Welcome to Methods 3, Lecture 12
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Methods 3
presentations
share how you're applying what we've covered in class
share your progress so far
15 minutes
I encourage you to make slides
screenshots of your process can be useful, too
cover
- project topic / goal
- roadblocks
cover
- project topic / goal
- roadblocks
- outcomes / successes
cover
- project topic / goal
- roadblocks
- outcomes / successes
- where the project is now
cover
- project topic / goal
- roadblocks
- outcomes / successes
- where the project is now
- future work
please submit presentation materials through Canvas
"I don’t want politicians to see these tiny libraries and think, ‘Oh, we don’t need the big public libraries.'"
source
how could we prove or disprove this?
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remote sensing
Landsat
the longest continuous satellite imagery collection program
Landsat is "earth observing", as opposed to people observing (spying)
1972: first Landsat satellite launched
1985: Landsat is privatized, run by Hughes and RCA
2001: Landsat fully returned to public hands
2007: all Landsat imagery becomes free
2013: Landsat 8 launched
Landsat imagery is used for:
- irrigated water monitoring
- irrigated water monitoring
- land cover mapping
- irrigated water monitoring
- land cover mapping
- land use change studies
- irrigated water monitoring
- land cover mapping
- land use change studies
- invasive species detection and monitoring
- irrigated water monitoring
- land cover mapping
- land use change studies
- invasive species detection and monitoring
- coastal wetlands monitoring
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resolution: how much area on the ground is represented by one pixel
if a satellite has 30m resolution, each pixel represents a 30m x 30m square
a smaller number for resolution is better
temporal resolution
how frequently does the satellite take a picture of a given location?
bands
satellites produce a number of images at different wavelengths
bands 2, 3, and 4 (blue, green, and red)
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band 6 and 7 (shortwave infrared)
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you will combine bands to suit your needs
LiDAR
light detection and ranging
LiDAR actively uses lasers and sees how long it takes for a reflection to arrive
like SONAR (sound) and RADAR (radio waves)