Difference between revisions of "Remote Sensing"
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'''Remote Sensing''' is a generic term for types of satellite or high-altitude aviation imagery that contains bands outside of the visual spectrum, or uses a novel method of capturing images that the human eye would otherwise be unable to see.<blockquote>"Where we're going, we won't need eyes to see" - Sam Neill, ''Event Horizon''</blockquote> |
'''Remote Sensing''' is a generic term for types of satellite or high-altitude aviation imagery that contains bands outside of the visual spectrum, or uses a novel method of capturing images that the human eye would otherwise be unable to see.<blockquote>"Where we're going, we won't need eyes to see" - Sam Neill, ''Event Horizon''</blockquote> |
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| + | == How to get remote sensing data== |
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| + | As with most imagery, remote sensing data tends to fall into one of two categories: freely available and low resolution (to a technical user), or high quality and easy to use but ''absurdly'' expensive. If you have to ask ''how'' expensive, odds are you simply don't have the money.<ref>https://twitter.com/mouthofmorrison/status/1542290102696779778?s=20&t=z_hrdE0D7p42UFnGJHAJ0Q</ref> This is all to assume that you can even ''open'' the data and use it- the software to do so is either proprietary, clunky, or both.<sup>[''Citation NOT needed'' ''but provided anyways'']</sup><ref>https://twitter.com/mouthofmorrison/status/1547171655897726979?s=20&t=z_hrdE0D7p42UFnGJHAJ0Q</ref> |
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| + | However, as time goes on, more and more is slowly becoming available.<ref>https://apogeospatial.com/commercial-sar-comes-to-the-u-s-finally/</ref> ([[Todo]]: if anyone can figure out the prices for various providers, here would be a good place to put them) |
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| + | ===Free remote sensing data sources=== |
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| + | {{main|Free remote sensing data sources}} |
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| + | *NASA (EarthExplorer, various) |
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| + | *ESA (Sentinel-1) |
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| + | ===Paid remote sensing data sources=== |
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| + | * Capella (SAR) |
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| + | * Hawkeye 360 |
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| + | * ICEYE |
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| + | ==Types== |
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Many satellite imagery providers (e.g. Planet 0.5m) include NIR bands. NIR puts particular emphasis on plants and vegetation, and can be used to calculate A common method of analysis is to simply use the imagery as you would optical, but replace the "red" band (e.g. in Qgis) with the NIR data. |
Many satellite imagery providers (e.g. Planet 0.5m) include NIR bands. NIR puts particular emphasis on plants and vegetation, and can be used to calculate A common method of analysis is to simply use the imagery as you would optical, but replace the "red" band (e.g. in Qgis) with the NIR data. |
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| − | == |
+ | ===SAR=== |
todo |
todo |
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| − | == |
+ | ===Other=== |
todo: talk about how you can detect ice, snow, fire, etc. by doing veeery specific band math in e.g. qgis. Maybe write a guide on it? |
todo: talk about how you can detect ice, snow, fire, etc. by doing veeery specific band math in e.g. qgis. Maybe write a guide on it? |
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| + | == References == |
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[[Category:Introduction]] |
[[Category:Introduction]] |
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[[Category:Explanation Article]] |
[[Category:Explanation Article]] |
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[[Category:Remote Sensing]] |
[[Category:Remote Sensing]] |
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[[Category:Satellite Imagery]] |
[[Category:Satellite Imagery]] |
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| + | <references /> |
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Revision as of 07:11, 16 July 2022
Remote Sensing is a generic term for types of satellite or high-altitude aviation imagery that contains bands outside of the visual spectrum, or uses a novel method of capturing images that the human eye would otherwise be unable to see.
"Where we're going, we won't need eyes to see" - Sam Neill, Event Horizon
How to get remote sensing data
As with most imagery, remote sensing data tends to fall into one of two categories: freely available and low resolution (to a technical user), or high quality and easy to use but absurdly expensive. If you have to ask how expensive, odds are you simply don't have the money.[1] This is all to assume that you can even open the data and use it- the software to do so is either proprietary, clunky, or both.[Citation NOT needed but provided anyways][2]
However, as time goes on, more and more is slowly becoming available.[3] (Todo: if anyone can figure out the prices for various providers, here would be a good place to put them)
Free remote sensing data sources
- NASA (EarthExplorer, various)
- ESA (Sentinel-1)
Paid remote sensing data sources
- Capella (SAR)
- Hawkeye 360
- ICEYE
Types
NIR (Near-Infrared)
Many satellite imagery providers (e.g. Planet 0.5m) include NIR bands. NIR puts particular emphasis on plants and vegetation, and can be used to calculate A common method of analysis is to simply use the imagery as you would optical, but replace the "red" band (e.g. in Qgis) with the NIR data.
SAR
todo
Other
todo: talk about how you can detect ice, snow, fire, etc. by doing veeery specific band math in e.g. qgis. Maybe write a guide on it?