Jose
jgomezdans.fediscience.org.ap.brid.gy
Jose
@jgomezdans.fediscience.org.ap.brid.gy
Remote sensing, Vegetation, fires, agriculture, data assimilation, Bayesian things

[bridged from https://fediscience.org/@jgomezdans on the fediverse by https://fed.brid.gy/ ]
Reposted by Jose
I can't believe I didn't know this fact before today - it seems so fundamental.

If you have a real symmetric matrix A, and pick some unit vector x, then x.Ax (the Rayleigh quotient) is bounded by the smallest and largest eigenvalues. So what happens if I pick […]

[Original post on mathstodon.xyz]
November 8, 2025 at 5:17 AM
Tarde de #BatchCooking : pollo asado, crema de puerros, fabes salchicheras y salsa de tomate casera a granel. Con eso, completando con unas ensaladas y cosas diversas, listo hasta el viernes
October 26, 2025 at 8:04 PM
Reposted by Jose
Los glaciares poseen un escudo que les protege contra el calentamiento global… 🛡️🌡️

Pero sus horas están contadas ⌛️

Dentro 🧵
October 17, 2025 at 11:10 AM
Hello, #gis #earthobservation #geospatial Has anyone tried JupyterGIS->https://eo4society.esa.int/2025/10/16/jupytergis-breaks-through-to-the-next-level It does look quite a tasty stir fry of jupyter lab and a (still) simple GIS thing, but potentially quite useful. #python
JupyterGIS breaks through to the next level
Launched in June 2024, JupyterGIS was introduced as a collaborative, web-based GIS environment built on the JupyterLab framework. Its objective is to bring QGIS-inspired workflows into the browser, enabling real-time collaborative editing, seamless integration with notebooks, and support for core geospatial data formats. When it was first announced earlier this year, JupyterGIS already delivered: * Real-time collaborative editing (Google Docs-style) * Visualisation of raster & vector data * Symbology editing and spatio-temporal animations * Programmatic map control via a Python API. Thanks to contributions from the community and support from partner organizations, JupyterGIS has advanced significantly and now offers an expanded range of features for analysis, visualization, and collaboration. **Enhanced vector tile capabilities** Support for vector tiles has been strengthened, including full compatibility with the _pmtiles_ format. Other key updates include: * An _identify tool_ that inspects vector tiles to display features and associated properties. * A _symbology panel_ that applies graduated, categorized, and canonical symbology to vector tile layers. These improvements enhance the interpretability and styling of geospatial datasets directly in the browser. The identify tool in action with a pmtiles vector dataset. The symbology panel in action, allowing for different notations. **A new processing toolbox** One of the most significant updates is a new browser-based processing toolbox powered by a WebAssembly (WASM) build of the Geospatial Data Abstraction Library (GDAL). Available tools include: * _Buffer_ : computes a buffer around geometries of a vector dataset. * _Convex Hull_ : calculates the convex hull for each feature of an input layer. * _Dissolve_ : combines features of vector layers into new features * _Bounding Boxes_ : calculates the bounding box for each feature in an input layer. * _Centroid_ : creates a new layer with the centroids of the geometries of an input layer. * _Concave Hull_ : computes the concave hull for each feature of an input point layer. This toolbox has been designed for extensibility, with a JSON schema that allows additional GDAL operations to be integrated in a straightforward manner. Using the processing tool to compute the convex hulls of geometries. **Symbology enhancements** Visualization of geospatial data has become more flexible and expressive through several enhancements: * _Viridis_ is now the default colormap, providing perceptually uniform visualization. * _Multiband symbology_ is now available for GeoTIFFs. * _Canonical symbology_ defined in GeoJSON files can be applied automatically. * _Colormaps_ can now be _reversed_ , allowing greater flexibility for data interpretation and visualization. * In the case of _point layers_ , color and marker size can be styled independently, and bound to different data. Setting color and radius based on data. **Integration with SpatioTemporal Asset Catalogs (STAC)** A SpatioTemporal Asset Catalog (STAC) browser is now embedded into JupyterGIS, streamlining access to different data collections. Users can select specific platforms and sensors, choose data products and processing levels, and set temporal and spatial constraints. It is now possible to search across multiple datasets simultaneously. Users can click on any result to add it directly as a layer to their JupyterGIS project. This creates a seamless workflow from data discovery to visualization, making it easier for researchers and analysts to find and integrate relevant satellite imagery and geospatial datasets into their Jupyter notebooks. Currently, the STAC Browser only supports the Geodes STAC API but support for all STAC catalogs is under way. Browsing a STAC access catalog from JupyterGIS. **Support for more data types** The range of supported geospatial data formats is now broadened with _GeoParquet_ and _PMTiles_**,** enabling efficient columnar storage and fast analytical queries for GeoParquet, and highly compact, streaming-friendly vector tile delivery for PMTiles. **User experience and interface improvements** The interface has been refined for a smoother workflow: * _Integrated control panels_ (layer list, filters, layer properties, etc.), reducing back and forth between the JupyterLab side-panels and the JupyterGIS UI. It also improves the “single document” scenario, allowing it to interact with JupyterGIS controls when opening a GIS document from the classic Jupyter Notebook UI. * An improved _toolbar design_ , with cleaner icons and better usability. * A new feature to center the map on your _current location_. * _Map annotations_ now link to the map: clicking an annotation automatically re-centers and zooms to the location. * _Full-screen_ mode support. **Legends for vector layers** JupyterGIS now automatically generates legends for vector layers, ensuring consistent interpretation: * Legends are dynamically updated to reflect current symbology. * Customizations such as reversed colormaps are preserved. Displaying legends in the layers panel. **JupyterGIS tiler extension** An extension for JupyterGIS enables the creation of JupyterGIS layers from _xarray variables_ in Jupyter kernels, with support for lazy evaluation, bridging geospatial workflows with powerful array-based computation. The package, called JupyterGIS-tiler, is available in GitHub here and can be installed from PyPI with _pip install jupytergis-tiler_. **Looking ahead** Development will continue to expand JupyterGIS in several directions: * Extension of the GDAL-based processing toolbox. * Deeper integration with QGIS and a richer Python API for automation. * A Story Maps Editor and Viewer to enable interactive communication of geospatial information through text, imagery, and maps. In the meantime, feel free to try JupyterGIS directly in your browser with JupyterLite, no installation required. Opportunities for engagement also include: * Checking out documentation for tutorials and the Python API. * Discussions via the GeoJupyter Zulip channel or the bi-weekly GeoJupyter hackathon. * Contributions to the development repository. The JupyterGIS community continues to grow, and active participation from researchers, developers, and educators worldwide is encouraged.
eo4society.esa.int
October 16, 2025 at 3:37 PM
Reposted by Jose
This guy made a Synthetic Aperture Radar (i.e. a radar that gives you camera-like pictures) mounted on a drone. Scroll to the bottom for actual sample pictures and a movie. Lots of tech detail and open-source designs and software […]
Original post on mastodon.me.uk
mastodon.me.uk
October 11, 2025 at 10:12 AM
Reposted by Jose
Spicy take:

Normal people shouldn't self host.

From an energy use perspective, the users per watt are WAY higher in a data center.

People are already awful at running patches and doing security updates.

OMG are people awful at doing backups.

From an ewaste POV, consumer electronics just […]
Original post on infosec.exchange
infosec.exchange
October 12, 2025 at 4:47 AM
Reposted by Jose
Happy Anniversary of the Battle of Cable Street, to all decent people.
October 4, 2025 at 12:41 PM
Reposted by Jose
El cacao ideológico nacional-ortodoxo-bolchevique de la #Rusia🇷🇺 de Vladímir Vladimiróvich nos lleva a momentos gloriosos como este, que sin duda hará las delicias de @espanabizarra

#noticias

https://mdza.io/k/UODj3jgiow
Russian city unveils monument to Soviet secret police founder Felix Dzerzhinsky to the sound of ‘Jesus Christ Superstar’ — Meduza
The city of Nakhodka in Russia’s Far Eastern Primorsky region has become the latest locality in the country to put up a new statue of Felix Dzerzhinsky, founder of the Soviet secret police.
meduza.io
September 16, 2025 at 3:35 PM
Reposted by Jose
It seems we will soon get the option to configure the touchpad gestures in @kde Plasma thanks to
Jakob Petsovits ( @jpetso ) and Natalie Clarius ( https://nclarius.github.io ):

https://blogs.kde.org/2025/06/12/gesture-customization-mini-sprint/

#kde #plasma
Natalie Clarius
Software developer, teacher and master's student in Tübingen — computational formal semantics, KDE, office automation, teaching
nclarius.github.io
September 6, 2025 at 3:43 PM
Sometimes I feel like working from a #coworking place and not the usual public library. Anyone got any cheap suggestions for cheap places in #northlondon #uk? #london
September 4, 2025 at 10:53 AM
Reposted by Jose
Your mother paints roundabouts and your father shouts at hotels.
September 1, 2025 at 8:37 AM
Wang, Y., Oliver, T.J., Croce, R. et al. Addition of longer wavelength absorbing chlorophylls into #crops could increase their #photosynthetic productivity by 26%. Nat Commun 16, 7933 (2025). https://doi.org/10.1038/s41467-025-62885-6
Addition of longer wavelength absorbing chlorophylls into crops could increase their photosynthetic productivity by 26% - Nature Communications
Incorporation of the far-red light adaptation of cyanobacteria into crops has been suggested as a potential strategy to increase photosynthesis and yields, but the magnitude of this benefits has not been estimated. Here, via 3D canopy model of soybean, the authors show that it could increase CO2 assimilation up to 26%.
www.nature.com
August 28, 2025 at 9:25 AM
Reposted by Jose
NASA press release on the successful NISAR launch. The satellite is in the planned orbit and in contact with the ground controllers at ISRO. Full deployment of all the satellite systems including the large reflector will take about 20 days, step by step. #nasa #isro #sar #satellite […]
Original post on mastodon.social
mastodon.social
July 30, 2025 at 5:56 PM
Reposted by Jose
Pues porque se acaba de reestrenar en cines 'Porco Rosso' y me apetece, voy a recordar una historia que escribí en su día en la Pajarería. Si fuera un profesional de esto, la haría a una hora en la que hubiera público, pero como soy un romántico y un ignorante […]

[Original post on journa.host]
July 25, 2025 at 9:08 PM
Reposted by Jose
«Alan Turing Institute scraps diversity drive under pressure from ministers»

Funny change in tune for an institute that was named after a person that was basically killed by the UK government for being gay. 🤷

https://archive.ph/JkOgI#selection-2204.0-2204.1
July 23, 2025 at 11:54 AM
Fediverso!!! La semana que viene me han plantado una telecon medio del día. El problema es que vamos a estar yendo de #madrid a #coruña (neno) en coche. Puede sugerir alguien alguna fonda, taberna o posada con WiFi para tener la telecon mientras me meto un cochifrito entre pecho y espalda? […]
Original post on fediscience.org
fediscience.org
July 18, 2025 at 6:27 PM
Reposted by Jose
July 2, 2025 at 5:47 PM
June 23, 2025 at 10:30 AM
Reposted by Jose
Si estáis pensando pillar una baliza V16 de las que obliga la DGT a llevar a partir de 2026, existe una de fabricación nacional, hecha con materiales reciclados, y que además por cada compra, donan 10€ a la Asociación Española de Investigación sobre el Cáncer (ASEICA).

Todo eso por el mismo […]
Original post on masto.nobigtech.es
masto.nobigtech.es
April 27, 2025 at 1:22 PM
Reposted by Jose
Reposted by Jose
If you're ever taking trains in Europe, please checkout Chuuchuu:
https://www.chuuchuu.com

It's a great site that uses historical train delay data to better estimate good train rates and realistic transfer windows between trains and such.

It seems like a must have to me but doesn't seem to be […]
Original post on en.osm.town
en.osm.town
March 3, 2025 at 8:14 PM
Reposted by Jose
ALOS-2 L Band SAR now available through Alaska Satellite Facility
“Previously, JAXA data weren’t freely available to outside scientists, so this agreement really, really opens things up,” said Dr. Gerald Bawden, the program scientist for ASF DAAC and the NISAR mission. “By having ASF distribute […]
Original post on mapstodon.space
mapstodon.space
May 16, 2025 at 3:40 PM