GEOG372 Lecture Notes - Lecture 3: Polygonal Chain, Spatial Analysis, Grid Cell

• School: University of Delaware
• Department: Geography
• Course: GEOG372
• Professor: jonathan Daeden

Document Summary

Short (16-bit) and long (32-bit) storage, ascii. The basis of almost all modern human communication. Can be handled in in ways independent of meaning/ easy to copy and transmit, stored high density, easy to transform, process and analyze. One of the most import criteria for the usefulness of a representation is its accuracy. Geographic data built up from atomic elements or facts about geographic world. At most primitive: an atom of geographic data links place, time, and descriptive property. Fundamental problem is world is infinitely complex, but computer systems are finite . In this view, world is empty except objects with well defined boundaries. Ability of gis to handle truly 3d objects as volumes w associated surface is limited. Ex for representing overpasses and underpasses or topography. World is described in a number of variables. Property can be of any attribute type, including direction.