Lmst

Large Drainage Systems Produced Half Of Mars’ Ancient River Sediment
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https://doi.org/10.1073/pnas.2514527122 <-- shared paper
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https://www.thebrighterside.news/post/scientists-discover-16-giant-river-networks-on-ancient-mars-where-life-could-have-thrived/ <-- shared technical media article
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#water ##hydrology #dynamic #planet #Mars #extraterrestrial #ecosystems #drainage #landform
#drainageways #drainagesystems #Martian #terrain #geomorphology #geomorphometry #catchments #fluvia #pluvial #river #sediment #solarsystem #sedimentarybasins #life #habitable #sedimenttransport #topography #erosion #impact #crater #GIS #spatial #mapping #remotesensing #spacecraft #MRO #marsobservation #exploration #martian #MarsAttack

Confoederatio emojica. An icon map of Switzerland.

https://www.thomasweibel.ch/emoji/

#geography #cartography #topography #swisstopo #gis #gps #map #switzerland #emoji #openmoji #opendata

Map of Switzerland consisting of emojis with the location set to the city of Sion.

recent map experiment of Toronto's terrain

made via QGIS/Inkscape/GIMP and TIN data from Toronto Open Data

higher-res here: https://jamaps.github.io/maps/terrain-toronto_2880x1620.png

#toronto #maps #terrain #topography #qgis #inkscape #gimp

Map of the City of Toronto shaded on two gradients A) from light blue-ish green to light red based on elevation and B) from light to dark showing slope of the land. The map highlights overall elevation patterns in the City, as well as highlights big river valleys and escarpments

For Decades, Cartographers Have Been Hiding Covert Illustrations Inside of Switzerland’s Official Maps.

https://eyeondesign.aiga.org/for-decades-cartographers-have-been-hiding-covert-illustrations-inside-of-switzerlands-official-maps/

"As Juerg Gilgen, a current cartographer at Swisstopo, told me “as a matter of fact, the proof-reader is also just a human being prone to failure. And cartographers are also just human beings trying to fool around.”"

Wonderful, wonderful stuff.

#MapMaking #maps #cartography #switzerland #Swisstopo #topography #hidden #illustration #eyeondesign

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A marmot hiding in plain sight in the Swiss Alps.

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

Contours of Memory

#SwissPhotography #MuseumPhotography #FineArtPhotography #Monochrome #Topography

Places and their names for today's #30DayMapChallenge or Topography and Toponymy.

I used the #Greenland #Glacier Names dataset^[1] and BedMachine Greenland v5^[2] to show off some of the fantastic glacier names in West Greenland (Kalaallit Nunaat).

Somewhat confusingly, mostly because I wasn't thinking (it's late, y'know) I apparently decided to show the terrain sans-ice.

Made in #QGIS. Typeface: League Spartan by the League of Moveable Type

[1] Getting Greenland's glaciers right by Bjørk, A. A., Kruse, L. M., and Michaelsen, P. B. (2015) https://doi.org/10.5194/tc-9-2215-2015

[2] Morlighem, M. et al. (2022) https://doi.org/10.5067/GMEVBWFLWA7X

#topography #toponymy #maps #KangilliupSermia #NunaarsussuupOqquatungaaniSermikassak #gis #glaciology

A map showing the bathymetry and sub-glacial topography across West Greenland. The topography is on a black to dark blue to light blue color ramp. Contours are drawn and 250 m intervals. There are many fjords and islands. Several fjords have regions where the depth is 1000+ m. There is a subtle hill-shade layer on top of the terrain. There are ~30 glaciers marked as small orange crosses, with their names written along side. The names are in Greenlandic, for example: Nunaarsussuup Oqquatungaani Sermikassak, Tassartooq, Sermikassak, Umiammakku Sermiat, Nakkala, and Kangilleq. The map is titled: 'Glaciers of West Kalaallit Nunaat (Greenland)' with the following text below: 'Changes to the Greenlandic language coupled with a history of exploration has led to many glaciers having multiple names. Greenlandic names are typically descriptive, whereas names given during expeditions are often say more about those on the expedition. For example, Rink Isbræ was named in honour of Hinrich Johannes Rink (Isbræ meaning glacier in Danish). Its Greenlandic name: Kangilliup Sermia, can be approximately translated to mean: The Eastern Ice.' In the bottom left the data sources are credited: 'Greenlandic Glacier Names by Bjørk, Anders; Kruse, Lisathe; Michaelsen, Peter (2015). https://doi.org/10.6084/m9.figshare.1449148.v2 & BedMachine Greenland by Morlighem, M. et al. (2022). https://doi.org/10.5067/GMEVBWFLWA7X. Date Accessed 24-11-2025.' & in the bottom right it reads : 'by:tlohde'

Hype for the Future 20C: Decoding Geographic Names

New England Within the New England region is Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut. Northern New England is Maine, New Hampshire, and Vermont, while Southern New England is Massachusetts, Rhode Island, and Connecticut. “The County” in Maine may refer to Aroostook County, and the portions of New England closest to the Québec border are often associated with an enhanced sense of rurality. Further away from the international border is Mount Katahdin, […]

https://novatopflex.wordpress.com/2025/11/20/hype-for-the-future-20c-decoding-geographic-names/

Remolding Scotland by depicting river catchments as terrain for today's #30DayMapChallenge : #water

Catchments are from Cefas, via SEPA.

Made a proximity surface* for distance to catchment boundary, then applied a hillshade to that.

*again, like a one-trick pony.

Font: League Script by The League of Moveable Type

as usual made with Python: #matplotlib, #xarray #scipy #shapely #geopandas

#rivers #scotland #topography

Map titled: "River Catchments of Scotland". Distance from catchment boundary is shown as hillshaded topography and coloured using a blue-to-white colourmap. Large catchments, such as the Tweed in the Scottish Borders, Tay in Perth and Kinross, and the Spey all appear as large depressions in the landscape with their catchment boundaries appearing as ridges. The sea is depicted with a random scattering of blue-to-white dots. Credits in the bottom left corner read: "by:tlohde / OpenStreetMap contributors / includes Crown copyright, Cefas 2023 / League Script by the League of Moveable Type"

Draining Topography is Hard

At first glance, draining an ocean seems simple like a simple problem: just put a drain at the lowest point. But, as shown in this Minute Physics video, the problem is harder than it sounds because drainage depends not just on a point’s elevation but also on the path that leads to the drain. Fortunately, Henry has some clever methods for figuring out which areas would drain and how. (Video and image credit: Minute Physics)

#drainage #fluidDynamics #oceans #physics #science #topography

The 3D Elevation Program—Supporting The Economy Of Massachusetts [USGS]
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https://pubs.usgs.gov/publication/fs20253044 <-- shared USGS fact sheet
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#GIS #spatial #mapping #3DEP #opendata #LiDAR #elevation #DEM #Massachusetts #USA #costbenefit #returnoninvestment #topography #usecase #cost #economics #risk #hazard #infrastructure #USGS
@USGS

🏔️ How high is your community?

Using the MRDEM-2024 elevation model, I mapped the average elevation for each Calgary community.
The result clearly shows how the city “steps down” from the western uplands toward the Bow and Elbow River valleys in the east and south.

🔹 The highest areas — around Tuscany, Rocky Ridge, and Cougar Ridge — rise over 1,240 m above sea level.
🔹 The lowest zones — Shepard, McKenzie Towne, and parts of the southeast — drop to about 1,000 m.

It’s a great reminder that Calgary’s landscape still reflects its glacial past — a city built on terraces, slopes, and ancient river plains.

#Calgary #Alberta #Geography #Geospatial #QGIS #OpenData #UrbanGeography #DataVisualization #Topography #Geomorphology #Canada #DEM

Digital Elevation Model (MRDEM-2024) over Calgary with community boundaries.
Warm colors (red-orange) show higher elevations in the west; cool colors (blue-green) show lower areas near the Bow and Elbow rivers.

Map of Calgary communities colored by weighted average elevation.
The northwest and western districts (Tuscany, Rocky Ridge) are the highest; the southeast communities (Shepard, McKenzie Towne) are the lowest.

Halle Riebeckplatz 10/25
#photography #blackandwhite #rawtherapee #olympus #halle #riebeckplatz #topography

https://journeyjunctionart.com/virginia-unknown--elevations-topography-map I found this delightful. #art #gis #virginia #JoyDivision #topography

Sestiere – sestieri

Venice is divided into six parts called sestieri - singular sestiere.

It has always been that way. From the earliest sources we have, there sestieri are there in Venice.

#Franks #HowVeniceWorks #SestieriDiVenezia #Topography #VenetianState #Venezia #Venice

🔗 #Topography & grazing exclusion ➡️ vegetation and soil in typical steppe on the Loess Plateau

Results:
1️⃣ Soil moisture peaked at 3 years of exclusion.
2️⃣ Aspect and slope positively affected the relationship between soil properties and aboveground biomass significantly.
3️⃣ Livestock exclusion of sunny slope is more beneficial to soil nutrient accumulation than shady slope.

#TypicalSteppe | #DurationOfLivestockExclusion | #SoilProperties | #VegetationCharacteristics

https://doi.org/10.1093/jpe/rtaf081