Spatial in Schools
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Spatial in Schools
Relevant links and resources for teachers using spatial technologies in their classrooms.
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Image Analysis

Image Analysis | Spatial in Schools | Scoop.it
One of a number of large wildfires that have affected northern California in 2012, the Chips fire burned more than 75,000 acres by the time firefighters had contained it.

 

2012 is going to go down as the year in United States history as the year with the most acrec burned in a single year (statistics only go back to 1960).  The two featured images were taken earlier this month to display a Northern California wildfire; both with the same spatial resolution and acquired for the same instrument (Advanced Land Imager on EO-1 satellite), yet they are quite distinct.  One shows an aerial photograph, displaying exactly what standard visible portion of the electromagnetic spectrum (showing us what our eyes would normally see).  The other image displays a false color (near infrared) image. 

 

Questions to ponder: what advantages does each image have for analyzing the fire damage?  Drawbacks?  How does the data from both images work together to create a more complete picture of the situation?     

 

Tags: remote sensing, images, environment, land use, disasters, biogeography. 


Via Seth Dixon
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Lisa Fonseca's comment, September 17, 2012 10:22 AM
The first image displays a better visual of exactly where the fire damaged the land, the second image doesn't provide a clear visual to someone, the land effected is foggy. If I was going to visit this specific area in Northern California I would much rather use the first aerial image.
Jesse Gauthier's comment, September 17, 2012 10:31 AM
The first image gives a good spatial shot of where the exact hot spots are located that cannot be seen by the naked eye. The second photo will give you a spatial view of what you can actually see. Both are needed to put out the hot spot because they each will provide two different solutions to stop the burning acres.
Seth Dixon's curator insight, September 25, 2013 8:33 AM

2012 is going to go down in United States history as the year with the most acres burned in a single year (statistics only go back to 1960).  The two featured images were taken earlier this month to display a Northern California wildfire; both with the same spatial resolution and acquired for the same instrument (Advanced Land Imager on EO-1 satellite), yet they are quite distinct.  One shows an aerial photograph, displaying exactly what standard visible portion of the electromagnetic spectrum (showing us what our eyes would normally see).  The other image displays a false color (near infrared) image. 


Questions to ponder: what advantages does each image have for analyzing the fire damage?  Drawbacks?  How does the data from both images work together to create a more complete picture of the situation?     


Tags: remote sensing, images, environment, land use, disasters, biogeography.

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NASA Earth Observatory - Vegetation Index

The NDVI (Normalized Digital Vegetation Index) is on of the primary methods for detecting healthy vegetation using satellite imagery.  This also serves as a useful way to distinguish between distinct ecological and agricultural regions and the temporal patterns of planting seasons.  

 

This video was found on a site titled "Explorations in agricultural research" with many great links http://zerogravitygardening.blogspot.com/


Via Seth Dixon, Michelle Kinzel
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