tracks and traces

I do not believe in glamorizing empty lots.

Who do you think pays more in property tax, the owner of this recently-sold five-story Bed-Stuy brownstone?

Photos from a recent tour with aci-d club on a blisteringly hot May day.

The federal government of the United States has a vast footprint.

We don’t build housing like we used to.

On January 6, 2026, the US Immigrations and Customs Enforcement agency expanded “Operation Metro Surge” in Minneapolis into “the largest immigration enforcement operation ever carried out” by sending over 2,000 agents to Minnesota.

Refresh for more.

Statistically speaking, if you’re reading this, it’s unlikely you know anyone who voted for Eric Adams (“America’s Mayor”) in 2025.

Every item at IKEA, sorted by price ascending from cheapest.

Early morning on the B48, my mind turns, as so oft it does, to thoughts of the Brooklyn Bus Network Redesign.

While hiking, I like to take photos of nature things to figure out later and post to iNaturalist.

I led four sessions at ITP Camp 2025, preserved here.

See also my post about my project at Dinacon 2025, Passive Acoustic Listening.

Back in 2023, I downloaded every research grade observation from iNaturalist and made a map that classified each one as a “local” or a “tourist,” depending on the length of the observer’s history in that area. iNaturalist has only grown since, and updating

Whale songs were first noticed by accident, when analysts tracking Russian submarines at the height of the cold war heard cetacean interference instead.

What percentage of the bird species in the Netherlands do I recognize?

A six-day trek across the Dovre, starting in the high alpine moors of Dovrefjell, climbing 2286m Snøhetta, and descending into the glacial valleys of Åmotan and Sunndalen.

a cat magpie frame manipulation brand new designs

Hello Hey what are you doing?

I exhibited Bird signs and cycles at MozFest House 2024.

KEYWORD: hall

KEYWORD: hall

Written to share some sights and sounds in the hopes that this is useful to other nature lovers planning independent travel to Jamaica outside the resort-industrial-complex.

converts a webpage to a bitmap and throws those bytes at your audio output it's a bookmarklet, remember those?

KEYWORD: camouflage

A short edit of some Adam Curtis clips that includdes only scenes with on-screen text, in random order.

I’ve always thought these sunshine maps were a little suspicious.

I was working on a map recently and tried to use SAGA in QGIS to make a multilevel b-spline raster from some scattered vector points.

Ophrys apifera Herminium monorchis Epipactis palustris Liparis loeselii Dactylorhiza All observed on June 18.

On the last day of FOSS4G, I went for a little hike with Will in the morning.

A quick map from Sentinel-1 SAR (satellite radar) imagery that shows recent flooding in the San Joaquin Valley around the Tulare Lake Basin and the towns of Corcoran, Alpaugh and Allensworth.

In 2010, cartographer Erica Fischer made some simple and spectacular maps of images added to Flickr.

This weekend I went on a bike ride I haven’t done yet: following the Ringvaart* (“circular canal”) around the former lake of Harlermermeer (“Haarlem Lake.”)

Land artists often practice a kind of landscape scarification.

Enter the orchids A few months after we moved to The Netherlands in 2020, Alison and I took a trip to a nursery near Hilversum that I had found while searching for horticultural destinations.

For my recent post about the Alta Via 1, I wanted to integrate iNaturalist observations.

186 species documented on iNaturalist, over 317 observations.

I analyzed historic data from ADS-B Exchange to map out the most common places that Oakland Police Department chooses to deploy their helicopters.

Anole À la carte food Abbey Abdomen Abrasive saw Abseiling Absolut vodka Academic conference Academic dress Acanthocereus tetragonus Accipitriformes Acerola Acerola family Acianthera Acrobatics Acrylic paint Action figure Acura mdx Adaptation Adventure Ad…

I discovered a phenomenal dataset of California agricultural land, identified by crop down to the specific field (sub parcel!)

I just returned from Recurse Center’s Never Graduate Week 2019 – an inspiring week of old and new friends and a familiar company.

At Signal Culture, I’m working on a generalization of the technique I used to make my “isometric spacelapses.”

(Skip to the demo?)

I saw an interesting visualization on Jason Davie’s website last night of Lloyd’s relaxation algorithm.

James and I paired on creating something with Mike Bostock’s Observable Notebooks.

Besides the interactive art jam and Tidal Cycles live coding workshops, I’ve been up to a lot at Recurse Center recently.

Most consequences of climate change will be felt most severely by the least wealthy and most vulnerable populations in the world.

I co-hosted two workshops at RC recently, one on Monday, and one on Tuesday.