GEOG 105 Lecture 4: Week 4

• School: University of Illinois
• Department: Geography
• Course: GEOG 105
• Professor: J Cidell

Document Summary

Knowing place: unique location of a feature, meaningful location. Location (where), locale (what its made of), sense of place (how it feels) Location: latitude + longitude: graticule grid of lat + long, measured as angles from earth"s center. Length at equator : degrees 70 miles, minutes 1. 2 miles, seconds 100 feet. Spatial resolution: spatial size of object/ pixel, how fine your grid is, from meter to 10s of km, higher resolution = smaller pixels/ objects, human based data needs higher resolution. Spectral resolution: spectral which wavelengths, # of bands/ channels (1 224, every object has a spectral signature, more, narrower bands = higher resolution = more objects identifiable, ex for plants: water content, pigmentation, physiological structure. Temporal resolution: temporal how often data is collected, revisit period, hourly, daily, monthly, seasonally, yearly, necessary for tracking changes, depends on sensor + orbit. Image restoration (pre-processing: radiometric correct distortions from haze, malfunctions, geometric oblique, angle, map projection.