Timeline for Why are electric power lines so highly visible in satellite images? [closed]
Current License: CC BY-SA 4.0
15 events
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| Jan 23, 2020 at 9:27 | history | closed |
Vince Fran Raga whyzar Gabriel De Luca Jochen Schwarze |
Opinion-based | |
| Jan 23, 2020 at 9:27 | comment | added | Jochen Schwarze | And furthermore I guess the ones in your pictrure are at least 3 times higher than the house is. Them being closer to the camera might play a role also. | |
| Jan 22, 2020 at 21:24 | history | edited | Yojimbo | CC BY-SA 4.0 |
Add comments and new image.
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| Jan 22, 2020 at 19:24 | comment | added | user30184 | I mean that you can distinguish objects, especially linear ones like power lines and ditches, which are much smaller/narrower than the pixel size if their contrast to the surroundings is high enough. 1.5 inch power line can paint the whole 15 inch pixel as rather light. | |
| Jan 22, 2020 at 19:13 | comment | added | Yojimbo | @user30184 Not sure what you're saying here -- everything that we see with our eyes is reflected light, unless we're observing a light emitter. So we're seeing the wires in the same way that we see the grass, the roof of the houses, etc. | |
| Jan 22, 2020 at 19:06 | history | edited | Yojimbo | CC BY-SA 4.0 |
adjust the included image
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| Jan 22, 2020 at 18:35 | comment | added | user30184 | You do not see the wires in the image. It is obvious at the lower left corner where wires are above the white truck. But the shiny wires are reflecting so much light that the average value of the whole pixel turns into light grey and you can see the row of light pixels above the dark ground and vegetation. | |
| Jan 22, 2020 at 18:30 | review | Close votes | |||
| Jan 23, 2020 at 9:27 | |||||
| Jan 22, 2020 at 18:16 | answer | added | Kirk Kuykendall | timeline score: 0 | |
| Jan 22, 2020 at 18:09 | comment | added | Kirk Kuykendall | Perhaps some are not visible, and go unnoticed. | |
| Jan 22, 2020 at 18:07 | comment | added | Yojimbo | @Tom In my area, residential power lines are very close to 0.5" in diameter -- I just need to look out the window. | |
| Jan 22, 2020 at 18:04 | comment | added | Mapperz♦ | also distribution corridors are kept free from growth of vegetation including large trees... drones and helicopters can be also used to capture lidar/imagery for routine maintenance. | |
| Jan 22, 2020 at 18:00 | comment | added | Tom | These aren't satellite images, but aerial images taken from airplanes. Also, I think you're underestimating the diameter of power lines. 1.5" is roughly the width of the line to a single residence. | |
| Jan 22, 2020 at 18:00 | review | First posts | |||
| Jan 22, 2020 at 18:24 | |||||
| Jan 22, 2020 at 17:56 | history | asked | Yojimbo | CC BY-SA 4.0 |