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Project 4

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... global archive of satellite photos, providing up-to-date and cloud free images. ... World Wind project allows 3D images from Landsat 7 and other sources ... – PowerPoint PPT presentation

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Title: Project 4


1
Project 4
  • Finding Landsat Data

Mississippi Coast Before and After Hurricane
Katrina
2
Landsat Information
  • The Landsat program is the longest
    running program for acquisition of imagery of
    Earth from space. The first Landsat satellite was
    launched in 1972 the most recent, Landsat 7, was
    launched on April 15, 1999.
  • Landsat 5 is the fifth satellite of the Landsat
    program. It was launched on March 1st, 1984, with
    the primary goal of providing a global archive of
    satellite photos. The Landsat Program is managed
    by USGS, and data from Landsat 5 is collected and
    distributed from the USGS's Center.
  • Landsat 7 is the latest satellite of the Landsat
    program. It was launched on April 15th, 1999. The
    primary goal of Landsat 7 is to refresh the
    global archive of satellite photos, providing
    up-to-date and cloud free images. Although the
    Landsat Program is managed by NASA, data from
    Landsat 7 is collected and distributed by the
    USGS. The NASA World Wind project allows 3D
    images from Landsat 7 and other sources to be
    freely navigated and viewed from any angle

3
Unique Qualities
  • Takes clear pictures of earth from 570 miles out
    in space.
  • Follow instructions from computers down on earth.
  • Work in the extremely cold temperatures in space.
  • Last for many years.
  • It takes pictures only in the day time. That
    makes sense since using a flash camera from 570
    miles away just won't work
  • Each full picture it takes equals 13,000 square
    miles. That is an area about 115 miles long by
    115 miles wide. 
  • Landsat can also look at smaller areas of the
    earth. How's this for small? 210 square feet
    which is about 14 1/2 feet by 14 1/2 feet.
  • Landsat completes a full orbit around the earth
    every 103 minutes.
  • LANDSAT takes 16 days to take its pictures of the
    entire earth. Then it begins taking pictures all
    over again.

4
How does Landsat work?
  • High scale photos from satellite imagery
  • Uses a mirror that scans a particular section of
    land. Light is radiated from the ground bounces
    off of mirror onto a series of 4 light detectors.
  • Form of pixels beyond human wavelength spectrum

Landsat Satellite
5
Application
  • Landsat data can be used by government,
    commercial, industrial, civilian, military, and
    educational communities worldwide.
  • The data support a wide range of applications in
    such areas as global change research,
    agriculture, forestry, geology, resource
    management, geography, mapping, water quality,
    and oceanography.
  • Landsat consistency over three decades offers
    opportunities to compare land cover changes over
    time.
  • Valuable for emergency response and disaster
    relief. Advances made in data reception and
    processing permit rapid access to imagery in
    times of natural or human-made disaster.

6
Using the EarthExplorer Software
http//earthexplorer.usgs.gov
7
Upon accessing the site sign yourself in under
GUEST
8
Click on ENTER PLACE NAME
Once you hit search the coordinates will show up
in the previous screen
Enter the City Name and then Select the State
9
Scroll down the Data Set Selection and click on
the Landsat 7 ETM
10
Allow this screen to load (it refreshes itself
every 10 seconds)
11
  • Choose the most recent photo with the least
    amount of cloud cover
  • Click Show to see your image
  • To get your metadata click on show all fields

12
Metadata
13
For Prices Click on the Prices Option at he top
of the page
14
Click on Landsat ETM
15
After completing the EarthExplorer program you
will have all the components necessary to
complete your project webpage.
16
Sources
  • http//earthexplorer.usgs.gov
  • http//campus.esri.com
  • http//landsat.usgs.gov/history.html
  • http//library01.gsfc.nasa.gov/gdprojs/images/land
    sat.jpg
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