OpenStreetMap
what are these oddly shaped circular features?
rayKiddy님이 English로 2014년 10월 17일에 게시함. 최근 2014년 10월 23일에 업데이트됨.I am editing in HOT task “#672 - Ebola Outbreak, Port Loko, Bombali districts, road network”, and I am seeing these odd somewhat circular features on the ground. This screenshot is about 600 ft (180 m) wide. Groups of them look a bit like honeycombs. What are these?
I suspect that they are man-made and are something agricultural, but I am also not seeing buildings nearby. So, it is not clear. The line is a tertiary road and probably not paved. Any guesses?
토론
2014년 10월 18일 07:10에 BCNorwich님의 의견
Hi. A link to the area of your screenshot would help, also what is the image layer, please? Looking close at your image I would suggest that the larger blobs are palm trees you can just make out fronds. Each throwing a shadow to the SSW, the shadow of the trunks are also visible. As to the smaller lighter blobs they are shaded to the SSW side suggesting they are not high enough to cast a remote shadow on the ground. The blobs also seem to be equally spaced. Yes I think some form of agriculture. Regards
2014년 10월 18일 13:54에 Sanderd17님의 의견
It could also be the work of termites. I don’t know which (if any) termites live in that region, but some sorts of termites are able to create surprisingly regular patterns in their mounds.
2014년 10월 19일 00:26에 GEOSPEX님의 의견
Hi rayKiddy, Several people in NYC for ebola mapping were in this tile today, and it did come up in discussion. Since this pattern shows up across this particular tile and others nearby, it seems likely that it is agriculturally related; that is, some type of crop on attended terrain. Exactly what that crop is, verdict still out.
2014년 10월 19일 12:49에 Firefishy님의 의견
It is most likely agricultural of some sort. At a guess each circle is land cleared to tend to a single plant… Cassava or other tuber.
2014년 10월 19일 12:53에 Firefishy님의 의견
Possible ground image: http://www.trust.org/item/?map=climate-change-adaptation-through-cassava-planting/
2014년 10월 19일 12:57에 Firefishy님의 의견
Better ground image: http://www.flickr.com/photos/79738474@N06/9509087914
2014년 10월 20일 01:21에 kucai님의 의견
my guess would be a cemetery. (really, not a spin on the ebola thing)
2014년 10월 20일 06:18에 Firefishy님의 의견
Could be… Image of graves: http://blogs.cfr.org/campbell/files/2011/01/africa-jos-graves-1_20_11.jpg
2014년 10월 20일 08:43에 Vincent de Phily님의 의견
I’ve usually mapped those as orchards. They’re a bit too low for palm trees. My guess is pineapple, but don’t quote me on that.
As for there being no paths to reach the area, remember that main access is by foot and is often not visible from imagery.
2014년 10월 22일 22:05에 rayKiddy님의 의견
Someone mentioned these in an e-mail to a HOT list. It is apparently cassava.
See: