Lmst

Light Detection And Ranging Of Natural Systems
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https://doi.org/10.1038/s43586-025-00446-3 <-- shared paper
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['primer'/'tutorial'/overview]
#GIS #spatial #mapping #remotesensing #explanation #tutorial #overview #primer #LiDAR #laserscanning #survey #pointcloud #spatialanalysis #airborne #satellite #usecase #vegetation #forest #forestry #resource #wildfire #fuel #elevation #topography #bathymetry #glaciology #glacier #workflow #naturalsystems #applications #algorithms #sensors #geomorphometry #geomorphology #drone #UAV #water #hydrology #groundbased #instrumentation #spatiotemporal #landsurface #landcover

#30DayMapChallenge Day 28: Black

On this Black Friday, I found today’s theme in the depths of the Black Sea 🌊.

Using the OpenTopography DEM Downloader, I grabbed the Global Bathymetry SRTM15+ V2.1 dataset, calculated 100 m contours, and applied the Tanaka method with a style from the QGIS Hub plugin. 🎨

#QGIS #Cartography #OpenData #Bathymetry #BlackSea #GIS #Mapping

@enigma Solch Streifen hier in google maps sind übrigens nicht "echt". Das sind Artefakte der Schifffahrtsrouten. Da misst man eben genauer_
https://www.google.com/maps/place/Los+Santos+Province,+Panama/@5.7165931,-86.094954,331407m/data=!3m1!1e3!4m6!3m5!1s0x8fad8f544ae54379:0x2a58179fa0ed53fd!8m2!3d7.5909302!4d-80.365865!16zL20vMDJzc2Zx?entry=ttu&g_ep=EgoyMDI1MTEyMy4xIKXMDSoASAFQAw%3D%3D

#Bathymetry

@enigma Und dieser Globus ohne Wasser ist auch sehr besonders. Etwas grob, aber faszinierend.

https://mprove.de/chrono?ll=0.93887,157.86938&q=0.93887,164.87129&z=3.04&t=21&c=lbathy,m

#bathymetry

@enigma Zauberhaft!

/BTW #Bathymetry im Chronoscope >> https://mprove.de/chrono?ll=2.18031,-21.87805&q=-62.75472,-56.76191&z=1.19&d=0&c=lbathy,m,k

Day 20 of #30DayMapChallenge: Water 🌊
Here’s the Mediterranean Sea in stunning detail using the ETOPO1 global relief model — deep trenches, shallow shelves, and surrounding terrain all in one map.

R + terra + ggplot2 💙

#RStats #GIS #Bathymetry #Mediterranean #DataViz #Geospatial

#30DayMapChallenge Day 20: Water
Arrieta. #Sopela. Learning #bathymetry. After calculating the #Stumpf ratio using #Sentinel2 images, we compared it with the bathymetry layers (1 & 5 m) available at #GeoEuskadi.
A lot to process, a lot more to learn
#rstats #RemoteSensing #GIS #EarthObservation

A detailed bathymetry model of Lake Victoria 🗺️🌊
Dataset source: Harvard Dataverse (Remastered Version)

Exploring the depths of Africa’s largest lake across 🇹🇿 🇰🇪 🇺🇬

#Victoria #LakeVictoria #Tanzania #Kenya #Uganda #EastAfrica #Africa #GIS #Geospatial #Cartography #DataVisualization #Dataviz #Bathymetry #b3d #Map

In 3 days, @esri webinar: Explore #ArcGIS #Bathymetry for Offshore #Energy https://tinyurl.com/587wf7z2

#seafloor #3D #spatial #analysis #imagery #GIS #esri #mapping #GISchat #geospatial @esrifederalgovt @arcgispro @esritraining @urisa

Intense Groundwater Flow Destabilizes Ice In North America's Great Lakes, Simulations Show
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https://phys.org/news/2025-09-intense-groundwater-destabilizes-ice-north.html <-- shared technical article
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https://doi.org/10.1029/2025WR040581 <-- shared paper
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"KEY POINTS:
• Groundwater inflow enhances winter lake ice thickness by stabilizing the water column and reducing vertical mixing
• Ice responses to groundwater are strongest in coastal zones due to higher flux and shallow bathymetry
• Including groundwater in coupled models improves understanding of ice formation and winter lake processes…”
#water #hydrology #groundwater #flux #flow #GreatLakes #USA #LakeMichigan #LakeHuron #ice #climatechange #model #modeling #shoreline #coast #lakeice #melt #hydrodynamic #spatialanalysis #spatiotemporal #thermal #stratification #winter #bathymetry #coupledmodels #processes

Still on my #Bathymetry bullshit. In my ocean currents #Blender scene I'm using #Nasa bathymetry data and #GeometryNodes to drive the elevation of the earth model. Because the earth is essentially a very smooth sphere I have to greatly exaggerate the depth, with a non-linear gradient between the underwater regions and the coastal shelf. I was doing it with a Float Curve node, but I wanted to be able to easily tweak the parameters of where the points on the curve were.
Annoyingly there's no access to the points in a float curve, as node inputs or even with a #python data path that I could script. So I rigged up this node group to mimic the action of the float curve. I use a couple of Map Range nodes for each part of the line and switch between their output. It works well for a linear curve, I'm going to have to investigate whether the smooth interpolation in the Map Range node will let me achieve the same results as a float curve, and maybe automate it a bit.
#b3d #ScientificIllustration

Blender node graph showing a float curve being replaced by a couple of map ranges, a compare and a switch node.

"Low poly" style (actually fairly high poly) 3D model of the earth with the elevation of the land greatly exagerated, and ocean currents illustrated

Combining physical and artificial intelligence models to improve satellite-derived bathymetric (SDB) mapping in shallow areas compared to conventional methods #bathymetry

https://www.sciencedirect.com/science/article/pii/S1574954125003371

Mid-June we spent 2 days on a #Fieldtrip to the #Maade #River in #Wilhelmshaven as part of our #METAscales project
Day 1: Installed two new #SEBA gauges to track water level & conductivity—crucial in our sluice-and-pumping-station-drained catchment. 🔧 🌊 🛠️
Day 2: Gained hands-on experience with our boats & ADCP for bathymetry surveys. 🚤💧🔍
Learn more about METAscales https://lnk.tu-bs.de/MBdwv8
#BMBF #Equipment #Drainage #Bathymetry”

The seafloor around the remote British Overseas Territory of #AscensionIsland just got mapped, some of it for the first time ever...Looking at this cheerful looking crew in shorts , I wonder what it would be like to be one of the Ascension Island Government Conservation Team. https://gogeomatics.ca/seeing-what-lies-beneath-seafloor-mapping-in-a-marine-protected-area/ #bathymetry #marineReserve

European Geological Open Data (Map And Data) From The European Geological Data Infrastructure (EGDI)
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https://www.europe-geology.eu/data-tools/map-viewer/ <-- shared link to map viewer
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#geology #geosciences #earthsciences #data #spatialdata #criticalminerals #mining #geothermal #netzero #groundwater #carboncapture #ccs #GIS #spatial #mapping #opendata #webmapping #mapportal #Europe #EGDI #framework #GSEU #resources #naturalresources #opendata #water #naturalresources #geomorphology #bathymetry #geophysics #topobathy #remotesensing #earthobservation #waterresources

Surfing bathymetry refers to the underwater topography that shapes how waves break, including reefs, sandbars, and underwater canyons. The ideal bathymetry funnels wave energy toward shallow areas in a way that creates clean, rideable waves.

Thanks for sharing, Olivia S.!

#science #sciencefacts #bathymetry #surfing #surfingbathymetry

Coastal Environments - LiDAR Mapping of Copper Tailings Impacts, Particle Retention of Copper, Leaching, and Toxicity
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https://doi.org/10.3390/rs17050922 <-- shared paper
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#GIS #spatial #mapping #remotesensing #earthobservation #coastalenvironment #coast #coastal #mine #tailings #minetailings #GlobalTailingsManagementStandard #Keweenaw #LiDAR #bathymetry #topobathy #UAS #drone #particledispersal #copper #retention #leaching #BuffaloReef #toxicity #Daphnia #benthic #organisms #risk #hazard #contamination #impacts #sediment #water #hydrology #Michigan #USA #LakeSuperior #PortageLakeVolcanic #geology #spatialanalysis #biology #ecosystems #fisheries #trout #enviornmentalimpacts #leaching #riparian #systems

maps - Geographic location of Grand (Big) Traverse Bay (red to green contours) along the eastern shoreline of the Keweenaw Peninsula. On the Peninsula, early copper mines are indicated by black dots within the Portage Lake Volcanic Series (dashed lines) and large stamp mills by stars. Two mills (Wolverine and Mohawk) are located near Gay. Insert shows anthropogenic copper inventory “halo” around the Peninsula, in µg/cm² copper

maps - Grand (Big) Traverse Bay: 2010 LiDAR DEM (digital elevation model) colour-coded by elevation and water depth (depth scale to right). Red horizontal contour lines are at 5 m depth intervals. Gay tailings pile (“original pile”) is indicated, as well as migrating underwater stamp sand bars dropping into an ancient river channel (the Trough; at locations #1, and #5). On the eastern flanks of Buffalo Reef, stamp sands are moving out of the Trough into cobble/boulder fields (#3, #4). Along the western edges, stamp sands have migrated as a beach deposit to the Traverse River Seawall (#8) and are slipping down into an underwater depression (#7) next to cobble/boulder fields. Stamp sands are also moving around the harbour outlet (#8). Hence, both the eastern and western sides of Buffalo Reef are experiencing tailings encroachment. Lower on the reef (#2, #6), there is little contamination. Past the Traverse River, the sands in the southern bay are almost exclusively natural quartz grains (#9), forming a white beach with shoreline cusp-like features and bar, plus ridges (#10) of natural sand moving from the shelf into deeper waters off the bay and into Lake Superior

aerial images - UAS high-resolution drone elevation and bathymetry surveys (base map 9 August 2022) of shoreline retreat at the original Gay pile location after bluff removal. Overlays along the beach edge trace shorelines in 2009, 2016, and 2022. The 78 m retreat over 6 years (2016–2022); equates to a 13 m/yr rate. The previous, nearly constant, long-term retreat rate prior to 2009 averaged 7.9 m/yr (ca. 26′) [7,57]. The original Jacobsville Sandstone shoreline, before stamp sands were discharged, is marked by the red border in the far-left upper region. Note white concrete basements of the two mills and remnants of both wooden and broken concrete launders in the northern region. Environmental recovery is beginning, as benthic organisms and fish are returning to clear underwater stretches of the bedrock shelf, where waves have removed stamp sands. Scattered trees (many birch) are beginning to colonise what is left of the original Gay Pile surface.

photos - Gay Stamp Sand Pile. (a) Wooden discharge launder distributing tailings onto the Gay Pile, around 1922, with smaller sluices conveying stamp sand and slime clays laterally (courtesy MTU Archives). (b) Photo of 6–8 m high stamp sand bluffs in July 2008 off Gay, showing a buried small lateral sluiceway protruding out of the pile along the shoreline. Lake Superior waters are to the right; the dark beach sands are stamp sands with intermixed slime clay layers. (c) Bluff photo from about the same location in 2019, when shoreline erosion (ca. 7–8 m/year) reached the buried launder support beams, just before bluff removal.

New Map Of Landscape Beneath Antarctica Unveiled
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https://phys.org/news/2025-03-landscape-beneath-antarctica-unveiled.html <-- shared technical article
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https://doi.org/10.1038/s41597-025-04672-y <-- shared paper
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#GIS #spatial #mapping #Bedmap3 #icebed #surface #thickness #gridded #datasets #Antarctica #raster #model #modeling #landscape #elevation #icesheet #survey #remotesensing #earthobservation #climatechange #warming #climate #melt #melting #seafloor #subglacial #geophysical #survey #topography #geology #bathymetry #topobathy #BritishAntarcticSurvey
@BritishAntarcticSurvey

schematic / flow chart - Schematic showing the Bedmp3 source datasets (white boxes) combining to make intermediate products (blue boxes) and ultimately the final set of grids (orange boxes) and their uncertainties (yellow boxes). Note that the surface grid has a uniform estimated uncertainty (Section Uncertainty estimates).

maps - Bedmap3 grids of (a) bed topography and (b) surface elevation, in metres above sea level (g104c geoid), and (c) ice thickness in metres. Locations labelled in (b) are referred to in the text

The BedMachine v3 bed has some subjective advantages over Bedmap3 where glacier flow is relatively fast, but survey data are sparse. (a) Surface flow speed43; (b) BedMachine v3 bed topography; (c) Bedmap3 bed topography, both overlaid on shaded relief and with survey data shown as grey lines. The black dotted line highlights a trough under slow-flowing ice that is more smoothly continuous in Bedmap3. The white oval highlights the trough of a relatively fast-flowing ice stream that in BedMachine v3 is more smoothly streamlined and subjectively more realistic than in Bedmap3, given the typical streamlined form of deglaciated ice stream landscapes. An objective test of bed accuracy in this area requires more survey data.

maps - The Bedmap3 survey dataset allows us to calibrate the more continuous and extensive freeboard-based ice shelf thickness grid. (a) Pointwise ice thickness biases between 119,000 survey measurements and the freeboard-derived ice thickness grid47 on the Ross Ice Shelf, showing coherent patterns of bias; (b) these pointwise offsets median-filtered over a 20 km radius; (c) spline-interpolated calibration grid of the filtered offsets in (b); (d) bias-corrected version of the freeboard-derived ice thickness grid after subtraction of the calibration grid in (c).

Seismometers Reveal Earth's Longest-Runout Undersea Sediment Flows In Unprecedented Detail
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https://phys.org/news/2025-02-seismometers-reveal-earth-longest-runout.html <-- shared technical article
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https://doi.org/10.1038/s43247-025-02137-z <-- shared paper
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https://doi.org/10.1016/j.geomorph.2024.109350 <-- shared paper
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https://doi.org/10.1038/s41561-022-01017-x <-- shared paper
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#GIS #spatial #mapping #remotesensing #Congo #CongoChannel #bathymetry #seismometers #monitoring #sediment #flow #submarine #massmovement #canyon #infrastructure #pipes #cables #engineeringgeology #geology #model #current #debrisflow #bathymetric #Africa #offshore #coast #coastal #river #WestAfrica #instrumentation #acoustic #doppler #moorings #turbidity #thalweg #morphology #landslides #stratigraphy #seismic #turbiditycurrent #flow #gradient #slope #erosion #risk #hazard #spatialanalysis #spatiotemporal #seabed

cross section / schematic - Surge dynamics of canyon-flushing turbidity currents

Difference maps showing seabed changes (in metres) in the upper Congo Canyon between 2019 and 2020... The grey shaded base map shows seabed gradients in 2020. Shades of red correspond to areas of erosion, and blue to areas of deposition.

Bathymetric map of the Congo Canyon-Channel system and instrument placement

schematics - Schematic summary of the categories for types of seabed erosion observed in the Congo Canyon-channel between 2019 and 2020, and their relative volumetric importance

Data Request For Potomac River Tragedy - National Centers For Environmental Information (NCEI), NOAA In The News
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https://www.ncei.noaa.gov/ <-- shared NCEI home page
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“A CNN Reporter requested data to portray the depth of the Potomac River near the site of the tragic plane and helicopter crash. The Digital Elevation Model Bathymetry (DEM) Team responded with information on how to use NCEI’s high-resolution Continuously Updated Digital Elevation Models (CUDEMs) to generate a map of the Potomac River and provided an example map…”
#GIS #spatial #mapping #remotesensing #bathymetry #topobathy #DEM #elevation #depth #NCEI #opendata #CUDEM #disaster #collision #air #potomacriver #potomac #crash #airdisaster #Washington #helicopter #ArmyHelicopter #blackhawk #NOAA #aviation #midair
@NOAA @NCEI

#bathymetry

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