#geodesy — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #geodesy, aggregated by home.social.
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Asian Association on Remote Sensing (Remote sensing 🛰️)
Asian Association on Remote Sensing is a non-governmental organization established in 1981 to promote remote sensing in the Asia-Pacific region; it currently has members from 29 countries.
https://en.wikipedia.org/wiki/Asian_Association_on_Remote_Sensing
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The Geoid
#Geodesy #Geodetics #Geodetics/Gravity
⏩ 1 new picture and 1 new video from NASA (SVS) https://commons.wikimedia.org/w/index.php?search=incategory%3A%22NASA+SVS+files+uploaded+by+OptimusPrimeBot%22&sort=create_timestamp_desc&ns6=1
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@ai6yr
I imagine the satellite imagery will still update in the stand-alone app.
And anyone will still be able to use placemark downloads.
Ancient Monument Placemarks
https://www.jqjacobs.net/kml/
#KML #Geodesy #Archaeology -
1918 Geographic Center Of The [contiguous] Lower 48 States [CONUS] - Lebanon, Kansas
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https://clui.org/ludb/site/geographic-center-lower-48-united-states <-- shared technical article
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https://www.ngs.noaa.gov/PUBS_LIB/GeoCenter_USA1.pdf <-- shared 1959 NOAA technical article
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https://www.smithsonianmag.com/smart-news/many-centers-united-states-180955253/ <-- shared 2015 technical article
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https://www.atlasobscura.com/articles/journey-to-the-center-of-the-united-states <-- shared technical media article
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In 1918, the US Coast and Geodetic Survey attempted to find the center of what was then the United States’ (lower) 48 states. Because they lacked the computing power to process the complex geometry of an irregular, 3D landmass, they placed a carefully scaled map of the 48 conterminous states onto a uniform piece of cardboard. After cutting it out, they determined the geographic center by finding the exact point at which the map balanced perfectly on a pin.
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#spatial #mapping #USA #Lower48th #center #centre #Lebanon #Kansas #geodetic #geodesy #geography #spatialanalysis #cartography #PinAndCardboard #history #tourism #americana
@NOAA | @USGS | @us Coast and Geodetic Survey -
Coastal regions face severe, accelerated risks from relative sea-level rise, a phenomenon driven by the dual impact of climate-driven ocean expansion and localized land sinking (subsidence).
#Geodesy #Geodynamics #Hydrology #AtmosphericScience #sflorg
https://www.sflorg.com/2026/05/es05182601.html -
Most GNSS survey failures aren’t equipment—they’re poor site selection.
I’m experimenting with using low-cost GNSS receivers (L76K vs u-blox MAX-M10S) to pre-qualify sites before running NOAA OPUS.
~30–90 min logs → PostgreSQL → HDOP, CN0, wander analysis.
Early results show tradeoffs between signal strength and positional stability.
https://salemdata.net/johnpress/?p=628
Anyone exploring similar GNSS site validation?
#GNSS #GPS #Geodesy #ESP32 #PostgreSQL #OpenSource #DataEngineering #Meshtastic -
Laser Ranging Makes GPS Satellites More Accurate
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The oceanic tidal pulse extends significantly deeper into terrestrial waterways than previously recognized, serving as a highly dynamic force that continuously alters the physical and biological landscapes of coastal rivers.
#Hydrology #Oceanography #Geodesy #EnvironmentalScience #Ecology #ClimateChange #sflorg
https://www.sflorg.com/2026/03/es03182601.html -
@konrad @internetarchive oh wow, this looks amazing! I need to figure out how to get in place something like this for my measuring.earh/minutes project
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#NASA satellite data tracking Earth's #gravity changes cannot be used to predict oncoming #earthquakes, debunking previous hypotheses about early warning capabilities.
#EarthScience #Seismology #Geodesy #sflorg
https://www.sflorg.com/2026/02/es02182601.html -
If I had a dollar every time someone said the haversine formula was "good enough", I could probably have a mediocre meal out. Vincenty all the time.
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RE: https://spore.social/@minouette/114036206774374378
Gladys West died January 17 at age 95, leaving behind an extraordinary legacy in mathematics and geodesy.
My portrait and bio are below.
#womenInSTEM #BlackInSTEM #mathematics #satellites #geodesy #EarthScience
Obituary:
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you could use an oblique Mercator projection, but that only makes one side of the northern hemisphere larger
https://en.wikipedia.org/wiki/File:Mercator_Polar_Transverse.gif
#mapprojection #geodesy -
https://en.wikipedia.org/wiki/Gladys_West
"Before GPS became an everyday utility, it was a hard mathematical problem.
In 1950s–70s, Gladys West - mathematician @ U.S. Naval Surface Warfare Center in Dahlgren, VA - worked on one of the most difficult challenges in satellite navigation: accurately modeling the Earth itself.
Modern GPS accuracy depends on:
• Precise satellite ephemerides
• Accurate gravitational field modeling
• Correct Earth reference frames
West’s work directly advanced all three
Her contributions weren’t widely recognized; it wasn’t until 2018 that she was inducted into the USAF Space and Missile Pioneers Hall of Fame - decades after GPS reshaped global navigation, logistics, finance, defense & mobile computing...
Before GPS could tell us where we are, someone had to define what the Earth actually looks like mathematically…”
#Engineering #GPS #Geodesy #STEM #TechHistory #WomenInTech #DataScience #Infrastructure #WomenInGeoSpatial
H/T Evan Kirstel [despite their puerile AI-generated image of Ms. West] -
Spherical Earth (Cartography 🗺️)
Spherical Earth or Earth's curvature refers to the approximation of the figure of the Earth as a sphere. The earliest documented mention of the concept dates from around the 5th century BC, when it appears in the writings of Greek philosophers. In the 3rd century BC, Hellenistic astronomy established the roughly spherical shape of Earth as a...
https://en.wikipedia.org/wiki/Spherical_Earth
#SphericalEarth #Earth #Geodesy #Spheres #Cartography #AncientAstronomy
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Earth orientation parameters (Earth 🌍)
In geodesy and astrometry, earth orientation parameters describe irregularities in the rotation of planet Earth. EOP provide the rotational transform from the International Terrestrial Reference System to the International Celestial Reference System, or vice versa, as a function of time. Earth's rotational velocity is not constant over time.
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📣 New selected research highlight 🚀
🔍 Precision optics for global climate change monitoring 📉
The design, testing, and in‑orbit performance analysis of the GRACE Follow-On triple mirror assembly
ℹ️ https://www.aei.mpg.de/1337691/precision-optics-for-global-climate-change-monitoring
📄 https://journals.aps.org/prapplied/abstract/10.1103/7ps8-317c [Open Access]
Image: Fig. 2 from the publication
#GRACEFO #ClimateChange #GlobalWarming #Physics #Geodesy #Optics
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Earth orientation parameters (Earth 🌍)
In geodesy and astrometry, earth orientation parameters describe irregularities in the rotation of planet Earth. EOP provide the rotational transform from the International Terrestrial Reference System to the International Celestial Reference System, or vice versa, as a function of time. Earth's rotational velocity is not constant over time.
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What a year it's been!🎉 Feeling immense gratitude and pride as I look back at some of my latest architectural elevation drawings. Each line, every detail, crafted with passion and precision.
Ready to jump into new challenges and projects! #Architecture #Elevations #Portfolio #2Ddrawing #CADdrafting #geodesy #pointcloud #laserscanning #survey
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Researchers measured the Earth's axis wobble with a high-precision #RingLaser in Wettzell, Bavaria. The method provides direct and continuous data, previously only possible with complex radio astronomy: http://go.tum.de/178205
#geodesy #geophysics #gyroscope
📷A.Eckert
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Join the 12th edition of the Geodesy #Campfire with two invited speakers, Amin Shakya and Vivek Yadav Kumar, who will give a talk about #Geodesy and #Hydrology!
📆 Thursday 11 September from 10:00 a.m. to 11:30 a.m. (CEST).
🔗 Registration link : https://egu.eu/6XGI40/
👉 Learn more here: https://egu.eu/322QG1/
