274: add the two missing signal posts; label strip by object name

滝ノ上信号場 (45.21 km) and 楓信号場 (57.76 km) were both absent. OSM tags
them railway=signal / railway=junction with no place tag, so they fell
through both the railway filter and the place layer that had caught
滝ノ下信号場 and 十三里信号場.

滝ノ上 was a passenger station until its demotion to 信号場 in 2024.

Strip marks now carry the full object name; the km line underneath shows
the extracted Name when it differs. Labelling by the stripped root alone
was ambiguous where several objects share a name.

CSV and GeoJSON re-propagated from the Markdown. 172 entries.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S6MpcBisZYhX45oDGRRJoz

wip/274-dev.md

@@ -84,6 +84,7 @@ feature's own. Machine-readable copies: `274-lookup.csv`, `274-lookup.geojson`.
 | 44.62 | 滝の上 | 北海道企業局　滝の上発電所 |  |  | power station | 142 | 42.91152 | 141.97021 |  |  |  |  | 夕張市滝ノ上 | ゆうばりしたきのうえ |
 | 44.62 | 滝の上 | 滝の上公園 |  |  | park | 69 | 42.91225 | 141.97000 |  |  |  |  | 夕張市滝ノ上 | ゆうばりしたきのうえ |
 | 45.21 | カミ | カミの沢川 |  |  | watercourse | 40 | 42.91059 | 141.97704 |  |  |  | 石狩川水系 | 夕張市滝ノ上 | ゆうばりしたきのうえ |
+| 45.21 | 滝の上 | 滝ノ上信号場 | たきのうえしんごうじょう | Takinoue Shingōjō | railway signal post | 43 | 42.91000 | 141.97642 |  |  |  |  | 夕張市滝ノ上 | ゆうばりしたきのうえ |
 | 45.29 | 滝の上 | 滝ノ上神社 |  |  | Shinto shrine | 100 | 42.90979 | 141.97873 |  |  |  |  | 夕張市滝ノ上 | ゆうばりしたきのうえ |
 | 47.66 | 滝の上 | 滝ノ上 | たきのうえ | Takinoue | place (neighbourhood) | 52 | 42.90347 | 142.00470 |  |  |  |  | 夕張市滝ノ上 | ゆうばりしたきのうえ |
 | 48.18 | チョポツナイ | チョポツナイ川 | ちょぽつない | Chopotsunai | watercourse | 63 | 42.90575 | 142.01006 |  |  |  | 石狩川水系 | 夕張市滝ノ上 | ゆうばりしたきのうえ |
@@ -108,6 +109,7 @@ feature's own. Machine-readable copies: `274-lookup.csv`, `274-lookup.geojson`.
 | 56.60 | 千紫 | 千紫橋 | せんし |  | bridge | 0 | 42.93414 | 142.07860 | 31.4 | 1988 | Ⅰ | 夕張市 | 夕張市楓 | ゆうばりしかえで |
 | 56.88 | 楓 | 楓 | かえで | Kaede | place (neighbourhood) | 711 | 42.94002 | 142.08407 |  |  |  |  | 夕張市楓 | ゆうばりしかえで |
 | 57.25 | 万紅 | 万紅橋 | ばんこう | Bankou | bridge | 0 | 42.93274 | 142.08627 | 27.6 | 1988 | Ⅰ | 夕張市 | 夕張市楓 | ゆうばりしかえで |
+| 57.76 | 楓 | 楓信号場 | かえでしんごうじょう | Kaede Shingōjō | railway signal post | 47 | 42.93157 | 142.09230 |  |  |  |  | 夕張市楓 | ゆうばりしかえで |
 | 57.84 | 登川 | 登川橋 |  |  | bridge | 0 | 42.93167 | 142.09327 | 21 | 1988 | Ⅰ | 夕張市 | 夕張市楓 | ゆうばりしかえで |
 | 57.84 | 登川 | 登川郵便局 |  |  | post office | 21 | 42.93185 | 142.09335 |  |  |  |  | 夕張市楓 | ゆうばりしかえで |
 | 58.23 | 花園 | 花園橋 |  |  | bridge | 0 | 42.92922 | 142.09647 | 58.6 | 1971 | Ⅱ | 夕張市 | 夕張市登川 | ゆうばりしのぼりかわ |

wip/274-lookup.csv

@@ -1,4 +1,4 @@
-km,name,object,kana,romaji,kind,offset_m,lat,lon,length_m,built,grade,oaza,address,address_kana,sources
+km,name,object,kana,romaji,kind,offset_m,lat,lon,length_m,built,grade,oaza,address,address_kana,location
 37.27,川端,川端,かわばた,Kawabata,place (neighbourhood),32,42.91538,141.89568,,,,川端,夕張郡由仁町川端,ゆうばりぐんゆにちょうかわばた,
 37.27,川端,川端駅,,,railway station,67,42.91483,141.89556,,,,川端,夕張郡由仁町川端,ゆうばりぐんゆにちょうかわばた,
 38.41,川端,川端橋,,,bridge,0,42.91715,141.90896,255,1991,Ⅰ,川端,夕張郡由仁町川端,ゆうばりぐんゆにちょうかわばた,由仁町
@@ -20,6 +20,7 @@ km,name,object,kana,romaji,kind,offset_m,lat,lon,length_m,built,grade,oaza,addre
 44.62,滝の上,北海道企業局　滝の上発電所,,,power station,142,42.91152,141.97021,,,,滝ノ上,夕張市滝ノ上,ゆうばりしたきのうえ,
 44.62,滝の上,滝の上公園,,,park,69,42.91225,141.97000,,,,滝ノ上,夕張市滝ノ上,ゆうばりしたきのうえ,
 45.21,カミ,カミの沢川,,,watercourse,40,42.91059,141.97704,,,,滝ノ上,夕張市滝ノ上,ゆうばりしたきのうえ,石狩川水系
+45.21,滝の上,滝ノ上信号場,たきのうえしんごうじょう,Takinoue Shingōjō,railway signal post,43,42.91000,141.97642,,,,滝ノ上,夕張市滝ノ上,ゆうばりしたきのうえ,
 45.29,滝の上,滝ノ上神社,,,Shinto shrine,100,42.90979,141.97873,,,,滝ノ上,夕張市滝ノ上,ゆうばりしたきのうえ,
 47.66,滝の上,滝ノ上,たきのうえ,Takinoue,place (neighbourhood),52,42.90347,142.00470,,,,滝ノ上,夕張市滝ノ上,ゆうばりしたきのうえ,
 48.18,チョポツナイ,チョポツナイ川,ちょぽつない,Chopotsunai,watercourse,63,42.90575,142.01006,,,,滝ノ上,夕張市滝ノ上,ゆうばりしたきのうえ,石狩川水系
@@ -44,6 +45,7 @@ km,name,object,kana,romaji,kind,offset_m,lat,lon,length_m,built,grade,oaza,addre
 56.60,千紫,千紫橋,せんし,,bridge,0,42.93414,142.07860,31.4,1988,Ⅰ,楓,夕張市楓,ゆうばりしかえで,夕張市
 56.88,楓,楓,かえで,Kaede,place (neighbourhood),711,42.94002,142.08407,,,,楓,夕張市楓,ゆうばりしかえで,
 57.25,万紅,万紅橋,ばんこう,Bankou,bridge,0,42.93274,142.08627,27.6,1988,Ⅰ,楓,夕張市楓,ゆうばりしかえで,夕張市
+57.76,楓,楓信号場,かえでしんごうじょう,Kaede Shingōjō,railway signal post,47,42.93157,142.09230,,,,楓,夕張市楓,ゆうばりしかえで,
 57.84,登川,登川橋,,,bridge,0,42.93167,142.09327,21,1988,Ⅰ,楓,夕張市楓,ゆうばりしかえで,夕張市
 57.84,登川,登川郵便局,,,post office,21,42.93185,142.09335,,,,楓,夕張市楓,ゆうばりしかえで,
 58.23,花園,花園橋,,,bridge,0,42.92922,142.09647,58.6,1971,Ⅱ,登川,夕張市登川,ゆうばりしのぼりかわ,夕張市