Difference between revisions of "Shuozhang insights"
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As X=0, Y=0 refers to the pixel in the upper-left corner of the image, the Y-coordinate should be reversed. | As X=0, Y=0 refers to the pixel in the upper-left corner of the image, the Y-coordinate should be reversed. | ||
| − | The B1 penetrates water and B5 absolutely absorbed by the water, the area that shows a large number of B1 and B5 is more likely to be the water body. The chart of B1 and B5 shows that the Boonsong Lake is roughly in the upper middle of the image. The length of the lake approximately covers from upper left of the lake: X= | + | |
| − | + | The B1 penetrates water and B5 absolutely absorbed by the water, the area that shows a large number of B1 and B5 is more likely to be the water body. The chart of B1 and B5 shows that the Boonsong Lake is roughly in the upper middle of the image. The length of the lake approximately covers from upper-left of the lake: X=150.1, Y=474.9 to bottom-right of the lake: X=158.9, Y=502.4. Then the length of the pixel is around 28.9 which means 28.9 is corresponding to 3000 feet in the real situation which means 1 pixel-length is 103.8 feet. | |
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| + | Therefore, one pixel covers 103.8*103.8=10774 square feet, nearly 10.8 thousand square feet. | ||
== Features in the Image == | == Features in the Image == | ||
Revision as of 23:05, 7 July 2017
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Boonsong Lake
As X=0, Y=0 refers to the pixel in the upper-left corner of the image, the Y-coordinate should be reversed.
The B1 penetrates water and B5 absolutely absorbed by the water, the area that shows a large number of B1 and B5 is more likely to be the water body. The chart of B1 and B5 shows that the Boonsong Lake is roughly in the upper middle of the image. The length of the lake approximately covers from upper-left of the lake: X=150.1, Y=474.9 to bottom-right of the lake: X=158.9, Y=502.4. Then the length of the pixel is around 28.9 which means 28.9 is corresponding to 3000 feet in the real situation which means 1 pixel-length is 103.8 feet.
Therefore, one pixel covers 103.8*103.8=10774 square feet, nearly 10.8 thousand square feet.
Features in the Image
Changes in the Features
Compare the Images of June:
Compare the Images of September:
