Crop Agriculture

Updated Landsat 8 Reflectance Tutorial w/ Imagery

GIS AG MAPS Image-Based DOS Surface Reflectance Methods & TOA

Related Pages: L8 Lowest Valid Value Method    Revised L8 Relative Scatter Lookup Table    L8 SR Results   

Landsat 8 DOS Surface Reflectance Worksheet & Calculator - New

Landsat surface reflectance is available for free from the USGS, though it can be beneficial to also be able to convert to surface reflectance independently; for example, surface reflectance may not available for a particular scene or it may be needed as soon as possible. GIS Ag Maps offers simple and fast dark-object subtraction (DOS; Chavez [1988]) methods - you do need software that will enable you to view a raster attribute table. Results published in Remote Sensing of Environment based on using GIS Ag Maps DOS SR for NDVI can be viewed here.

Data Download for Surface Reflectance (SR) Tutorial Includes: 1) Landsat 8 DN imagery for tutorial, 2) corresponding USGS algorithm surface reflectance imagery for comparison (in native integer raster format; divide by 10,000 for surface reflectance units), and 3) a composite RGB surface reflectance image (based on tutorial values). See below for more information.