Platforms ......................................................................... 17
Manual Installation Instructions for Windows Platforms ................................................................... 20
Building the MRT ....................................................................................................................................... 24
Command Line Interface ............................................................................................................................. 28
Parameter Files ........................................................................................................................................ 28
Resample Tool ......................................................................................................................................... 29
Mosaic Tool ............................................................................................................................................. 33
Batch Processing Options ........................................................................................................................ 37

MRT User’s Manual April 2011 3
Windows Batch Processing ................................................................................................................. 37
UNIX Bourne Shell Batch Processing ................................................................................................ 39
Direct Argument Batch Processing ..................................................................................................... 39
Automated Batch Processing .............................................................................................................. 40
MODIS Reprojection Tool GUI .................................................................................................................. 42
Resampling Tool ..................................................................................................................................... 42
Opening an Input File .......................................................................................................................... 43
Metadata Examination......................................................................................................................... 45
Tile Locator ......................................................................................................................................... 46
Spectral Subsetting .............................................................................................................................. 47
Spatial Subsetting ................................................................................................................................ 47
Specify Output File ............................................................................................................................. 48
Output File Type ................................................................................................................................. 49
Resampling Type ................................................................................................................................ 50
Output Projection Type ....................................................................................................................... 50
Output Pixel Size ................................................................................................................................. 52
Load or Save Parameter File ............................................................................................................... 52
Executing resample ............................................................................................................................. 52
Exiting the GUI ................................................................................................................................... 53
Format Conversion .................................................................................................................................. 54
Mosaic Tool ............................................................................................................................................. 54
Credits ......................................................................................................................................................... 56
Contacts ....................................................................................................................................................... 56
Appendix A: MRT Parameter File Format .................................................................................................. 57
File naming conventions ......................................................................................................................... 57
Editing parameter files ............................................................................................................................ 57
Parameter file format ............................................................................................................................... 57
Appendix B: MRT Raw Binary File Format ............................................................................................... 61
File naming conventions ......................................................................................................................... 61
Header file format ................................................................................................................................... 62
Editing header files .................................................................................................................................. 63
Notes ........................................................................................................................................................ 63
Appendix C: Projection Parameters ............................................................................................................ 65
Projection Parameters 1-8 ....................................................................................................................... 65
Projection Parameters 9-15 ..................................................................................................................... 66
Notes ........................................................................................................................................................ 68

MRT User’s Manual April 2011 4
Introduction
The Moderate Resolution Imaging Spectroradiometer (MODIS) was launched into space aboard the
National Aeronautics and Spaces Administration (NASA) Earth Observing System (EOS) platform Terra
in December 1999. A second MODIS sensor was launched on the Aqua platform in May 2002. The
objective of MODIS is to provide a comprehensive series of global observations of Earth’s land, oceans,
and atmosphere at higher spatial resolutions (250-meter (m), 500-m, 1,000-m) than its predecessor, the
Advanced Very High Resolution Radiometer (AVHRR), and more frequently (near-daily overpass) than
its orbital neighbor Landsat 7
1
. MODIS observations are critical for studies of climate, vegetation,
pollution, global change, and many other important economic and environmental issues.
The MODIS Reprojection Tool (MRT) was developed to support higher level MODIS Land products
which are distributed as Hierarchical Data Format-Earth Observing System (HDF-EOS)
2
files projected to
a tile-based Sinusoidal grid. MRT software facilitates the use of MODIS Land tiles by providing map
projection, format conversion, and spectral and spatial subsetting options and is compiled for use on
multiple operating systems.
MRT functionality is based on the resample
and mrtmosaic executables that may be run either from
the command line or from a Graphical User Interface (GUI). The GUI is an easy, user-friendly way to
input data for manipulation, and the more powerful command line interface serves users with intensive
data processing requirements. This User’s Manual describes the use of both to run the MRT resample
and mrtmosaic programs.
1
More information about MODIS is available from http://modis.gsfc.nasa.gov/.
2
More information about HDF and HDF-EOS is available from http://www.hdfgroup.org/ and http://hdfeos.net/
respectively.

MRT User’s Manual April 2011 5
MODIS Reprojection Tool Capabilities
Platforms
MRT is highly portable software available for four platforms, and has been tested on the following
systems.
• Windows NT+ 32-bit
• Linux 32-bit
• Linux 64-bit
• Macintosh OS X 32-bit
Though they were not tested, MRT is expected to install and run on other systems (such as
Windows Vista and Windows 7).
Consult the Release Notes for platform-specific differences and
caveats.
Interfaces
MRT may be invoked either from a user-friendly GUI or from a powerful command-line interface. The
GUI allows novices and users with light processing requirements to reproject, convert, and subset
MODIS tiled data. The GUI also allows easy inspection of metadata. The scriptable command-line
interface, with its variety of command-line options, is likely to be the method of choice for reprojecting
large numbers of files.
Data Products
MRT currently allows reprojection of all gridded (levels-2G, 3, and 4) MODIS Land data products.
Support for swath (levels-1B and 2) data is available in the MRTSwath application
3
.
Most MODIS products are 2-Dimensional (2-D), but there are some 3-D and 4-D data sets (e.g., the
MCD43 BRDF-Albedo suite
4
). The MRT supports 3-D and 4-D data products and currently outputs them
to 2-D data products for raw binary, georeferenced tagged image file format (GeoTIFF), and HDF-EOS
output formats.
File Formats
MRT accepts raw binary or tiled MODIS Land products in HDF-EOS format as input. Output file formats
include raw binary, HDF-EOS, and GeoTIFF. The raw binary file format is specified in Appendix B.
3
MRTSwath is a no-cost download from https://lpdaac.usgs.gov/lpdaac/tools/modis_reprojection_tool_swath.
4
Summary information on an example of multi-dimensional MODIS data is available at
https://lpdaac.usgs.gov/lpdaac/products/modis_products_table/brdf_albedo_model_parameters/16_day_l3_global_5
00m/mcd43a1.
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