The Geographer’s Tools Chapter 1 Section 2

Maps and Globes Two or Three Dimensions –Maps purpose is show locations on the earth and where they are in relationship to others around them in 2-D All maps are distorted therefore many map projections are created by cartographers to represent the round earth on a flat surface –A globe is a 3-D representation of the earth. View of the earth as it sits in space Not practical to carry with your or to see locations close up

Different Types of Maps Topographic maps: shows the natural and man-made features on the earth Also known as general purpose maps

Different Types of Maps Thematic maps: emphasize specific kinds of information, such as climate or population density

Different Types of Maps Navigation maps: used by sailors and pilots

Science of Mapmaking Surveying maps –Field Surveys –Aerial Photography –Satellites

Science of Mapmaking Satellites –Landsat maps: series of satellites that orbit the earth can map the earth in 16 days

GOES (Geostationary Operational Environment Satellite): is a weather satellite and it maintains a constant view of specific places on the earth. Science of Mapmaking

GIS (Geographic Information Systems) –Information is stored in layers and allows the viewer to see a specific location from different view points. –Uses maps –Aerial photos –Satellite images –Other data (Google Maps is an example of a program using GIS)

Science of Mapmaking GPS (Global Positioning Systems) –Originally for military –24 satellites Navstars –Exact latitude, longitude, altitude, and time is sent to a receiver –Many people use GPS receivers or apps on their smart phones to find an exact location of a place or can be used to track a transmitter

THE END The Geographer’s Tools Chapter 1 Section 2