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Data Set ID:
NSIDC-0327

SMEX03 Landsat Thematic Mapper Imagery: Georgia, Version 1

This data set provides imagery developed from Landsat 5 Thematic Mapper (TM) data for use in studying land cover features during the Soil Moisture Experiment 2003 (SMEX03).

Geographic Coverage

Parameter(s):
  • Infrared Wavelengths > Infrared Imagery
  • Visible Wavelengths > Visible Imagery
Spatial Coverage:
  • N: 31.96, S: 30.9, E: -83.36, W: -83.97

Spatial Resolution: Not Specified
Temporal Coverage:
  • 20 July 2003
Temporal Resolution: Not specified
Data Format(s):
  • GeoTIFF
Platform(s) LANDSAT-5
Sensor(s): TM
Version: V1
Data Contributor(s): Michael Cosh
Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Cosh, M. 2007. SMEX03 Landsat Thematic Mapper Imagery: Georgia, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: http://dx.doi.org/10.5067/NWSOGVLENI2J. [Date Accessed].

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Detailed Data Description

This data set provides imagery developed from Landsat 5 Thematic Mapper (TM) data for use in studying land cover features during the Soil Moisture Experiment 2003 (SMEX03).

For this study, TM bands 2, 3, and 4 were combined to make false color composites.

  • Vegetation appear as shades of red. Brighter reds indicate thicker vegetation.
  • Soils with little or no vegetation appear as shades from white (sands) to green or brown, depending on moisture and vegetation content.
  • Water appears blue.
  • Urban areas appear as blue-gray.
  • Clouds and snow appear bright white.
Format

Data are provided as a GeoTIFF image file with associated TIFF world file (TFW) containing georeferencing information. GeoTIFF defines a set of publicly available TIFF tags that describe cartographic and geodetic information associated with TIFF images. GeoTIFF enables referencing a raster image to a known geodetic model or map projection. The initial tags are followed by image data, that in turn may be interrupted by more descriptive tags. By using the GeoTIFF format, both metadata and image data can be encoded into the same file.

The TFW file provides georeference information for the image with the same file name and is a text file with six numbers. Refer to Table 1 for a description of the TFW file contents.

Table 1: TFW File Rows
Row Description
1
the dimension of a pixel in map units in the x direction
2
rotation term for row
3
rotation term for column
4
the dimension of a pixel in map units in the y direction
5
x coordinate for upper left corner
6
y coordinate for upper left corner
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File Naming Convention

Files are named according to the following convention:

Example File Names: TM5_GA_072003.tif and TM5_GA_072003.tfw

TM5_GA_MMDDYY.tif and TM5_GA_MMDDYY.tfw

Where

MM = month
DD = day
YY = year

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File Size

File sizes are approximately 18.1 MB for the .tif file and 1 KB for the .tfw file.

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Volume

Total volume is approximately 18.2 MB.

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Spatial Coverage

Southernmost Latitude: 30.90° N
Northernmost Latitude: 31.96° N
Westernmost Longitude: 83.97° W
Easternmost Longitude: 83.36° W

Spatial Resolution

The Landsat TM data are high-resolution 30 m data.

Projection

Universal Transverse Mercator (UTM) Zone 15.

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Temporal Coverage

20 July 2003

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Parameter or Variable

Infrared Imagery (Band 4)
Visible Imagery (Bands 2 and 3)

Parameter Description

Bands 2, 3, and 4 as blue, green, and red are used to generate a false color image that can be used to identify land cover and vegetation.

Parameter Source

TM scenes from Landsat 5 were acquired during the study period. The following table details the Landsat coverage for the dates of the study.

Table 2: Landsat Coverage Details
Date Landsat
Number
Path / Row
July 20
5
18 / 36

Sample Data Record

False Color Image of the Tifton Area
Figure 1: False Color Image of the Tifton Area, Sample from Image File TM5_GA_072003.tif.

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Software and Tools

Software and Tools

A program which recognizes the GeoTIFF file format is recommended for this image.

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Data Acquisition and Processing

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References and Related Publications

Contacts and Acknowledgments

Michael H. Cosh
USDA ARS Hydrology and Remote Sensing Lab
Beltsville, MD 20705
USA

Acknowledgments: 

The investigators would like to acknowledge the following people: The many graduate students and volunteers who worked to collect the field data. The Soil Moisture Experiment 2003 Science Team and the Southeast Watershed Research Laboratory (USDA-ARS) for their assistance. The National Aeronautics and Space Administration for their generous contributions to the study. This work was supported by the NASA Aqua AMSR, Terrestrial Hydrology and Global Water Cycle Programs.

Document Information

DOCUMENT CREATION DATE

15 November 2007

DOCUMENT REVISION DATE

1 May 2008 - Updated new USGS Landsat web page

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