Blog posts tagged with `engineering`

Christian Hollinger blog posts tagged with "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.

engineering
geospatial
data engineering
duckdb
sql
skaldmaps
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).

skaldmaps
engineering
geospatial
data engineering
data science
data quality