Tom Hengl
@tomhengl.bsky.social
120 followers 42 following 58 posts
Director at OpenGeoHub / and technical director at EnvirometriX. I am a data scientist passionately promoting open data & FOSS4G, automated soil mapping, Machine Learning for environmental data, global data sets, R spatial and spatio-temporal modeling...
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tomhengl.bsky.social
There are two global Lights at night images data sets (as far as I am aware of): the #VIIRS-based (500 m) covering 2011-2024 (doi.org/10.3390/rs13...) and DMSP (1 km) but covering 1992-2024 (doi.org/10.1038/s415...). I've used both data sets to derive Principal Components: doi.org/10.5281/zeno...
Principal components from 1992-2024 night-light images for India
tomhengl.bsky.social
Had an excellent conf at Perugia @openearthmonitor.bsky.social Global Workshop 2025. If you missed it, we video-recorded 📼 talks: www.youtube.com/playlist?lis...
Topics covered: #OpenEO #CDSE #Copernicus #deforestation monitoring... 🚧 some videos (3-4) unfortunately with poorer quality
Open-Earth-Monitor Global Workshop 2025 Perugia, Italy - YouTube
The Open Earth Monitor — Global Workshop 2025 “Open EO data and open source software as a foundation for monitoring the European Green Deal”, the 4th global ...
www.youtube.com
tomhengl.bsky.social
Had a privilege and pleasure to teach terra pkg (created by @roberthijmans.bsky.social et al.) and spatial sampling with R together with Alexandre Wadoux at the #EOSummerSchool2025 at WICC. You can follow the terra tutorial from here: differ.blog/p/processing...
📹: youtu.be/q9sQkg7BeAc?...
Processing large rasters using terra package for R: combining tiling and time-series modeling
Processing large rasters using terra package for R: combining tiling and time-series modeling
differ.blog
tomhengl.bsky.social
We are doing a 1hr webinar on 30-m resolution global soil mapping and the new #Open #soil data kindly hosted by @geoldn.bsky.social. To register: www.eventbrite.com/e/openlandma...
📅 24 September 2025
🕐 13:00 – 14:00 (CEST)
💬 Seminar language: English
GeoLDN webinars: geo-ldn.org/events/geo-l...
OpenLandMap-soildb: global dynamic soil data at 30 m resolution
Discover detailed global soil data at a high resolution of 30 meters on OpenLandMap-soildb - all available online!
www.eventbrite.com
tomhengl.bsky.social
The blog post about the poll we did today "15 practical questions about the present and future of the EO data science" is now available: differ.blog/p/quo-vadis-...
See if something surprises you in these results.
#EOSummerSchool2025
@opengeohub.bsky.social @openearthmonitor.bsky.social
Quo vadis EO data science? 15 practical questions about the present and future of the field
Quo vadis EO data science? 15 practical questions about the present and future of the field
differ.blog
tomhengl.bsky.social
Registrations are closing for the Perugia Global Workshop 17-19th September, 2025 #OpenEarthMonitor project earthmonitor.org/global-works...
Reserve your spot, register now 📣 : pretix.eu/opengeohubfo...
See you in Perugia!
tomhengl.bsky.social
🌍 Registrations for the Open-Earth-Monitor Global Workshop 2025 @openearthmonitor.bsky.social are Now Open! Join us in Perugia, Italy, September 17–19 "where open data meets real-world solutions for environmental challenges" (earthmonitor.org/global-works...).
To register: pretix.eu/opengeohubfo...
Global Workshop 2025 – Open-Earth-Monitor project
earthmonitor.org
tomhengl.bsky.social
Senior Developer / Software Engineer wanted: #OpenSource tools for #geospatial data at @opengeohub.bsky.social
Application Deadline: 1st of Aug 2025
Possible start date: 1st of Oct 2025
Duration: 3+ years,
Job location: Doorwerth, NL
Bruto monthly salary: starting at €4,494 gross
tomhengl.bsky.social
If you missed our @ai4soilhealth.bsky.social webinar on how to access and use Soil Health Data Cube for pan-EU (25 yrs of biophysical indices at 30m to 10m res; includes SOC density & land degradation indices) you can watch it here:
m.youtube.com/watch?v=DRT1... paper: doi.org/10.5194/essd...
Unlocking the power of open data for soil health
YouTube video by AI4SoilHealth
m.youtube.com
tomhengl.bsky.social
📢 Researchers wanted!
- PhD candidate: Hybrid geospatial modeling of carbon fluxes and associated uncertainty for scenario testing (opengeohub.org/jobs/researc... with Uni of Utrecht),
- Research assistant: modeling land use & land cover dynamics using ML & AI (opengeohub.org/jobs/researc...),
tomhengl.bsky.social
Embeddings simultaneously solve 3 fund problems of EO data science:
- data usability increases complete consistent and harmonized components (ARD),
- data is compressed as you can combine many overlapping systems,
- ML would likely lead to higher accuracy as it is easier to reduce model complexity,
tomhengl.bsky.social
Say goodbye to human-readable EO images. Computers do not need to look and think as humans to get work done. Accuracy and efficiency is all you need. Google EE team now makes 10m ARD (annual starting from 2020) synthetic bands / deep features (64 in total): developers.google.com/earth-engine...
Satellite Embedding V1  |  Earth Engine Data Catalog  |  Google for Developers
The Google Satellite Embedding dataset is a global, analysis-ready collection of learned geospatial embeddings. Each 10-meter pixel in this dataset is a 64-dimensional representation, or "embeddi...
developers.google.com
tomhengl.bsky.social
Interesting to see these numbers at #LPS25: @esa.int costs about €8B per year; Copernicus (especially Sentinel-1 a -2) is now the world leading source of open EO data, but this is still *only* 0.06% of GDP. USA invests almost 3 times more (per capita).