Jan 29, 2019
Kano, Nigeria, automated building footprint extraction using differential area profiles on the max-tree & min-tree dual scale space.
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Kano, Nigeria, automated building footprint extraction using differential area profiles on the max-tree & min-tree dual scale space.
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Vineyards of Valparaiso In this satellite photo the contours of the hillside are beautifully picked out by man made terraces upon which are resting grape vines irrigated by the waters of the Andes that produce on of Chile's main exports and some of my favourite tipples, including Carmenere. This type of grape was thought to have gone extinct early in last century when phyloxera ravaged the wines of the old world, transforming them forever (for the worse say the traditionalists). Rediscovered by chance by an open eyed person in a remote farmstead a couple decades ago, it has been replanted in France as well as serving as one of the country's best vintages. Loz Image credit: Digital Globe
CRS-13 launch operations seen from orbit as SLC-40 is reactivated. For the first time in over a year and a half, launch operations are once again taking place at Cape Canaveral’s SLC-40. SpaceX is preparing to launch their fourth and final resupply mission of 2017 to the International Space Station Friday, December 15 at 10:33am EST. The mission, which as originally scheduled to launch Tuesday, will carry nearly 5,000 pounds of supplies and experiments to the Expedition 53 crew. DigitalGlobe’s GeoEye1 satellite captured the Falcon 9 rocket with Dragon spacecraft horizontal at LC-40 on December 12 undergoing final checkouts before being raised vertical for Tuesday’s launch attempt. Check out our archived coverage of previous Falcon 9 vehicles and other rockets photographed from space by Earth imaging satellites by clicking here.
The Geoeye1 satellite to this great image. Thanks again @digitalglobe ・・・ Yes, you can take a selfie from space on #NationalSelfieDay! 📸 This giant portrait by @gerada_studio is called "Out of Many, One," a composite portrait of several people photographed in Washington, D.C. It was made of dirt and sand and displayed throughout October 2014. Taken with our #geoeye1 satellite! #nationalmall #art #landart #artoftheday #instart #artist #overview #aerial #aerialview #digitalglobe #vantagepoint #birdseyeview #viewfromabove #awesomeview #picoftheday #pictureoftheday #satelliteimage #satelliteimagery #rodriguezgerada #geradastudio
Unsupervised detection and delineation of informal human settlements in sub-Saharan Africa. The AFRICON method is part of the PROTOGEN software suite of GBDX @ DigitalGlobe. AFRICON delivers settlement delineation, coverage, built-up density, built-up density gradient (transitions of dense to less dense built-up areas), building footprints and distance maps
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protogen information layers @ GBDX, DigitalGlobe. From the top: (i) rgb view of the target region, (ii) land-use, land-cover layer, (iii) built-up extent layer, (iv) building footprints layer, (v) bare soil layer, (vi) vegetation layer and (vii) water layer.
As the ice melts, future rocks are being born
One thing that the gradual melting of the cryosphere is going to contribute to the geological record is a pulse of sediments that will take a variety of forms, from stones dropped by melting icebergs (and originally named dropstones) to the fine grained rock flour that is being carried into the sea by these braided rivers and waterfalls at the edge of Iceland's icecap. We can even see from way up in space that some braids of the lower streams are draining an area containing more sediment than the others. The plumes of sediment diffract the light nicely as they diffuse, giving the water its eerie bluish colour.
These sediments will reach the sea floor in time and will slowly turn into rock as further layers are piled above and the resulting heat and pressure expels the water and induces chemical reactions such those producing the common calcite or silica cements that bind many sedimentary particles together into rock. They will then sit for an indefinite time, until either some kind of tectonic uplift (such as a buoyant granite intruding below or a rise in the crust induced by a particularly hot bit of mantle passing under the plate) or a continental collision and attendant mountain building event exhume it back under the sky into the world of moving air and water again..
The particles of sediment were of course eroded by ice, wind and rain from the volcanic rocks that form the island (due to its position both on the Mid Atlantic ridge and above a probable mantle plume (see http://bit.ly/1FibMgN for an explanation)). Every rock has been through at least one, and often various iterations of this cycle in various forms. Some old high grade metamorphic rocks in cratons (see http://bit.ly/2n8hXhu) have been repeatedly overprinted by geological adventures, the information only teased out with complex and time consuming analysis.
As the world continues to warm with likely difficult consequences for us and much of the higher life with which we are (not)sharing the planet with over the next centuries followed by the millions years recovery time from a mass extinction, it's comforting to think that whatever happens, the rock cycle will endure for a good old time to come...
Loz
Image credit: Digital Globe_ _
Sydney LULC using WorldView 2,atmospherically compensated 8-band imagery
An improved algorithm for fully unsupervised Land-Use Land-Cover (LULC) generation using atmospherically compensated 8-band imagery from the WV2=< series. The method identifies natural elements only, i.e. vegetation, cloud, water, soil, shadows, etc.
Builtup is often the set difference between the sum of all classes the remaining pixels.