Global River Widths from Landsat Map (IMAGE) University of North Carolina at Chapel Hill Caption The Global River Widths from Landsat (GRWL) Database contains over 58M measurements of planform river geometry. Line plot at right shows observed river coverage as a percentage of land area by latitude, and insets show GRWL at increasing spatial scale. Rightmost inset shows GRWL orthogonals over which river width is calculated with only every 8th orthogonal shown for clarity. Credit UNC-Chapel Hill Usage Restrictions May use with photo credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.