David Oesch
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davidoesch.bsky.social
David Oesch
@davidoesch.bsky.social
160 followers 310 following 13 posts
Geo & Data evangelist. Project Manager by conviction. General knowledge master.
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Reposted by David Oesch
stim3on.bsky.social
Taking a closer look at the Peak of Kleines Nebelhorn and the collapsed Birchgletscher, the areas of elevation loss become quite evident, with a loss of up to 128 m for the mountain, and 51 m for the glacier.
Some areas show accumulated loose debris which likely poses a risk for further rock slides.
Closer map view showing the top of Kleines Nebelhorn and the Birchgletscher showing a signifcant loss of material at the Northern side of the peak and over the glacier area. The side flanks of the glacier have not collapsed yet, with locally up to 36m of loose material. A small collapse is also evident on the Southern side of the Mountain.
June 1, 2025 at 10:10 AM
Reposted by David Oesch
stim3on.bsky.social
I also derived a new elevation model from the aerial images, allowing me to visualize the elevation change in the affected areas.
The rocks and debris in the valley are locally up to 32m thick and I estimate the total displaced volume is about 11 million cubic meters. #Blatten
Map of the Lötschtal showing the area affected by the glacier collapse. Blue colors show lost elevation, red areas elevation gains. The two most notable areas are the collapsed peak of Kleines Nesthorn and the collapsed glacier which are shown in deep blue with elevation loss of up to 128m and 51m respectively. The material slid down the mountain in an approximately 400m wide path and accumulated in a 2,5km long area on the valley floor which is up to 32m thick. The newly formed lake above the village of Blatten is also drawn in. The Map text reads: Kleines Nesthorn and Birchgletscher collapse / Blatten im Lötschental (VS) On Wednesday, May 28th, a2025, the Birchgletscher glacier collapsed under the weight of rock and debris following the partial collapse of the Kleines Nesthorn. Approximately 10 million cubic meters of debris flowed into the valley, burying large parts of the villages of Blatten and Ried. The debris also blocked the Lonza River, forming a small lake that destroyed several more houses in Blatten. Analyis Using Oblique imagery collected and provided by swisstopo on May 30th, 2025, a photogrammetric DEM was created and compared to the swissALTI3D DEM. The following volume change was measured in the affected area: Above Volume (m³): 11.2 Mio Below Volume (m³): 10.1 Mio
June 1, 2025 at 9:39 AM
davidoesch.bsky.social
Writing geoparquet —- a one liner with geopandas github.com/swisstopo/to... reading a few lines github.com/swisstopo/to...
topo-satromo/main_functions/main_extract_warnregions.py at 1d8f14fa1179bd05b438ef2836aec567f302a46f · swisstopo/topo-satromo
Erdbeobachtungs-Satellitendaten fürs Trockenheitsmonitoring (SATROMO) - swisstopo/topo-satromo
github.com
March 4, 2025 at 5:58 AM
davidoesch.bsky.social
I have 2500 vector datasets as webresource , each of it consisting of 38 polygons/ multipoly . Offered as csv (with separate shp with geom) geojson and geoparquet. Getting the Value of a specific polygon: with geoparquet: streaming does not require a download. …Performance with less code in Python
March 3, 2025 at 6:42 PM
davidoesch.bsky.social
STAC works perfectly with vector data, and with #cloudnative formats like geoparquet you get your serverless spatial infra . Example of cloudnative raster and vector item is swisstopo Earth. Observation data data.geo.admin.ch/browser/inde... - once you STAC, you never go back .
STAC Browser
data.geo.admin.ch
February 2, 2025 at 2:34 AM
davidoesch.bsky.social
Vorher und nachher
January 2, 2025 at 5:05 PM
davidoesch.bsky.social
Unter
s.geo.admin.ch/vhmcz9312psy ist ein eindrückliches Satelliten Bild von Sentinel-2 davon zu sehen .
Die Fläche die braun ist beträgt ca 2km2
s.geo.admin.ch/lmjlckikcr5r

Vorher/ nachher Bild
s.geo.admin.ch/jooffvjvn6k8

Quelle: swisstopo/ Copernicus www.swisstopo.admin.ch/de/satellite...
Maps of Switzerland - Swiss Confederation - map.geo.admin.ch
s.geo.admin.ch
January 2, 2025 at 3:49 PM
davidoesch.bsky.social
Making of www.linkedin.com/posts/davido...
David Oesch on LinkedIn: Wie viele Briefkästen gibt es? Eine Open-Source-Webanwendung zur Schätzung…
Mit der webapp „Wie viele Briefkästen gibt es?“ ist es möglich die Anzahl der Zustelladressen in einem benutzerdefinierten geografischen Perimeter…
www.linkedin.com
December 22, 2024 at 6:52 PM
davidoesch.bsky.social
Das limit is der GitHub action runner : 12GB auf dem home directory der Dir zur Verfügung steht. Wie schaffst Du es ein 40Gb pmtiles File herausstellen?
November 25, 2024 at 6:40 PM
davidoesch.bsky.social
Sehr gut gemacht… eigentlich lässt sich damit ein ganzes geoportal mit x Datensätzen betreiben. Hast du schon Erfahrung mit Raster Daten gemacht?
November 25, 2024 at 4:19 PM
davidoesch.bsky.social
@swisstopo ist auf Insta , x und LinkedIn… werde mal nudgen …
November 22, 2024 at 12:36 PM