Blog posts tagged with data engineering
Christian Hollinger blog posts tagged with "data engineering", covering practical engineering notes, projects, and technical writing.
- ZIP codes are a bad spatial abstraction
2026-07-14: ZIP codes are delivery routes, not polygons. See how SkaldMaps combines ACS and other sources using ZCTAs, HUD-USPS crosswalks, spatial joins, and DuckDB.
engineeringgeospatialdata engineeringduckdbsqlskaldmaps
- Building confidence in geospatial data
2026-06-09: How SkaldMaps generates a confidence score for data attributes that helps you gauge how accurate data is (or isn't).
skaldmapsengineeringgeospatialdata engineeringdata sciencedata quality
- I used my homelab to start an LLC: Meet SkaldMaps
2026-05-25: I launched SkaldMaps, a SaaS for exploring and ranking U.S. ZIP codes, based on a previous homelab project. It runs a model on my R740XD.
skaldmapshomelabgeospatialgosqlduckdbdata engineeringweb
- New Website & Scala Days 2025 Announcement
2025-06-05: Some personal updates: My upcoming talk @ Scala Days 2025 in Lausanne, Switzerland, my new website, switching from Hugo, thoughts on the modern web & minimalism, and maintaining ink-free (for the ~2 people using my RSS feed).
scalafrontendgowebhugoastrodata engineering
- Bad Data and Data Engineering: Dissecting Google Play Music Takeout Data using Beam, go, Python, and SQL
2021-02-28: On the joy of inheriting a rather bad dataset - dissecting ~120GB of terrible Google Takeout data to make it usable, using Dataflow/Beam, go, Python, and SQL.
data engineeringlinuxbashgopythondataflowbeambig data