Creating the next generation of geospatial data tools for Python & the browser with GeoArrow, GeoParquet & GeoRust @developmentseed | he/him 🌈https://bsky.app/profile/kylebarron.devhttps://bsky.app/profile/kylebarron.dev/post/3mw4sbdcz422oPublished deck.gl-raster v0.8! - Initial globe view support - New icechunk example - Improved request latency for MosaicLayer - Fixed reprojection for images extending beyond ±85° latitude - Improved rendering precision at high zooms - Improved performance https://developmentseed.org/deck.gl-raster/blog/v0-8-release/22 Sep 2026 17:54 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mw4sbdcz422ohttps://bsky.app/profile/kylebarron.dev/post/3msxtvr5e3k2vZarrista: a new, faster Python library for working with Zarr data! 1.9x to 2.7x faster than Zarr-Python for reading local data. https://developmentseed.org/zarrista/latest/blog/2026/08/13/zarrista-faster-zarr-for-python/13 Aug 2026 14:24 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3msxtvr5e3k2vhttps://bsky.app/profile/kylebarron.dev/post/3mlvlnozv4k25Big speedups in deck.gl-raster v0.7: Retina display support, faster GPU pixel filtering, minimized latency to render 200GB COGs, center-out tile loading https://developmentseed.org/deck.gl-raster/blog/v0-7-release/ Thanks to @developmentseed.org for supporting this work!15 May 2026 14:55 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mlvlnozv4k25https://bsky.app/profile/kylebarron.dev/post/3ml25xhxvt22nNew deck.gl-raster example that compares two image sources with a slider. https://developmentseed.org/deck.gl-raster/examples/vermont-cog-comparison/04 May 2026 17:08 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3ml25xhxvt22nhttps://bsky.app/profile/kylebarron.dev/post/3mknp2btsvk2jNew: Zarr support in deck.gl-raster! Here's a GPU-driven animation of Zarr temperature forecasts, fully client-side, no server involved. https://developmentseed.org/deck.gl-raster/blog/initial-geozarr/29 Apr 2026 18:09 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mknp2btsvk2jhttps://bsky.app/profile/kylebarron.dev/post/3mijobmlcw22mNative 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) https://developmentseed.org/lonboard/latest/blog/2026/04/02/cloud-optimized-geotiffs-in-lonboard/02 Apr 2026 16:54 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mijobmlcw22mhttps://bsky.app/profile/kylebarron.dev/post/3mhiqhqa44s2yThree 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 https://developmentseed.org/deck.gl-raster/blog/v0-4-release/20 Mar 2026 14:36 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mhiqhqa44s2yhttps://bsky.app/profile/kylebarron.dev/post/3mhdohdbb7k24𝐝𝐞𝐜𝐤.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 https://developmentseed.org/deck.gl-raster/blog/v0-3-release/18 Mar 2026 14:16 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mhdohdbb7k24https://bsky.app/profile/kylebarron.dev/post/3mh72agbm7224Also in Lonboard, new logo! Designed by @gusbusdraws.bsky.social, who also designed the @developmentseed.org Cloud Native Zine https://developmentseed.org/blog/2025-02-17-cloud-data-zine/ https://zines.developmentseed.org/zines/cloud-native/16 Mar 2026 18:04 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mh72agbm7224https://bsky.app/profile/kylebarron.dev/post/3mh72663nas24Lonboard v0.15 now supports geocoding! Easily jump the map to locations, using any geocoder service of your choice. https://developmentseed.org/lonboard/latest/blog/2026/03/13/releasing-lonboard-015/ @developmentseed.org16 Mar 2026 18:03 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mh72663nas24https://bsky.app/profile/kylebarron.dev/post/3meohbmzwps2lNew Lonboard release makes the first step towards rich 𝐫𝐚𝐬𝐭𝐞𝐫 data visualization in Python, starting with PMTiles! https://developmentseed.org/lonboard/latest/blog/2026/02/12/releasing-lonboard-014 - New RasterLayer, supporting PMTiles input via async-pmtiles https://github.com/developmentseed/async-pmtiles - New support for categorical data filtering on the GPU12 Feb 2026 16:52 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3meohbmzwps2lhttps://bsky.app/profile/kylebarron.dev/post/3mejlhbho222fBuilding on Vincent Sarago's work, I updated and published 𝐚𝐬𝐲𝐧𝐜-𝐩𝐦𝐭𝐢𝐥𝐞𝐬, an asynchronous PMTiles reader for Python: https://github.com/developmentseed/async-pmtiles This integrates with Obstore for efficiently reading remote files and Obspec for extensibility.10 Feb 2026 18:23 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mejlhbho222fhttps://bsky.app/profile/kylebarron.dev/post/3me5dynjfhk22Published 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 https://github.com/developmentseed/async-geotiff/releases/tag/v0.2.005 Feb 2026 21:38 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3me5dynjfhk22https://bsky.app/profile/kylebarron.dev/post/3mdxqhjmqzk2fIntroducing 𝐀𝐬𝐲𝐧𝐜-𝐆𝐞𝐨𝐓𝐈𝐅𝐅, a new library for reading GeoTIFFs and COGs. https://developmentseed.org/async-geotiff/latest/blog/2026/02/03/introducing-async-geotiff/ - 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 dependency03 Feb 2026 16:05 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mdxqhjmqzk2fhttps://bsky.app/profile/kylebarron.dev/post/3mde6cl2b2s2hNew 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 https://developmentseed.org/async-tiff/latest/26 Jan 2026 21:19 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mde6cl2b2s2hhttps://bsky.app/profile/kylebarron.dev/post/3mcimci2ei22fVisualize 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. https://developmentseed.org/deck.gl-raster/examples/naip-mosaic/ Built at @developmentseed.org with deck.gl-raster: https://github.com/developmentseed/deck.gl-raster15 Jan 2026 22:15 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mcimci2ei22fhttps://bsky.app/profile/kylebarron.dev/post/3mbu6bl2psk22Announcing deck.gl-raster: 𝐟𝐮𝐥𝐥𝐲 𝐜𝐥𝐢𝐞𝐧𝐭-𝐬𝐢𝐝𝐞 𝐂𝐎𝐆 𝐫𝐞𝐧𝐝𝐞𝐫𝐢𝐧𝐠. No server required. 1.3 𝐠𝐢𝐠𝐚𝐛𝐲𝐭𝐞 COG, streamed directly into the browser: https://developmentseed.org/deck.gl-raster/examples/land-cover/ - GPU-accelerated raster reprojection - GPU image processing for colormaps, nodata values - Efficient use of COG overviews07 Jan 2026 19:11 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3mbu6bl2psk22https://bsky.app/profile/kylebarron.dev/post/3m4vygbc5rs2yReleased 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 https://developmentseed.org/lonboard/latest/blog/2025/11/05/releasing-lonboard-01305 Nov 2025 21:26 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3m4vygbc5rs2yhttps://bsky.app/profile/kylebarron.dev/post/3m2rs43lnak2lI'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/ https://arrow.apache.org/committers/09 Oct 2025 18:31 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3m2rs43lnak2lhttps://bsky.app/profile/kylebarron.dev/post/3m2mcbbjn6s2uNew blog post! https://kylebarron.dev/blog/fast-python-bindings 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!07 Oct 2025 14:05 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3m2mcbbjn6s2uhttps://bsky.app/profile/kylebarron.dev/post/3lz55dw44222aNew Lonboard release and new demo! Integrating marimo and Apache DataFusion to visualize the NYC taxi dataset. https://developmentseed.org/lonboard/latest/examples/marimo/nyc_taxi_trips/18 Sep 2025 20:02 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3lz55dw44222ahttps://bsky.app/profile/kylebarron.dev/post/3lz26myspvs25Published a new version of parquet-wasm: https://github.com/kylebarron/parquet-wasm/releases/tag/v0.7.0 - 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 reader17 Sep 2025 15:47 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3lz26myspvs25https://bsky.app/profile/kylebarron.dev/post/3lwyxvp3nmc2nPublished 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! https://github.com/kylebarron/arro3/releases/tag/py-v0.6.022 Aug 2025 17:23 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3lwyxvp3nmc2nhttps://bsky.app/profile/kylebarron.dev/post/3lvvqiys2ic2wNew 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 https://geoarrow.org/geoarrow-rs/python/latest/api/io/flatgeobuf/08 Aug 2025 17:08 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3lvvqiys2ic2whttps://bsky.app/profile/kylebarron.dev/post/3lvlliogork2pNew blog post on Obstore, fast, multi-provider cloud storage access for Python: https://developmentseed.org/blog/2025-08-01-obstore/04 Aug 2025 16:11 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3lvlliogork2phttps://bsky.app/profile/kylebarron.dev/post/3lukmpezkds2uNew example notebook on visualizing Spatially-Partitioned GeoParquet with Lonboard, Obstore, and GeoArrow-Rust, using Overture Maps Foundation data! https://developmentseed.org/lonboard/latest/examples/overture-geoparquet/22 Jul 2025 13:35 +0000at://did:plc:xp4uaryknixcscaf2pajew36/app.bsky.feed.post/3lukmpezkds2u