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Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map...

Date post: 29-Jan-2016
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Page 1: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

Geography

Page 2: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

What is a GIS?

• GIS stands for Geographic Information System

• A tool people can use to map and analyze geographic data

• Organizes data by where it occurs

Page 3: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

Why is Geography Important?

• Our activities and decisions involve location in some way

• Examples: – Where to buy bread on the way home from work– Where to build new roads or hospitals

Page 4: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

What is Remote Sensing?

• Geographers use pictures taken from satellites and sensors to help solve everyday problems.– Examples include aerial

imagery, infrared (IR) and microwave sensors, and sonar

Page 5: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

What agencies might use remote sensing?

• Weather forecasters• Foresters• Agriculture• Ocean researchers• Biologists• Polar researchers

Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE

Page 6: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

How can we use remote sensing?Some of the ways (but not all!)

we can use remote sensing:• Weather• Land use• Populations of organisms in

the ocean• Monitoring sea ice

Page 7: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

An example

• One way that remote sensing can be used is in tracking land use changes through time.

Page 8: Geography. What is a GIS? GIS stands for Geographic Information System A tool people can use to map and analyze geographic data Organizes data by where.

• Remote sensing can also be used to detect vegetation and land types and even natural disasters.

• When using an infrared (IR) sensor, vegetation appears bright red and is easy to spot.

• IR sensors also allow tornado tracks to be easily seen.

LANDSAT ETM+ IR composite image of

Delaware Inland Bays

Photo from NASA Science News; ASTER sensor


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