Zarrista: a new, faster Python library for working with Zarr data! 1.9x to 2.7x faster than Zarr-Python for reading local data. developmentseed.org/zarrista/lat...

Zarrista: Faster Zarr for Python - zarrista

A low-level Zarr API for Python, powered from Rust by zarrs.

developmentseed.org

Big speedups in deck.gl-raster v0.7: Retina display support, faster GPU pixel filtering, minimized latency to render 200GB COGs, center-out tile loading developmentseed.org/deck.gl-rast... Thanks to @developmentseed.org for supporting this work!

New deck.gl-raster example that compares two image sources with a slider. developmentseed.org/deck.gl-rast...

New: Zarr support in deck.gl-raster! Here's a GPU-driven animation of Zarr temperature forecasts, fully client-side, no server involved. developmentseed.org/deck.gl-rast...

Native Cloud-Optimized GeoTIFF support in Lonboard! - Stream massive COGs on demand - Full control over image rendering: apply colormaps, change band combinations, use ML models - Read COGs from anywhere, including local files and private data (via Obstore) developmentseed.org/lonboard/lat...

An interactive geotiff viewer extension for #vscode / #positron powered by @kylebarron.dev's amazing deck.gl-raster. Just click on a tif file and take a peek. Early days but give it a spin and let me know if there are any issues. ✌️ github.com/belian-earth...

Three updates in deck.gl-raster v0.4: 1. New example for NDVI filtering on the GPU 2. When zooming in, render coarser image data while higher-res data is still loading 3. Fixed reprojection and rendering at high latitudes developmentseed.org/deck.gl-rast...

𝐝𝐞𝐜𝐤.𝐠𝐥-𝐫𝐚𝐬𝐭𝐞𝐫 𝐯0.3: fast GeoTIFF visualization in deck.gl - 𝐍𝐞𝐰 𝐓𝐲𝐩𝐞𝐒𝐜𝐫𝐢𝐩𝐭 𝐆𝐞𝐨𝐓𝐈𝐅𝐅 𝐥𝐢𝐛𝐫𝐚𝐫𝐲: high-level & fully-typed. We've fully migrated off of geotiff.js - 𝐀𝐮𝐭𝐨 𝐍𝐨𝐝𝐚𝐭𝐚 𝐦𝐚𝐬𝐤𝐢𝐧𝐠 - 𝐂𝐨𝐦𝐩𝐫𝐞𝐬𝐬𝐞𝐝 𝐄𝐏𝐒𝐆 𝐝𝐚𝐭𝐚𝐛𝐚𝐬𝐞 to 309kb - 𝐍𝐞𝐰 𝐩𝐨𝐫𝐭𝐬 of Affine and Morecantile to TS developmentseed.org/deck.gl-rast...

Also in Lonboard, new logo! Designed by @gusbusdraws.bsky.social, who also designed the @developmentseed.org Cloud Native Zine developmentseed.org/blog/2025-02... zines.developmentseed.org/zines/cloud-...

Lonboard v0.15 now supports geocoding! Easily jump the map to locations, using any geocoder service of your choice. developmentseed.org/lonboard/lat... @developmentseed.org

New Lonboard release makes the first step towards rich 𝐫𝐚𝐬𝐭𝐞𝐫 data visualization in Python, starting with PMTiles! developmentseed.org/lonboard/lat... - New RasterLayer, supporting PMTiles input via async-pmtiles github.com/developments... - New support for categorical data filtering on the GPU

Building on Vincent Sarago's work, I updated and published 𝐚𝐬𝐲𝐧𝐜-𝐩𝐦𝐭𝐢𝐥𝐞𝐬, an asynchronous PMTiles reader for Python: github.com/developments... This integrates with Obstore for efficiently reading remote files and Obspec for extensibility.

GitHub - developmentseed/async-pmtiles: Asynchronous PMTiles reader for Python

Asynchronous PMTiles reader for Python. Contribute to developmentseed/async-pmtiles development by creating an account on GitHub.

github.com

Published a new version of async-geotiff: - Support for reading band-interleaved GeoTIFFs and Cloud-Optimized GeoTIFFs - Initial support for decoding LERC, LERC_DEFLATE, LERC_ZSTD images - Fix computation of image bounds and resolution for rotated images github.com/developments...

Release v0.2.0 · developmentseed/async-geotiff

New Features feat: Support for band-interleaved data by @kylebarron in #80 feat: Add LERC decompression support by @kylebarron in #79 Fixes fix: Fix computation of bounds and res for rotated dat...

github.com

Introducing 𝐀𝐬𝐲𝐧𝐜-𝐆𝐞𝐨𝐓𝐈𝐅𝐅, a new library for reading GeoTIFFs and COGs. developmentseed.org/async-geotif... - Fast, with a Rust core - Uses a non-blocking thread pool for image decoding - Integrates with NumPy, PyProj, Affine & Morecantile - Remote data support with Obstore - No GDAL dependency

Introducing Async-GeoTIFF - async-geotiff

A fast, async GeoTIFF and Cloud-Optimized GeoTIFF (COG) reader for Python.

developmentseed.org

New version of async-tiff: Fast, async reading of TIFFs, GeoTIFFs & COGs in Rust and Python: developmentseed.org/async-tiff - New Array class for zero-copy data sharing between Rust/numpy - Separate CPU-bound and IO-bound work, decoding image data in a thread pool - Revamped metadata block caching

wikipedia turns 25 today! the last unenshittified major website! backbone of online info! triumph of humanity! powered by urge of unpaid randos to correct each other! somehow mostly reliable! "good thing wikipedia works in practice, because it sure doesn't work in theory" - old wiki adage

Visualize a mosaic of NAIP imagery loaded from @microsoft.com Planetary Computer COGs, all in your browser, no server involved. Render true color, false color infrared, or NDVI. developmentseed.org/deck.gl-rast... Built at @developmentseed.org with deck.gl-raster: github.com/developments...

Announcing deck.gl-raster: 𝐟𝐮𝐥𝐥𝐲 𝐜𝐥𝐢𝐞𝐧𝐭-𝐬𝐢𝐝𝐞 𝐂𝐎𝐆 𝐫𝐞𝐧𝐝𝐞𝐫𝐢𝐧𝐠. No server required. 1.3 𝐠𝐢𝐠𝐚𝐛𝐲𝐭𝐞 COG, streamed directly into the browser: developmentseed.org/deck.gl-rast... - GPU-accelerated raster reprojection - GPU image processing for colormaps, nodata values - Efficient use of COG overviews

Released Lonboard v0.13! - New layer types: H3, S2, Geohash, A5 and fixed HeatmapLayer - Render data layers beneath Maplibre text labels - Map UI controls: scale, fullscreen, navigation - Significant performance improvements: fixing earlier regressions developmentseed.org/lonboard/lat...

I'm happy to announce I've been promoted to an Apache Arrow Committer, meaning I'm authorized to merge code patches into Arrow repositories! I join this list of amazing people: arrow.apache.org/committers/

Committers

List of project-management committee (PMC) members and committers on the Apache Arrow project.

arrow.apache.org

New blog post! kylebarron.dev/blog/fast-py... This dives into performance pitfalls of Python bindings, why projects like Lonboard are so fast, and why I care about Apache Arrow so much. The post is high level and you don't need to know C/C++/Rust to understand it!

Our SIGMOD paper with our friends at Tsinghua + @wesmckinney.com + @pateljm.bsky.social on creating a next generation open-source data file format is out. F3 is a future-proof file format avoids the mistakes of Parquet. 📄 Paper: db.cs.cmu.edu/papers/2025/... 📁 Code: github.com/future-file-...

Last week Apache Sedona announced SedonaDB...and now I finally get to write about it! Here I use SedonaDB to demonstrate the explore/iterate/visualize cycle...SedonaDB's CRS support + @kylebarron.dev's `lonboard` is 👌 for exploring new data!) dewey.dunnington.ca/post/2025/st...

Stream network traversal with SedonaDB | Dewey Dunnington

Last Wednesday the Apache Sedona project announced SedonaDB. There’s also a great post on the Whereobots blog that has a bit more context, or if you’re like me and you just want to see the code you ca...

dewey.dunnington.ca

New Lonboard release and new demo! Integrating marimo and Apache DataFusion to visualize the NYC taxi dataset. developmentseed.org/lonboard/lat...

Published a new version of parquet-wasm: github.com/kylebarron/p... - Update to latest version of Rust parquet crate - Workaround to read Parquet data containing Arrow string view/binary view types - Streaming writes - Comparison between parquet-wasm and hyparquet, a pure-JavaScript Parquet reader

Release v0.7.0 · kylebarron/parquet-wasm

What's Changed Streaming Writes implementation by @H-Plus-Time in #305 Expose schema on ParquetFile by @H-Plus-Time in #599 Small doc fixes by @severo in #762 Bump to arrow/parquet 56 by @kylebarr...

github.com

Published arro3-core v0.6 with wider dtype support for converting numpy ndarrays to Arrow. It now additionally supports: - datetime64 - timedelta64 - fixed-width strings/bytes - variable-width strings - object arrays of str/bytes And the Python wheel is still just 2.5MB! github.com/kylebarron/a...

New GeoArrow-Rust release (& Python bindings) with a dedicated FlatGeobuf reader and writer: - Fast bounding box queries, pushed down to the original file format - Sync/async data reading through obstore - Fully Rust with no GDAL means easy installation geoarrow.org/geoarrow-rs/...

FlatGeobuf - geoarrow-rust

Python bindings to Rust implementation of GeoArrow

geoarrow.org

New blog post on Obstore, fast, multi-provider cloud storage access for Python: developmentseed.org/blog/2025-08...

We Needed Better Cloud Storage for Python so We Built Obstore — Development Seed

Obstore solves the friction we kept hitting in cloud-native workflows.

developmentseed.org

New example notebook on visualizing Spatially-Partitioned GeoParquet with Lonboard, Obstore, and GeoArrow-Rust, using Overture Maps Foundation data! developmentseed.org/lonboard/lat...

When the Delta Lake Python bindings take a required dependency on your library 😅. 2.6M downloads a month! 😱 Guess I'll never be making a breaking release now!! pypistats.org/packages/arr... arro3-core is 15x smaller in your environment than pyarrow! kylebarron.dev/arro3/latest/