1. Technology and Mapmaking
Chapter 1 Lesson 2
Technology and Mapmaking

2. Lesson 2 Vocabulary
Cross section – shows vertical slice through rocks below the Earth’s surface.
Elevation – height above sea level
Geologic map – shows the surface geology of an area
Relief – difference in elevation between the highest and lowest point
Remote sensing – collecting information about an area without being there
Slope – measured steepness of the land
Topographic map – shows detailed shapes and natural and human- made features of Earth’s surface

3. Types of maps Physical maps show features such as mountains and lakes
Relief maps use shading and shadows to show mountains and flat areas.
Political maps show boundaries between countries, states, and townships.
Road maps are used by people to find their way from one place to another
Topographic map shows the natural features of Earth’s surface as well as many of its detailed shapes.
A. The legend on a topographic map describes the symbols used on the map.

4. Maps Geologic maps show the surface geology of an area.
A. Different formations on a geologic map re shown by different colors and symbols.
B. Geologists use cross section, a type of diagram to show a vertical slice through rocks below the surface

5. Making Maps Today
1. Today, people use computers and data from satellites to make maps.
2. The Global Positioning System (GPS) is a group of satellites use for navigation.
A. A GPS receiver uses signals from several satellites to calculate its location.
B. GPS is used for navigation by people in airplanes and ships.
3. A geographic information system stores and analyzes data sent to it, usually by GPS.
A. Mapmakers use this data to create digital maps.
B. GIS creates different map layers of the same location

6. Making Maps Today
4. When you collect information about an area without having physical contact with it, you use remote sensing.
A. Much remote-sensing information used to make maps is not supplied by satellites.
B. One important use of remote sensing it to detect change over time in an area.
5. The series of satellites known as Landsat scans Earth’s entire surface every 16 days.
A. Using this data to study wetlands helps scientists follow climate changes and bird populations.
6. Sound is used to map the ocean floor when Sea Beam sonar is used from a ship.