GPY 407 Study Guide - Final Guide: Digital Elevation Model, Raster Graphics, Georeferencing
Document Summary
Term used to describe the range of modern tools contributing to the geographic mapping and analysis of the earth and human societies. A gis computer system is used for capturing, storing, querying, analyzing and displaying geospatial data. A gis works by combining database functions with computer mapping to map and analyze geographic data. It uses a layering technique to combine various types of data. Spatial data - information about a physical object that can be represented by numerical values in a geographic coordinate system. Attribute data - qualitative data that can be counted for recording and analyses. Discrete features - features that have known and definable boundaries. Continuous features - features that have no known or definable boundaries (temperature ) Vector model - a representation of the world using points, lines, and polygons. Models are useful for storing data that has discrete boundaries, such as country borders,
