Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
ohai.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
A cozy, fast and secure Mastodon server where everyone is welcome. Run by the folks at ohai.is.

Administered by:

Server stats:

1.8K
active users

ohai.social: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.4.0-nightly.2025-04-15

#sentinel

2 posts1 participant0 posts today
Public *
Spatialists

#Drought, Lake #Constance and #Sentinel-2: Switzerland has experienced an exceptionally dry period, with Lake Constance’s water levels dropping to their lowest in decades due to little rainfall and snowmelt from the Alps. Recent Sentinel-2 #earthobservation / #remotesensing data and gauging station records reveal...
spatialists.ch/posts/2025/04-0 #GIS #GISchat #geospatial #SwissGIS

spatialists.ch – geospatial newsDrought, Lake Constance and Sentinel-2 – spatialists.ch – geospatial news
More from Spatialists
Public
💧🌏 Greg Cocks

Data In Action: The 2022 Hunga-Tonga Hunga-Ha′Apai Eruption - Altimetry Data And Models Help Us Understand How A Volcanic Eruption Generated A Tsunami
--
podaac.jpl.nasa.gov/DataAction <-- shared technical article
--
doi.org/10.1038/s43247-024-016 <-- shared paper
--
podaac.jpl.nasa.gov/dataset/JA <-- shared NASA dataset - Sentinel-6A MF Jason-CS L2 P4 Altimeter Low Resolution (LR) NTC Reduced Ocean Surface Topography F08
--
#GIS #spatial #mapping #earthobservation #remotesensing #fedscience #tonga #HungaTonga #HungaHaApai #eruption #volcanic #volcano #Pacific #marine #geology #engineeringgeology #risk #hazard #satellite #altimetry #data #model #model #spatialanalysis #Tsunami #risk #hazard #monitoring #coast #coastal #naturalhazard #Sentinel #sealevel #warning #earlywarning
@nasa

Public
💧🌏 Greg Cocks

Glacial Lake Mapping Using Remote Sensing Geo-Foundation Model
--
doi.org/10.1016/j.jag.2025.104 <-- shared paper
--
HIGHLIGHTS:
• Proposed U-ViT model based on Prithvi GFM for multi-sensor glacial lake mapping.
• Achieved an F1 score of 0.894 on Sentinel-1&2, surpassing CNNs scoring below 0.8.
• Maintains strong performance with 50% less training data, proving efficiency.
• Excels in detecting small lakes (<0.01km²) and handling clouds and complex terrains..."
#GIS #spatial #mapping #glaciallake #GeospatialFoundationModel #satellite #Sentinel #GaoFen #remotesensing #earthobservation #model #modeling #climatechange #glacial #glacier #melt #melting #UViT #deepleanring #AI #framework #performance #metrics #opensource

phot - glacier with glacial lake, Karakoram mountain range
Public
💧🌏 Greg Cocks

A Methodology For The Multitemporal Analysis Of Land Cover Changes And Urban Expansion Using Synthetic Aperture Radar (SAR) Imagery - A Case Study Of The Aburrá Valley In Colombia
--
doi.org/10.3390/rs17030554 <-- shared paper
--
#GIS #spatial #mapping #SyntheticApertureRadar #SAR #remotesensing #multitemporalanalysis #landcover #landcoverchange #clustering #kurtosis #fuzzylogic #kernelbasedmethod #machinelearning #spatialanalysis #spatiotemporal #geostatistics #model #modeling #AburráValley #Columbia #urban #urbanexpansion #population #growth #topography #monitoring #satellite #sentinel #valley #landuse #distribution #infrastructure #building #roads #naturalresources #environmental #conservation #monitoring #multitemporal

photo - looking down into Medellin, Aburrá Valley, Columbia from a surrounding high ground
annotated maps with imagery - Areas of analysis of the results by the SMA1 methodological route and kurtosis. (A). Central Park in Bello (B). Parques del Río Medellín (C). Arkadia Shopping center; (D). Peldar Plant (E). La García water supply reservoir (F). Conasfaltos dam (G). La Ayurá stream basin in Envigado (H). Central Park in Bello (I). Avenida Regional Norte (J). Vía Distribuidora Sur.
schematic / work flow - proposed methodology for analysis of zonal land cover changes
annonated maps - The Aburrá Valley (white line) between the valleys of the Magdalena and Cauca rivers. Data were acquired from ALOS PALSAR Terrain Corrected and data from IGAC.
ExploreLive feeds
About