Landsat 4-7 Surface Reflectance (LEDAPS)

Long name Landsat data set
Short name LMTX/LDC7
Sensor type Optical
Platform Landsat-4, Landsat-5, Landsat-7 ETM+
Key file name (use to open data set) *_MTL.txt
Supported file extensions .txt, .tif
Sections

Data product name and description
Distribution disk files
Returned data for supported format
References

Data product name and description

Note: The information provided herein is based on the data distributor's documentation cited under References.
Sensor

Spectral bands:
Spectral range (nm)

Spatial resolution (m)*
(spectral resolution)

Notes
MS

450 - 520 (Blue)
520 - 600 (Green)
630 - 690 (Red)
760 - 900 (NIR)
1550 - 1750 (SWIR)
2080 - 2350 (SWIR)

30 185 km swath width

* Resolution is always nadir position unless noted otherwise.

Distribution disk files

A Landsat 4-7 Surface Reflectance data set is organized in a specific folder structure on disk. GDB uses this folder structure and the file names to identify the data product type.

Warning: Data sets for this sensor are organized in a specific folder structure on disk. GDB uses this structure and the file names to identify the data product type. Do not alter the folder structure or any file names prior to data ingestion to ensure the image data and auxiliary information are imported correctly.

In CATALYST Professional programs, such as Focus, you can open a Landsat 4-7 Surface Reflectance data set in the File Selector window by selecting the *_MTL.txt file.

When opening a Landsat 4-7 Surface Reflectance data set, the files read by GDB are as described in the following table.

File name Format Required Contents/details
*_MTL.txt Text Yes Key file name. Use this file to open the data set.
*.TIF GeoTIFF Yes TIFF image file. Contains imagery information.
*.ANG.txt ASCII No Angle-coefficent file that provides model coefficients of the sensor-viewing angle. With this file, you can create angle bands and compute solar and sensor-viewing angles per pixel.

Returned data for supported format

Landsat 4-7 Surface Reflectance data can be opened directly in its raw vendor format or imported into a PCIDSK (*.pix) file using the key file name. For optimal processing, use the PCIDSK format. The data structure, after it is opened by GDB, is as described in the following table.

Data product Data returned Details
Landsat 4-7 30m Surface Reflectance

7 x [16S] raster channels

3 x [16U] raster channels
2 x [TEX] text segments

6 x Surface Reflectance bands (Blue, Green, Red, NIR, IR, SWIR).

1 x Atmospheric Opacity band.

1 x Pixel Quality band.

1 x Radiometric Saturation Quality band.

1 x Cloud Quality band.

Metadata (*_MTL.txt) file
Angle Coefficient (*_ANG.txt) file

Landsat 4-7 30m Azimuth/Zenith

4 x [16S] raster channels

2 x [TEX] text segments

Solar Azimuth, Solar Zenith, Sensor Azimuth, Sensor Zenith bands.

Metadata (*_MTL.txt) file
Angle Coefficient (*_ANG.txt) file

Landsat 4-7 30m Quality

20 x [BIT] bitmap segments
2 x [TEX] text segments

Metadata (*_MTL.txt) file
Angle Coefficient (*_ANG.txt) file

References

For more information, visit: landsat.usgs.gov

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