iiinova — where your digital self keeps evolving

mdsumner @mdsumner.bsky.social · 03/10/2026

rangefinder hypertidy.github.io/rangefinder/ Try out stac stores in an interactive page, input a cog or server url, XYZ or WMTS, Zarr

Zarr on rangefinder https://hypertidy.github.io/rangefinder/, a slice of ghrsst around New Zealand, time select, zoom etc

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mdsumner @mdsumner.bsky.social · 16/07/2026

I spoke with confidence there

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mdsumner @mdsumner.bsky.social · 24/06/2026

GDAL /vsistdout is pretty dope gdal raster as-features --of GeoJSON --include-xy --include-row-col autotest/gcore/data/byte.tif /vsistdout/

$bash shell output of pixel info from a test tiff, in the form of a feature collection { "type": "FeatureCollection", "name": "pixels", "features": [ {"type":"Feature","properties":{"CENTER_X":440750.0,"CENTER_Y":3751290.0,"ROW":0,"COL":0,"BAND_1":107.0},"geometry":null}0, {"type":"Feature","properties":{"CENTER_X":440810.0,"CENTER_Y":3751290.0,"ROW":0,"COL":1,"BAND_1":123.0},"geometry":null}, {...$

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mdsumner @mdsumner.bsky.social · 26/03/2026

the gallery of real-world online Zarr stores {zaro} now tests against (via gha) zaro needs your feedback, this is a #Zarr engine in R using #Arrow for the heavy lifting (IKR!, main player is arrow::S3FileSystem) #RStats github.com/hypertidy/zaro

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mdsumner @mdsumner.bsky.social · 11/03/2026

does this seem helpful to anyone? yeah not me either, and it wasn't very easy to boot

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mdsumner @mdsumner.bsky.social · 10/03/2026

Might need to ease up on Claude a little

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mdsumner @mdsumner.bsky.social · 04/03/2026

must be time for bed I just hallucinated "you visit *too* often"

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mdsumner @mdsumner.bsky.social · 22/12/2025

just ran a Sentinel 2 query for every 100k grid square for March this year and pulled out unique instances there are 28696 unique grid codes

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mdsumner @mdsumner.bsky.social · 20/12/2025

For the record, I don't blame Dave

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mdsumner @mdsumner.bsky.social · 17/12/2025

I've definitely made this plot before but not realized why *I should* UTM zone 55S with 0-level MGRS tiles

a map of eastern Australia and Antarctica from the equator to ~80S, the UTM zone 55 S is decorated with the Military Grid (MGRS) level 0 tiles, a columnnar spread(y)sheet with an expanding base as you go south (each tile distorts horizontally to the east and west)

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mdsumner @mdsumner.bsky.social · 15/12/2025

is it wrong to feel somewhat validated by a robot

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mdsumner @mdsumner.bsky.social · 19/11/2025

Hmm why don't I ask this ...

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mdsumner @mdsumner.bsky.social · 21/10/2025

why tf does it suddenly work ...

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mdsumner @mdsumner.bsky.social · 11/10/2025

HIGHLY recommended, I have some reading to do

Yellow book cover of On Alexis Wright, title is interleaved text as WRITERS GEORDIE WILLIAMSON ON ALEXIS WRIGHT WRITERS. Includes little inset circular pics of Geordie Williamson and Alexis Wright

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mdsumner @mdsumner.bsky.social · 28/09/2025

The other day my mum went away on holiday and later asked me to go check the stove at their house

A section of the Holiday board game, mum looking worried and it's a go home step of the game

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mdsumner @mdsumner.bsky.social · 18/09/2025

my 14 year old question on SO was deleted finally, 33K views I think I asked a handful of questions ever, and this one was never answered very helpfully I just learned it eventually through practice

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mdsumner @mdsumner.bsky.social · 14/09/2025

This guy has a gig tomorrow at Mona

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mdsumner @mdsumner.bsky.social · 30/08/2025

Helluva list ... so happy to find it

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mdsumner @mdsumner.bsky.social · 30/08/2025

Found my old reading list, it extremely interesting and helpful to me. Wish I'd maintained it ... but restoring this into a partial list is going to help, a bit Was actively keeping it 1997-2000, and there's helpful notes of earlier years and some of what was going on (where I was etc)

A list of books read from a printed out word document, author, title, date finished

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mdsumner @mdsumner.bsky.social · 26/08/2025

fun with hillshade (of COP30 and ESRI imagery)

side by side aerial views of Obercorn, the left is straight ESRI world imagery, the right is hillshaded, a 10x10km region

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mdsumner @mdsumner.bsky.social · 02/08/2025

Fuck yeah, it's sunny and I can read and listen to Urge Overkill a little longer

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mdsumner @mdsumner.bsky.social · 01/08/2025

still using buildvrt? no need (since GDAL 3.11), template in your sources as a comma-separated list and then this json description can be opened by any GDAL-enabled tool

R code, simple json for the GDAL streamed algorithm with a %s template for a comma-sep list of raster sources (to be stacked up as individual bands)

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mdsumner @mdsumner.bsky.social · 26/07/2025

similar with the North (annoying my plots are out of sync)

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mdsumner @mdsumner.bsky.social · 26/07/2025

not so bad across the suite of 3 (the palletized version only takes the last layer it seems) - I intend to make a bucket with this mean(, na.rm) version is that of interest?

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mdsumner @mdsumner.bsky.social · 22/07/2025

or, a more permanent problem now? I see better coverage with the mean of the netcdf layers (second image)

palettized images of the Antarctic 25km seaice concentrations in July 2025, from https://noaadata.apps.nsidc.org/NOAA/G02135/south/daily/geotiff/2025/07_Jul/S_%Y%m%d_concentration_v3.0.tif

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mdsumner @mdsumner.bsky.social · 12/07/2025

Oh nice! Thanks for the pointer Yml this paper, was referenced in old maptools for geog direction which I used elsewhere too Sorry for image, I can't copy the link 🫠

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mdsumner @mdsumner.bsky.social · 04/07/2025

actually I lied, that was at low resolution, here is native GEBCO 2024 gist.github.com/mdsumner/daa...

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mdsumner @mdsumner.bsky.social · 04/07/2025

extremely silly and niche, where in the world is the elevation 4326m

world map of elevation from GEBCO, coloured with viridis colours blue-green-yellow, marked in pink where (at this scale) the elevation is equal to 4326m (parts of the Andes and Everest)

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mdsumner @mdsumner.bsky.social · 17/06/2025

Emperor penguins! (no context, this is somewhere, some time ... still working on the output) all using #rstats {targets} and {gdalraster} and {mirai}

a 3x3km scene in Antarctica, targeting known locations for Emperor penguin colonies. there's ice scape features and a small brown stain in the middle, Sentinel 2 imagery at 2m scale

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mdsumner @mdsumner.bsky.social · 17/06/2025

zoomed in to prove it's the ship ha

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mdsumner @mdsumner.bsky.social · 17/06/2025

this is a much much better image from longer ago, this is the game to catch the windows together

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mdsumner @mdsumner.bsky.social · 17/06/2025

I caught the Nuyina at Macquarie Island a few days ago in Sentinel imagery

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mdsumner @mdsumner.bsky.social · 05/06/2025

basically every time I get over excited it goes exactly like this there's real info in there I promise, but I messed up somewhere in something boring I'm not motivated about rn don't ever give up, you can do this!

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mdsumner @mdsumner.bsky.social · 04/06/2025

thank you {targets}, I'm addicted to looking at Sentinel imagery #rstats

9 scenes from Antarctica, from Sentinel 2 imagery, each 3km across, with either a penguin colony (at some time) or an Antarctic station right in the midel

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mdsumner @mdsumner.bsky.social · 15/05/2025

it looks like the yellow bad-data gap is pointing where the Nuyina needed to go

a polar map highlighting current sea ice extent (white to blue shade) on dark blue ocean around Antarctica, with continent in solid grey, there's a pink line showing recent weeks of the Nuyina icebreaker from Denman glacier, to Hobart, to Burnie, to Hobart, then back out to Macquarie Island. There are yellow "gaps" in the near-real-time data, not yet quality-controlled that don't entirely destroy the information in the picture, and one looks like an arrow along the voyage path. The sea ice data extent ends with the blue, not reaching Tasmania or New Zealand, outside of that is coastline outline in grey on black background.

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