Unformatted text preview: o slightly smooths the layer 3. -.1 -.1 -.1 -.1 1.8 -.1 -.1 -.1 -.1 o slightly enhances local detail by giving neighbors negative weights • filters can be useful in enhancing detail on images for input to GIS, or smoothing layers to expose general trends Slopes and aspects • if the values in a layer are elevations, we can compute the steepness of slopes by looking at the difference between a pixel's value and those of its adjacent neighbors • the direction of steepest slope, or the direction in which the surface is locally "facing", is called its aspect o aspect can be measured in degrees from North or by compass points - N, NE, E etc. • slope and aspect are useful in analyzing vegetation patterns, computing energy balances and modeling erosion or runoff o aspect determines the direction of runoff this can be used to sketch drainage paths for runoff...
View Full Document
This note was uploaded on 12/04/2011 for the course GEB 1011 taught by Professor Staff during the Fall '08 term at Broward College.
- Fall '08