How to pansharpen Landsat 8 in GRASS GIS 7?

BTW: having a range of 0-65535 for original LANDSAT data is odd since they are delivered as 8 bit channels (0-255). So check your input data first. For a simplified procedure with current GRASS GIS 7, see the page Processing Landsat 8 data in GRASS GIS 7: RGB composites and pan sharpening

Which is pan sharpening algorithm does i.pansharpen use?

Pan sharpening allows bands 3-2-1 (or other combinations of 30m resolution bands like 4-3-2 or 5-4-2) to be combined into a 15m resolution color image. i.pansharpen offers a choice of three different ‘pan sharpening’ algorithms: IHS, Brovey, and PCA.

Which is the latest version of GRASS GIS?

Note: A new GRASS GIS stable version has been released: GRASS GIS 7.8, available here. i.pansharpen uses a high resolution panchromatic band from a multispectral image to sharpen 3 lower resolution bands.

Is it possible to pansharpen Landsat 7 RGB band combination?

Is it possible to pansharpen Landsat 7 RGB band combination (without NIR) to have approximately the same intensities as the original RGB image with gdal_pansharpen.py (weighted Brovey algorithm)? What

How big is the panchromatic band on Landsat 7?

The spectral bands of Landsat 7 and 8 have a resolution of 30 meters per pixel, while the panchromatic band has a resolution of 15 meters per pixel. By itself, the panchromatic band would look somewhat uninteresting; like other individual bands, it appears black and white.

How is panchromatic sharpening used in Landsat imagery?

Panchromatic sharpening (pan-sharpening) is a technique that combines the high-resolution detail from a panchromatic band with the lower-resolution color information of other bands (usually only the visible bands). The spectral bands of Landsat 7 and 8 have a resolution of 30 meters per pixel,…

What are the spectral bands for Landsat 7?

With respect to Landsat 7 two new spectral bands have been added: a deep-blue band for coastal water and aerosol studies (band 1), and a band for cirrus cloud detection (band 9). Furthermore, a Quality Assurance band (BQA) is also included to indicate the presence of terrain shadowing, data artifacts, and clouds.

What is the BQA of a Landsat 8 scene?

One of the bands of a Landsat 8 scene is named “BQA” which contains for each pixel a decimal value representing a bit-packed combination of surface, atmosphere, and sensor conditions found during the overpass. It can be used to judge the overall usefulness of a given pixel.

What was the purpose of the Landsat 8 mission?

The Landsat 8 mission is a collaboration between the U.S. Geological Survey (USGS) and National Aeronautics and Space Administration (NASA) which continues the acquisition of high-quality data for observing land use and land cover change. The Landsat 8 spacecraft which was launched in 2013 carries they following key instruments:

How to convert Landsat OLI data to Toa reflectance?

Manually Converting Landsat 8 OLI data to ToA Reflectance: These data can be converted to ToA Reflectance using rescaling factors and parameters found in the metadata file (MTL.txt) provided with the data. The formulas and detailed explanations can be found on the USGS site: Using the USGS Landsat 8 Product .

What is the resolution of Landsat 7 and 8?

The spectral bands of Landsat 7 and 8 have a resolution of 30 meters per pixel, while the panchromatic band has a resolution of 15 meters per pixel.

How to pansharpen Landsat 8 in GRASS GIS 7?