novoyuuparosk-wiki/ncmr-songs
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

274-dev: complete the W05 river sweep, correct ホルカクルキ川

Browse Source 
The previous cross-check fetched only the 「その他」 group and ten main
stems, so 549 of the 561 named rivers in the three systems were never
looked at. Named rivers each carry their own 河川コード and are served
separately. Full sweep now done.

Corrects the claim that ホルカクルキ川 has no W05 counterpart: it does,
河川コード 8101030169, and its position agrees with OSM to the metre
(58.26 km, 9 m off). The 北海道 name plate on the bank confirms the
spelling and gives the Ainu original ホロカ・クルヒ (horka・kurihi) —
'to turn back' and 'its shadow'; horka marks a stream running counter to
its parent river. route01's ホロカクルキ was a slip.

31 of 34 names now confirmed by both sources, all but one agreeing to
within 110 m. Remaining: 名称不明 and デチン沢川 (W05 only), ベリベツ川
(OSM only). サヌシュッペ川 parallels the road and is tangent at two
reaches; it was never a disagreement.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S6MpcBisZYhX45oDGRRJoz
This commit is contained in:
Mikkeli Matlock
2026-09-09 23:36:46 +09:00
parent f902356840
commit f54cfdbc50
1 changed files with 24 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
wip/274-dev.md
+24 -16
View File
@@ -100,13 +100,13 @@ size OSM splits into separate ways.
### Watercourses the road meets ### Watercourses the road meets
Cross-checked against the 国土数値情報 河川データセット (W05) via the Geoshape repository Cross-checked against the 国土数値情報 河川データセット (W05) via the Geoshape repository at
at 国立情報学研究所, covering the 石狩川, 鵡川 and 沙流川 systems. 30 of 34 names appear in 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
both that dataset and OpenStreetMap, and 29 of those agree on position to within 110 m. rivers each carry their own 河川コード and are not in the 「その他」 group. 34 distinct
names; 31 appear in both W05 and OpenStreetMap, and of those all but one agree on
position to within 110 m.
Offset is closest approach; under ~30 m means the road crosses it. Source column: `both`, Offset is closest approach; under ~30 m means the road crosses it.
`W05 only` (official but missing from OSM), `OSM only` (in OSM with no official
counterpart at that position).
| km | Offset (m) | Watercourse | Water system | Source | | km | Offset (m) | Watercourse | Water system | Source |
|--:|--:|---|---|---| |--:|--:|---|---|---|
@@ -120,7 +120,7 @@ counterpart at that position).
| 52.11 | 16 | 夕張川 | 石狩川水系 | both | | 52.11 | 16 | 夕張川 | 石狩川水系 | both |
| 53.69 | 16 | ポンクルキ川 | 石狩川水系 | both | | 53.69 | 16 | ポンクルキ川 | 石狩川水系 | both |
| 55.14 | 143 | シイタルキ川 | 石狩川水系 | both | | 55.14 | 143 | シイタルキ川 | 石狩川水系 | both |
| 58.26 | 9 | ホルカクルキ川 | — | OSM only | | 58.26 | 9 | ホルカクルキ川 | 石狩川水系 | both |
| 58.56 | 52 | 滝沢川 | 石狩川水系 | both | | 58.56 | 52 | 滝沢川 | 石狩川水系 | both |
| 59.54 | 58 | 松竹沢川 | 石狩川水系 | both | | 59.54 | 58 | 松竹沢川 | 石狩川水系 | both |
| 63.02 | 8 | 名称不明 | 鵡川水系 | W05 only | | 63.02 | 8 | 名称不明 | 鵡川水系 | W05 only |
@@ -145,17 +145,25 @@ counterpart at that position).
| 107.29 | 18 | 滝の沢川 | 沙流川水系 | both | | 107.29 | 18 | 滝の沢川 | 沙流川水系 | both |
| 107.83 | 134 | ルウケシオマナイ川 | 沙流川水系 | both | | 107.83 | 134 | ルウケシオマナイ川 | 沙流川水系 | both |
Four to treat with care: Three to treat with care:
- **名称不明**, 63.02 km, 8 m off. Carried by W05 with no name at all. - **名称不明**, 63.02 km, 8 m off. W05 carries it with no name at all — the register has
- **デチン沢川**, 102.90 km, in 日高 town. In W05, absent from OSM. a name-shaped hole. Absent from OSM.
- **ホルカクルキ川**, 58.26 km in OSM, and route01 calls the valley ホロカクルキ川 — - **デチン沢川**, 102.90 km, in 日高 town. In W05, missing from OSM.
but no such name exists anywhere in W05, whose only クルキ name is ポンクルキ川. - **ベリベツ川** is named in both datasets, but the W05 geometry never comes within 300 m
- **サヌシュッペ川** runs beside the road rather than crossing it once, so the two of the road while OSM puts it 171 m away at 37.38 km, right at 川端橋.
datasets are tangent 5 km apart (62.46 / 67.62). The crossing is at 大和橋, ~64.4 km.
W05 also carries **ホロカユウパロ川** in the 石狩川 system — the Ainu form behind 夕張, **サヌシュッペ川** is not a disagreement: it runs beside the road rather than crossing it,
as a river name. Not near R274. so each dataset is tangent at a different reach (62.46 / 67.62). The crossing is at
大和橋, around 64.4 km. Any parallel watercourse behaves this way.
**ホルカクルキ川** at 58.26 km is confirmed three ways and agrees to the metre: OSM, W05
(河川コード 8101030169), and the 北海道 name plate on the bank, which reads 一級河川石狩川水系
ホルカクルキ川 and gives the Ainu original as **ホロカ・クルヒ (horka・kurihi)** — *horka*
"to turn back", *kurihi* "its shadow". In Ainu river naming *horka* marks a stream running
counter to its parent river, so the name records a hydrological fact. The same element
appears on **ホロカユウパロ川** elsewhere in the 石狩川 system — the Ainu form behind 夕張.
route01's ホロカクルキ川 is a slip: the writer applied the Ainu form to the Japanese name.
### PoI, in road order ### PoI, in road order