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Maybe interesting to the HN crowd: https://www.20tree.ai/ https://www.20tree.ai/. Startup doing ML on satellite images to recognize trees, crop health and a bun

by WJW 7y ago

Maybe interesting to the HN crowd: https://www.20tree.ai/ https://www.20tree.ai/. Startup doing ML on satellite images to recognize trees, crop health and a bunch of other stuff.

anfractuosity 7y ago
Neat, will have to read what they're doing. I've heard of this simple approach before - https://en.wikipedia.org/wiki/Normalized_difference_vegetation_index https://en.wikipedia.org/wiki/Normalized_difference_vegetati... using the ratio of IR / red light. It sounds like they have very high resolution imagery though "up to 0.3m resolution", which sounds cool.
- saystupidthings 7y ago
  That's a simple rules based approach and any undergraduate can click a couple buttons and classify land cover with different spectral reclectances (at X wavelength) on a pixel or superpixel basis. The more interesting stuff is when you feed this information into ML
paganel 7y ago
Do you happen to know if there's anything similar for trying to extract similar stuff (i.e. forests-related information) from older paper-maps which have by now been digitised? For example the old (old as in from the 1950s-1960s) Soviet maps for my country (Romania) are quite accurate, you can quite clearly see the extent of forests back then, and I think it'd be helpful if one could extract that information in an "automated" way. For those curious the maps can be accessed here [1] by selecting the "Harti sovietice 50k" layer and by de-selecting the default layer, called "Planurile directoare" (there's a menu button on the top-left corner of the screen). [1] http://www.geo-spatial.org/harti/#/viewer/openlayers/10 http://www.geo-spatial.org/harti/#/viewer/openlayers/10
- WJW 7y ago
  I'm not sure the technologies are quite compatible, since the site you linked to has actual maps rather than satellite imagery. That said, it seems like something ML/computer vision should be able to do, although I'm not good enough at either ML or GIS tools to do it myself.
saystupidthings 7y ago
I do this but make millions less as a graduate student. Time to reconsider my life choices

by WJW 7y ago

Maybe interesting to the HN crowd: https://www.20tree.ai/ https://www.20tree.ai/. Startup doing ML on satellite images to recognize trees, crop health and a bunch of other stuff.

anfractuosity 7y ago

Neat, will have to read what they're doing. I've heard of this simple approach before - https://en.wikipedia.org/wiki/Normalized_difference_vegetation_index https://en.wikipedia.org/wiki/Normalized_difference_vegetati... using the ratio of IR / red light. It sounds like they have very high resolution imagery though "up to 0.3m resolution", which sounds cool.

saystupidthings 7y ago
That's a simple rules based approach and any undergraduate can click a couple buttons and classify land cover with different spectral reclectances (at X wavelength) on a pixel or superpixel basis. The more interesting stuff is when you feed this information into ML

paganel 7y ago

Do you happen to know if there's anything similar for trying to extract similar stuff (i.e. forests-related information) from older paper-maps which have by now been digitised? For example the old (old as in from the 1950s-1960s) Soviet maps for my country (Romania) are quite accurate, you can quite clearly see the extent of forests back then, and I think it'd be helpful if one could extract that information in an "automated" way. For those curious the maps can be accessed here [1] by selecting the "Harti sovietice 50k" layer and by de-selecting the default layer, called "Planurile directoare" (there's a menu button on the top-left corner of the screen). [1] http://www.geo-spatial.org/harti/#/viewer/openlayers/10 http://www.geo-spatial.org/harti/#/viewer/openlayers/10

WJW 7y ago
I'm not sure the technologies are quite compatible, since the site you linked to has actual maps rather than satellite imagery. That said, it seems like something ML/computer vision should be able to do, although I'm not good enough at either ML or GIS tools to do it myself.

saystupidthings 7y ago

I do this but make millions less as a graduate student. Time to reconsider my life choices