GeoSage enhances software to analyze Landsat-8 imagery

January 6, 2016  - By


GeoSage’s software tool, Spectral Transformer for Landsat-8 Imagery, has been enhanced to include new functions towards automated image feature extraction.

The changes are built upon the existing tool, so with two button clicks, a user is able to rapidly perform image-band combinations, image stretching and image pan-sharpening, and produce colorful, detail-rich imagery composites at 30m and 15m resolutions.

New functions include:

  • one-button click for automated NDVI calculation, with 3 types of outputs.
  • one-button click for automated extraction of surface water areas, with 3 types of outputs.
  • generic function to calculate 56 normalized difference image feature indices, with 3 types of outputs.
  • generic function to calculate 56 band ratios, with 3 types of outputs.

The 3 types of outputs are automatically generated by the software. Each is a single-band GeoTIFF file, ready to be displayed in Windows Photo Viewer, GIS and remote sensing software, or Google Earth Pro.

  • First output: 32-bit Float data type, useful for further analyses.
  • Second output: 8-bit Byte data type, a unique colour palette is applied.
  • Third output: 8-bit Byte data type, a binary image to show classified features after a user-defined threshold is applied.

This Landsat-8 image analysis software tool targets geospatial professionals, K-12 students, as well as the general public. It is very easy to use, productive and saves time. To test the new functions, a trial version is available. Updated software user guide and new application demos are also provided.

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About the Author: Tracy Cozzens

Senior Editor Tracy Cozzens joined GPS World magazine in 2006. She also is editor of GPS World’s newsletters and the sister website Geospatial Solutions. She has worked in government, for non-profits, and in corporate communications, editing a variety of publications for audiences ranging from federal government contractors to teachers.