Observed arrival · 2026-11-13
Measure Mapping: roof measurements from the map
A free Japanese map tool for estimating roof, wall, and site areas, measuring distances, and viewing hazard overlays.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People estimating roofs, walls, or site areas in Japan
- Worth noticing
- It says urban aerial-photo position accuracy is roughly within 1 m and warns that results are not for contracts or land registration.
Field notes
Users can trace a building outline or place points manually, then adjust a roof-area estimate using a selectable pitch. The page also describes subtracting openings such as skylights, calculating exterior wall area from perimeter and height, and exporting measurements in GeoJSON, KML, or CSV formats. It cautions that aerial-photo accuracy varies, especially on short edges, and that the tool does not determine property boundaries.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
⊠LoginAccess appeared gated
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
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