Terrain Analysis - LIDAR (3)

Terrain Analysis - LIDAR (2)

Terrain Analysis - LIDAR (1)

Supervised Classification

Unsupervised Image Classification

Rectification

Rectification is the process of converting images to a map coordinate system. The basic idea is to choose points on the image and hope that they will match points on the map. Rectification is a difficult task searching through the image and vice-versa the map. Sometimes the accuracy of the map points is not well known.

Remote Sensing - Residential Area Fort Worth

This is a pre-dawn image of a residential area of Fort Worth, Texas.

This module is about thermal infrared remote sensing and the word thermal relates to heat. Therefore thinking thermally, targets that emit heat are labeled "warm" and these targets will have a clear gray tone. Targets that do not emit sufficient heat are labeled "cold" and these targets will have a dark gray tone.

(1) Roads have a clear gray tone because heat is emitted from the asphalt. Roads retain heat throughout the night.

(2) Natural and man made vegetation do not retain heat at night, hence the dark gray tone.

(3) Sidewalks and Patios: Sidewalk is similar to road, it retains heat - clear gray tone. The dark gray tone patios are without heat from the patio-light and the clear gray tone patios are with heat from the patio-light.

(4) Storage sheds in back yards: Clear or dark gray tone depends on the type of material that was used during construction of the fore-named target.

(5) Automobiles: Those with dark gray tone ware parked during the night and those with clear gray spots were recently running. Heat from the engine and tires caused the clear gray spots.

(6) Bright spots on many roof tops: Most likely because of a skylight or a vent duct.