Markers to color acetate for each student. GIS is a system of hardware, software, data, people, organizations and institutional arrangements for collecting, storing, analyzing, and disseminating information about areas of the earth. GIS uses layers and layers of information which can be stored and then displayed as a map. Things that were once thought impossible to combined now can be. GIS helps put information together to answer questions.
Raster uses layers upon layers of information that line up with each other to produce a map.
Raster mapping can be a very precise, because of this layered approach. The system consists of a digital map having roads, streets, boundaries, landmarks, and an integrated database. This map can be displayed on a computer monitor and printed out. Graphic symbols are placed on the map to represent various objects, like houses, utility poles, electrical devices, cables etc. Literally any inside or outside type of object can be represented by symbols on the map.