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  1. Today
  2. Land cover classification remains challenging. However, more very high-resolution images are available to create quality reference data. In addition, efforts to improve transparency and accountability in the machine learning model are becoming an important research topic. I have published a book on ‘Data-centric Explainable Machine Learning for Land Cover Classification: A Practical Guide in R.’ The book is for those interested in improving land cover classification using a data-centric explainable machine learning approach. If you want to learn more about the book, please check the information at https://aigeolabs.com/moving-beyond-the-geospatial-machine-learning-hype/
  3. Last week
  4. what 3d globe you want? ArcGIS desktop has own dedicated 3d globe like apps, called ArcGlobe or maybe you want to use google earth? that's also using globe apps maybe you need to specify what 3D globe apps you want to use
  5. An underwater volcano off Tonga erupted on Saturday, triggering tsunami warnings and evacuation orders in Japan and causing large waves in several South Pacific islands, where footage on social media showed waves crashing into coastal homes. Japan's meteorological agency issued tsunami warnings in the early hours on Sunday and said waves as high as three metres (9.84 feet) were expected in the Amami islands in the south. Waves of more than a metre were recorded there earlier. Public broadcaster NHK said no damage or casualties had been reported, interrupting its regular programming to report on the tsunami advisory spanning the entire eastern coast of the Japanese archipelago issued by the country's meteorological agency. In a briefing, a Japan Meteorological Agency official urged people not to go near the sea until the tsunami advisory and more serious tsunami warnings had been lifted. The warnings - the first in more than five years - covered several specific areas. He said the change in sea levels observed did not follow a familiar pattern of tsunamis following earthquakes. "We do not know yet whether these (waves) are actually tsunami," he told the briefing. Tsunami waves were observed in Tonga's capital and the capital of American Samoa, a U.S.-based tsunami monitor said, following the eruption at 0410 GMT of the Hunga Tonga-Hunga Ha'apai underwater volcano. The volcano, which lies about 65 km (40 miles) north of Nuku'alofa, caused a 1.2-metre (four-foot) tsunami wave, Australia's Bureau of Meteorology said. The bureau said it continued to monitor the situation but no tsunami threat had been issued to the Australian mainland, islands or territories. Tsunami waves of 83 cm (2.7 feet) were recorded by gauges in the Tongan capital of Nuku'alofa and two-foot waves were seen at Pago Pago, the capital of American Samoa, the Pacific Tsunami Warning Center said. Fiji issued a tsunami warning, urging residents to avoid the shorelines "due to strong currents and dangerous waves". Jese Tuisinu, a television reporter at Fiji One, posted a video on Twitter showing large waves crashing ashore, with people trying to flee in their cars. "It is literally dark in parts of Tonga and people are rushing to safety following the eruption," he said. There were no immediate reports of casualties. In New Zealand, the emergency management agency issued an advisory on tsunami activity for the country's north and east coasts, forecasting strong and unusual currents and unpredictable surges along shorelines in those areas. On Friday, the volcano sent ash, steam and gas up to 20 km (12 miles) into the air, Tonga Geological Services said in a Facebook post. It has a radius of 260 km (160 miles). A tsunami advisory was also in effect for the U.S. and Canadian Pacific coast, the Pacific Tsunami Warning Center in Honolulu said. The National Weather Service said tsunami waves along the Oregon and southern Washington coast were expected imminently. High waves were reported in Alaska and Hawaii earlier. In the San Francisco Bay Area of northern California, small parts of the cities of Berkeley and Albany near the bay were ordered to evacuate. source: reuter
  6. Hi. What is a basic method to export worldmap layers such as coastlines, but wrapped on a 3d globe, for further use with computer graphics tools ?
  7. Earlier
  8. Please can my account be re-activated. I'm back into GIS now.
  9. Mount Semeru, the tallest and most active volcano on the Indonesian island of Java, has routinely spit up small, mostly harmless plumes of ash and gas for years. The circumstances changed on December 4, 2021. Following a partial collapse of the summit lava dome early in December, sensors began to detect elevated seismic activity, according to the Volcanological Survey of Indonesia (PVMBG). After more of Semeru’s lava dome gave way, billowing fronts of superheated ash, tephra, soil, and other debris raced down several channels on the mountain’s southeastern flank. Pyroclastic flows are among the most dangerous hazards posed by volcanoes. Sometimes accelerating to speeds of hundreds of kilometers per hour, these masses of volcanic material and landscape debris can be impossible to outrun. They destroy most living things in their path. Though explosive eruptions at the summit were likely small, the pyroclastic flows at Mount Semeru on December 4 were still hot enough that they likely helped propel a billowing “Phoenix cloud” that rose as high as 15 kilometers (9 miles) into the air. Since heavy rains preceded and accompanied the eruption, the pyroclastic flows mixed with large amounts of rainwater and morphed into muddy lahars that rushed down the mountain into populated areas. Lahars are mixtures of water and volcanic debris that behave like rivers of concrete, flattening or burying much of what they encounter. The damage proxy map above shows areas on the surface that were likely damaged by pyroclastic flows and lahars in December 2021. Dark red pixels represent the most severe damage, while orange and yellow areas are moderately or partially damaged. Each colored pixel represents an area of 30 meters by 30 meters (about the size of a baseball infield). Researchers from the The Earth Observatory of Singapore - Remote Sensing Lab (EOS-RS) made the maps by comparing a post-eruption image from December 7, 2021, with a set of pre-eruption images from August 9, 2021, through November 21, 2021. The slurry of debris that swept down Semeru proved catastrophic to villagers living around the mountain’s base in the Lumajang Regency, particularly Curah Kobokan. According to The Jakarta Post, at least 39 people have died. Large numbers of homes were destroyed or damaged, and many animals are among the eruption’s victims. The maps were derived from synthetic aperture radar (SAR) images acquired by the Copernicus Sentinel-1 satellites, operated by the European Space Agency (ESA). The researchers used the Advanced Rapid Imaging and Analysis (ARIA) system originally developed at NASA’s Jet Propulsion Laboratory, California Institute of Technology, and modified at EOS-RS. The ARIA team is supported by NASA’s Earth Science Disasters Program.
  10. with free account i assume you cant host the previous storymaps? im not familiar with arcgis online lisence
  11. Hi, thanks for your response, I have a one-year ArcGIS for Desktop Student Trial licence, which I got from one of the Coursera lessons. It will be expiring in a few weeks. I think I actually managed to save my work though, despite Esri Support telling me that all my content will be deleted and that my only option is to purchase an "ArcGIS for Personal Use license" at $100/year... Nobody ever mentioned to me this possibility and I never realised it, but I can actually create an ArcGIS Public Account! "An ArcGIS public account is a free account designed for personal, non-commercial use. With a public account you can: Create, store, and manage maps, scenes, layers, apps, and other geospatial content. Share content with others. Access content shared by Esri and GIS users around the world." So, one can actually do a lot of stuff with this free account! This is perfect for me, I just need this type of account to store my content, that's it.
  12. really nice storymaps my friend, btw, what is your current licence for your arcgis storymaps? https://doc.arcgis.com/en/arcgis-storymaps/reference/licensing.htm
  13. Dear GIS users/colleagues, I have been learning how to use GIS and more specifically ArcGIS for more than a year (online course). I was able to build in my free time a portfolio of maps on topics which interest me or are related to my area of expertise. I displayed most of them in a StoryMap online, which I intend to use as my online portfolio to showcase my work to potential future employers. The only issue is that, my ArcGIS licence is expiring soon (end December/early Jan). I contacted ESRI and they confirm that I am definitely going to loose all my content, StoryMaps included. Here is the StoryMap link, it's public anyway ;) https://storymaps.arcgis.com/stories/51b554201f464aea842d201c0020d88d After a bit of research, I was able to find a way to copy a StoryMap from one account to another, with a Python script. I tested it from my main ArcGIS account to another trial account created for this (lasts only 21 days) -> I invite to see how simple and safe it is. https://youtu.be/8J6Be1l31nE My request is simple. I am looking for a gentle soul, with a licence, who would be kind enough to host my creation, so that it just remains there on the cloud, with a permanent link which is not going to get deleted, and for everyone to see if/when they desire. Thank you in advance for your help :) Julien
  14. maybe for interest for other users : ALOS 30m DSM data : https://www.eorc.jaxa.jp/ALOS/en/aw3d/index_e.htm https://www.eorc.jaxa.jp/ALOS/en/aw3d30/data/index.htm
  15. Selecting the best Earth Observation (EO) optical payload for a satellite can be a defining choice for a research mission or commercial service. But with more models on the market than ever before, combined with innovation and supply chain changes in satellite buses, form factors, and sub-systems, making the right choice of EO camera can be difficult. In this webinar we delve into the factors that need to be weighed up during the selection process, featuring expert insights from 6 different camera suppliers. Register here to attend - https://us06web.zoom.us/webinar/register/WN_K-JHdbnmQtyVHkXg0iV7Xw
  16. Impressive tech. It has 1tb ssd and can fly over 40 minutes. Peter McKinnon took some amazing landscape footages.
  17. A new study published today by journal PLOS ONE has revealed that mountaintop removal mining poses a more serious and widespread threat to endangered species and people than was previously understood. The researchers from Defenders of Wildlife's Center for Conservation Innovation (CCI) and conservation technology nonprofit SkyTruth, combine water-quality data with satellite imagery of mountaintop removal mining activity to estimate the full extent of water-quality degradation attributable to the practice at the landscape level. "This research really emphasizes the interconnectedness of ecosystems and how distant human activity can have ripple effects that aren't immediately apparent," said CCI's Senior Conservation Data Scientist Mike Evans. "Being able to assess impacts at a landscape scale opens a completely new door for conservation." Mountaintop removal is a coal-mining method that clearcuts forests and then uses explosives to remove top soil and bedrock, which is often dumped in nearby valleys. The method's negative impacts on water quality is well known, but this research is now revealing the extent of the damage. The research found that chronic and acute toxicity thresholds for chemicals like aluminum, copper, lead and manganese as well as acidity levels in streams were exceeded thousands of times—including in areas of critical habitat—far removed from where the mines actually are. Previously, it was thought impacts were contained to the immediate area around mines. The study combined 30 years of satellite imagery data that mapped large surface mines in central Appalachia and water-quality measurements from more than 4,000 monitoring sites across different watersheds. "We have been watching mountaintop removal mining expand across the Appalachian landscape for years using satellite imagery," said Christian Thomas, geospatial engineer with SkyTruth. "By combining our imagery with water-quality data, we have finally revealed how profoundly this activity harms sensitive aquatic species." Central Appalachia is a highly biodiverse region and the streams impacted by these mines contain many threatened and endangered species, including 39 mollusk species, 12 fish, as well as crustacean and snail species. The region includes parts of Kentucky, Tennessee, Virginia, and West Virginia where this mining often occurs. "More than 50 federally protected species inhabit the streams of this region, and we haven't historically known the full impact of these mines, until now," said Evans. "This research expands the ability for state and federal agencies to make better decisions that directly affect vulnerable people and wildlife." The results of this study and the same methods can now be used to improve protections for imperiled species and provide a more rigorous scientific standard for mine permitting practices going forward by representing "best-available science," the legal standard required under the Endangered Species Act. source: https://phys.org/news/2021-11-mountaintop-worse-endangered-species-thought.html
  18. DJI is best known for drones, but it's possibly the most inventive camera company right now. After unveiling the outrageous full-frame Ronin 4K camera/gimbal last month, it has now launched the $2,200 Mavic 3 drone with not just one, but two innovative camera systems. As rumored, there are two models in the Mavic 3 family, the Standard and Cine models, along with a "Fly More" combo that bundles more accessories. The main difference is that the Mavic 3 Cine has a built-in 1TB SSD and supports Apple ProRes 422 HQ video recording — highly desirable for professional film productions. The latter is also considerably more expensive, as I'll discuss shortly. The Mavic 3's main 24mm (35mm-equivalent) f/2.8 - f/11 Hasselblad-branded camera has a Four Thirds sensor that's considerably larger than the 1-inch sensor on the current Air 2S model. And yet, the camera module doesn't look much bigger and the Mavic 3 weighs slightly less than the Mavic 2 (895g compared to 907g). Four Thirds is the same size as the Micro Four Thirds sensor on Panasonic's BGH1 box camera, for example, so it should allow for more cinematic video and photos. The variable aperture, along with optional ND filters, will make it easier to shoot in a variety of lighting conditions. It also comes with a new autofocus system called Vision Detection that supposedly optimizes focusing speeds. With the main camera, it now shoots 5.1K video at 50fps, or 4K at 120 fps — up from 5.4K 30fps and 4K/60p video on the Air 2S. DJI claims a native dynamic range of 12.8 stops, thanks to the 10-bit D-Log color profile. As for still images, it can shoot 20-megapixel photos in 12-bit RAW. If you need to get in much, much closer, DJI has squeezed in a second camera directly above the main camera. This one has a half-inch 12-megapixel sensor and 162mm tele lens (35mm equivalent), which is around a 4X zoom, or claimed 28X hybrid zoom. The aperture is fixed at f/4.4, and it offers strictly automatic, rather than manual exposure control. It can capture 4K video at up to 30 fps. DJI has confirmed that the Mavic 3 will have up to 46 minutes of autonomy in ideal conditions (40 minutes of hover), as leaks had suggested. That's up pretty massively from the Mavic 2 Pro or Air 2S, both of which offer 31 minutes of flying time. It can also fly a bit faster too, at 47 MPH compared to 45 MPH. Those capabilities were enabled by a higher-capacity battery, more energy-efficient motors/propellers and a more streamlined shape on the Mavic 3's arms, body and gimbal. "Wind tunnel testing shows Mavic 3 produces 35 percent less drag than previous generations," DJI wrote. The Mavic 3 also offers enhanced flight safety thanks to its updated APAS 5.0 system that uses inputs from six fish-eye vision sensor and two wide-angle sensors to detect and avoid obstacles. Meanwhile, the ActiveTrack 5.0 system has new options for tracking subjects no matter which way they're moving, and it can even continue to track a subject if it moves out of frame and pick it back up when it reappears. All of that allows "more fluid and diverse drone and camera movement," DJI said. It also comes with an improved RTH (Return to Home) system that works by automatically calculating the shortest, safest and most energy-efficient route to land back at its home point. It can take into account wind speed and power when calculating the path, giving users a bit more flying time before triggering the RTH action. Another updated feature is O3+ signal loss prevention that allows for a maximum control range of 15 km. Mavic 3 is also DJI's first drone with a 1080p 60fps transmission speed on the live feed, meaning "the camera view is displayed at a resolution close to what the camera actually records," DJI notes. Along with the drone, DJI introduced a number of new accessories, including a new DJI RC Pro smart controller, a 65W Portable Charger that's compatible with notebooks and smartphones and allows for fast charging (around 96 minutes), a wide-angle lens and two sets of ND filters (ND4/8/16/32 and ND64/128/256/512) that allow for shooting in bright sunlight. It also introduced a carrying bag that converts into a backpack that can fit the drone, a laptop and other accessories. Engadget received the drone just yesterday, so we haven't had a chance to fly it yet — stay tuned for a full review. However, I'm impressed so far by the design and small details like the storage cover that protects the camera, gimbals and propeller (below). It's also clear that DJI has put a lot of thought into the new charging system and batteries that should make operation more practical. Even the carrying bag/backpack is well conceived, with pockets and sleeves for the batteries, ND filters and more. source: https://www.engadget.com/dj-is-mavic-3-squeezes-in-a-four-thirds-and-28-x-hybrid-zoom-camera-023041720.html
  19. TSAVI=(s(NIR-s*Red-a))/(a*NIR+Red-a*s+X*(1+s2)) NIR = pixel values from the near-infrared band R = pixel values from the red band s = the soil line slope a = the soil line intercept X = an adjustment factor that is set to minimize soil noise https://pro.arcgis.com/en/pro-app/latest/help/data/imagery/indices-gallery.htm
  20. Hi. I am working on a remote sensing project about land degradation. I want to calculate TSAVI using a Landsat-8 image but I can't find how the a and b (slope and intercept) parameters are calculated. I only know that the variable X=0.08 according to the litterature. Can someone help me?
  21. i think it's a old probably discontinued plugin.. some articles dates of 2012 / 2014.. probably you will have better chances with https://docs.qgis.org/2.8/it/docs/user_manual/processing_algs/otb/index.html
  22. https://www.researchgate.net/publication/286510387_Stereo-Orthoimage_as_a_GIS_Tool_for_Reliable_Restitution_of_Cultural_Monuments/download
  23. I have seen an article about Anaglyph Stereo Viewing and 3D feature extraction using QGIS plugin, this is called OrthoStereoMate (OSM). If someone has used or have please can give any advice, share the installer ? Thanks, Mario
  24. Kleos Space S.A (ASX:KSS, Frankfurt:KS1, Kleos or Company), a space-powered Radio Frequency Reconnaissance data-as-a-service (DaaS) company, has signed new contracts with satellite builder Innovative Solutions in Space B.V. (ISISPACE) and global launch services provider Spaceflight Inc to build and manage the launch its fourth satellite cluster of four satellites, the Observer Mission (KSF3) mid-2022. Kleos Space CEO Andy Bowyer said, “We are rapidly building our constellation, utilising funds from our recent capital raise to commit to our fourth satellite cluster build and launch. Each new launch enables us to improve satellite data collection and increase revisits over key areas of interest for our customers. The Observer Mission increases the revenue opportunity from existing subscribers and caters to the needs of our growing global pipeline. Spaceflight and ISISPACE have proven to be effective partners for both our Vigilance Mission and upcoming Patrol Mission launch. We are leveraging their experience to accelerate the build and launch of our Observer Mission.” Kleos’ fourth satellite cluster complements the 37-degree orbit of the ‘Scouting Mission’ and Sun Synchronous orbits of the ‘Vigilance Mission’ and ‘Patrol Mission’ satellites with up to a further 119 million km2 data collection capacity per day (Vigilance and Patrol Missions each have similar data collect capacity). Netherlands-based ISISPACE will provide Kleos with a turn-key solution for its four Observer Mission satellites, including design, development, production, testing, launch integration services, and support for checkout and commissioning”. ISISPACE has more than 15 years’ nanosatellite experience, successfully built Kleos’ ‘Vigilance Mission’ (KSF1) and is currently building the ‘Patrol Mission’ (KSF2) satellites. Jeroen Rotteveel, CEO of ISISPACE, said, “We are proud to be expanding our strategic partnership with Kleos to build and support the launch of their fourth satellite cluster. Our extensive nanosatellite experience spans design, manufacturing and operation complementing Kleos’ in-house engineering expertise. We look forward to continuing to work with Kleos to increase satellite capability, leveraging learnings from earlier launches.” Spaceflight provided the integration, mission management, and launch services for the successful launch of the Vigilance Mission satellites on its SXRS-5 mission in June 2021 and has already been engaged by Kleos for the upcoming Patrol Mission launch. Marcy Mabry, Spaceflight’s Mission Manager added, “We are delighted to be working with Kleos again to launch its small satellite payload into a 500-600km Sun Synchronous orbit. Our portfolio of frequent launch options provides unmatched flexibility and reliability, ensuring Kleos’ growing constellation gets to orbit when and where they want. Kleos’ satellite technology addresses a real-world need, providing precision geolocation data to improve situational awareness and disrupt illegal activity.” Kleos successfully launched its Scouting Mission and Vigilance Mission satellites in November 2020 and June 2021 respectively. Its Patrol Mission satellites are progressing through the build process and on track for an expected January 2022 launch onboard a SpaceX Falcon 9. Identical to the upcoming Patrol Mission satellites (KSF2), the Observer Mission will provide increased capacity and more frequent revisit times. Each new cluster increases Kleos’ sensing and intelligence gathering capacity, generating potential for higher-value data products and tiered subscription licenses. Kleos’ satellites detect and geolocate radio frequency transmissions to improve the intelligence, surveillance, and Reconnaissance (ISR) capabilities of governments and commercial entities. Its independent geolocation data enhances the detection of illegal activity, including piracy, drug and people smuggling, border security challenges and illegal fishing, and is available to qualified subscribers as-a-service. Final mission costs incurred are anticipated to be comparable with publicly available satellite build and space rideshare costs and within the envelope of the cost of a launch advised within the prospectus. source: Kleos commits to build and launch fourth satellite cluster « Earth Imaging Journal: Remote Sensing, Satellite Images, Satellite Imagery
  25. nice, i feel some improving on performance here thank you admin
  26. upgrade complete, some additional function added, for example the achievement and rank now revamped, enjoy
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