Summaries of selected talks from FedGeoDay 2026, Day 1, April 2026, US Census Bureau, Suitland, MD Once again, I served on the FedGeoDay organizing committee this year. FedGeoDay continues to be one of the higher-value events on my calendar, and this year was no exception. With a focus on data preservation and federal data stewardship, … Continue reading FedGeoDay 2026: Four Talks Worth Your Attention
Plausibility Is Not Provenance
Open a dataset of building footprints for a mid-sized city in sub-Saharan Africa. The polygons are clean. They snap to grid, close correctly, and sit at plausible addresses. Run them through any geometry validator and they pass. Load them in QGIS and they look, to every reasonable inspection, like a map. Some of them may … Continue reading Plausibility Is Not Provenance
The Typewriter
I first saw the typewriter when I rolled up the door of the shed. That small shed with the gabled roof and T-111 exterior had been there since the mid-1990s. My father built it with two sections. One was for his workshop and the other was intended to be my mother’s sewing room. I’m not … Continue reading The Typewriter
Twenty Years, Part Two
Note: This post is the second in a four-part series leading to the 20th anniversary of this blog. I was recently at a conference that was primarily focused on climate risk. One particular panelist caught my attention when talking about analyzing vulnerabilities by first creating a digital twin and then using an AI model to … Continue reading Twenty Years, Part Two
Spatial Analysis with Claude, Part 2
Following up on my previous post, I built a new Claude skill to take advantage of the increasing wealth of data online in cloud-native formats like GeoParquet. Given that DuckDB can read from such sources in place, I built the skill to use it to perform spatial analysis tasks on specified data sets. Here is … Continue reading Spatial Analysis with Claude, Part 2




