Observed arrival · 2026-11-13
City X-Ray maps Seoul’s building approval years
A searchable map and neighborhood comparison tool for the recorded approval years of buildings across Seoul.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Seoul residents comparing building age by neighborhood
- Worth noticing
- It excludes areas with fewer than 100 buildings with valid dates or more than 30% unknown dates, leaving 290 comparison neighborhoods.
Field notes
The map uses 250-meter grid cells for its broader view and switches to building-level display at closer zoom. Neighborhood comparisons are filtered by explicit sample-size and missing-data thresholds, while the page separately identifies 151,411 buildings without a known approval year. Listed inputs include national building GIS records and administrative boundaries; the 3D view notes that some heights are estimated from floor counts.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
◉HumanPersonal, local, civic, or handmade
One card from the complete issue