GGR272H1 Study Guide - Final Guide: Sea Level, Geographic Coordinate System, North American Datum
Document Summary
Where is it and the data that you attach to a location. Way of organizing and representing data that are simplified versions of reality. You start basic and collect longitude and latitude. Point, it has a coordinate, small point on the surface of the either. Fields: columns some features may be represented with a line or an actual area. It is important to think about the scale. As you zoom in closer and closer you get a small square called a cell, Trying to represent continuously when really breaking down into smaller squares. In every grid cell you have to decide that number. Coordinate system used in raster grid, rows and columns. A point, lines to represent a river and polygon to represent a park; when you add a raster over it, you can no longer access that distinct feature. When we"ve been talking in general terms like a map layer, the more technical term is feature class.
