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274-dev: correct watercourse count after the two exclusions

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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S6MpcBisZYhX45oDGRRJoz
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Mikkeli Matlock
2026-09-10 01:47:53 +09:00
parent 9df3cf9791
commit 616e4ee988
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@@ -102,9 +102,9 @@ size OSM splits into separate ways.
Cross-checked against the 国土数値情報 河川データセット (W05) via the Geoshape repository at Cross-checked against the 国土数値情報 河川データセット (W05) via the Geoshape repository at
国立情報学研究所 — all 561 named rivers of the 石狩川, 鵡川 and 沙流川 systems, since named 国立情報学研究所 — all 561 named rivers of the 石狩川, 鵡川 and 沙流川 systems, since named
rivers each carry their own 河川コード and are not in the 「その他」 group. 34 distinct rivers each carry their own 河川コード and are not in the 「その他」 group. The sweep found
names; 31 appear in both W05 and OpenStreetMap, and of those all but one agree on 34 names; two were dropped by the author (below), leaving **32**. Of those, 31 appear in
position to within 110 m. both W05 and OpenStreetMap, and all but one agree on position to within 110 m.
Offset is closest approach; under ~30 m means the road crosses it. Offset is closest approach; under ~30 m means the road crosses it.