Img-ndvi1998 grid

Original image: Landsat Thematic Mapper (TM), August, 1998

Image preprocessing unknown.

Normalized difference vegetation index (NDVI) calculated on TM bands 3 and 4.

Band 3 is visible red; band 4 is near-infrared.

NDVI = (band 4 - band 3) / (band 4 + band 3)

NDVI is an indicator of plant biomass; vegetation tends to increase with NDVI values. Values were rescaled as integer values between 0 and 255 to better match 'standard' DN values found in grey scale images to facilitate conversion of the data to a TIFF.

State Plane Coordinate System 1983 (WA North)

created by Eugene Martin CommEn Space 1998