Dustin Carlino

I started a company! abstreet.uk If you want to build a project involving #OpenStreetMap, transport planning, #rust, #GIS, or related -- then get in touch!

@robinlovelace In case you're using it in Scotland, try out cnt.scot -- it's got extra contextual layers and prioritisation metrics for picking neighbourhoods

It's been many months since I last tried out the Low Traffic Neighbourhood (LTN) design tool developed by Dustin Carlino, and I'm blown away, it's on another level 🤯 Responsive, informative, intuitive, accessible, fully open. See for yourself here: a-b-street.github.io/ltn

@_TFCx_ Yes, a cadastre would work better! I've been trying use-land-property-data.service.gov.uk/datasets/inspi… and OS MasterMap in the UK. Good at starting prototypes, bad at finishing things :\ I don't have an alt account or an active blog with RSS, but will try and set something up soon

@CarlinoDustin Thank you! Sometimes, I wonder how many prototypes you have on the back burner :D. Instead of the building footprint, one might also use a cadastre (if there's a digital one available). (anyway, do you also have an alt account on bsky ?)

@CarlinoDustin Hey Dustin. I was wondering if a tool that auto measure the minimal width of each street using OSM exists. Would you know? It would allow to immediatly know what types of infrastructure is possible. I think that OSM has all the info required, no?

Ever wish you could explore the geometry of #openstreetmap from #python? Lukas Beuster has added osm2streets python bindings! Check out github.com/a-b-street/osm… to get started, and github.com/a-b-street/osm… if you're interested in how the #rust to #python bindings work

@_TFCx_ I'll keep you posted if I end up working on this idea more, and if you find any other methods, I'd love to hear about them!

@_TFCx_ And then plug into something like streetmix.net to figure out the required width of something you want to build. The building footprints (or other "obstacles") probably have to be somewhat accurate for this to work well, and it only makes sense in an urban area

🗺️ HOT Global Telemapathon 2024 🎉 Join us for a 24-hour livestream event on December 4th (12 2-hour sessions), celebrating open mapping to drive humanitarian impact. Register for the event here tinyurl.com/telemapathon24 (with @aleesteele) #OpenStreetMap @hotosm

@JamesLMilner @bdon Yeah stop teasing, what's new?!

@bdon Did I miss something?

new consumer map app user interaction just dropped

@WMATASoldier @turinginst a-b-street.github.io/15m/ A WIP rewrite of the old tool. Population data only in England, USA, and Belgium right now

@CarlinoDustin @turinginst Is this public? I didn’t know A/B had this function.

How much traditional #GIS analysis can happen totally in the browser, using #flatgeobuf, #rust, #wasm, #openstreetmap, and a new @turinginst project for collating census data? This is output area-level population counts intersected with a 10min walking buffer around the red route

@joeAlane @LambethLivingSt @MalcolmClark77 If you like, give a-b-street.github.io/ltn/ a try for mocking these up in the future (and let me know if you hit any snags)

West Norwood LTN - Red access from Leigham Court - Green from Norwood Road/Knights Hill New eg driving routes in blue and orange. Think it would need improved bus routes eg From Leigham Court Road down to Brixton @LambethLivingSt @MalcolmClark77

@robinlovelace Now much easier to adapt the link above to other areas or forms with github.com/acteng/scheme-…; contact to get started. Also check out terradraw.io by @JamesLMilner for a modern map drawing library. mapbox-gl-draw is unfortunately very unmaintained

See acteng.github.io/atip/pipeline for an example of such a tool that runs client-side with a #Wasm backend written in #rustlang for sketching new routes. Credit: @CarlinoDustin. Available to use: anywhere (check the repo for technical details).

This could be handy for anyone developing applications for citizen science involving collecting geo data.

@rupestrecampos Thanks, good idea! I'm using an r-tree and union find to build up sets of polygons that should get dissolved, but then during the actual unioning, not doing any pruning to find pairs of merge yet. An rtree or grid should help

@CarlinoDustin try creating a grid with a reasonable square size and intersect each feature with grid keeping a grid ID. Then merge polygons on the same grid ID only

How can you dissolve/merge adjacent polygons while limiting to a max area (to avoid the enormous blob in the last image)? github.com/mbloch/mapshap… is very fast but can't limit area. I started github.com/acteng/will-it… but the speed is much worse. (Images have OS data) #rust #gis

Latest devlog covering a few new projects, all accessible right from your web browser! dabreegster.github.io/blog/june_2024/ #openstreetmap #rust #svelte #maplibre #maps #GIS #traffic #cycling #walkability #isochrones

@maeool @idoklein1 I don't know; I've not worked with RAPTOR before. With the above approach, I think I was seeing around 100ms for longer routes across London. I'll try and clean it up in the next few weeks and get a demo online

@CarlinoDustin @idoklein1 How much time would it take to compute a routing request e.g. in London with RAPTOR in the browser ?

Shortest paths and isochrones using #openstreetmap walking and #GTFS public transit data, directly in the browser with #Rust, #WASM, #MapLibre. The accessible areas when you're right on a tube or major bus line look very different than a transit desert (relatively, for London)

@nyuriks @quincylvania Wow, will try this out! This is some of the cleanest written SQL I've ever seen

@CarlinoDustin @quincylvania was working on it in github.com/openmaptiles/o…

Understanding the width of roads and sidewalks is vital for active travel. dabreegster.github.io/polygon-width is an interactive tool to calculate this. Does anyone know a good existing library for finding polygon center-lines? #rust #gis #wasm #openstreetmap #svelte

@kayvezk 2) This is proprietary OS data. In some places, there are more openly licensed road / sidewalk polygons available, so having a general method could be handy

@kayvezk Thanks for the idea! I tried this, but sadly 1) The road network layer doesn't really line up with the polygon centers too well. It could still maybe work to calculate width from this, even without good centering