75 lines
4.4 KiB
Markdown
75 lines
4.4 KiB
Markdown
|
# Route data — 274
|
||
|
|
|
||
|
|
Copied from `novoyuuparosk-wiki/ncmr-songs/wip/274/`, which is where these are
|
||
|
|
generated and edited. **Treat everything here as read-only**: change it upstream
|
||
|
|
and re-copy, or the two will drift.
|
||
|
|
|
||
|
|
## Files
|
||
|
|
|
||
|
|
| File | What it is |
|
||
|
|
|---|---|
|
||
|
|
| `274-lyrics-index.csv` | One row per sung line, resolved to its roster entry, with start/stop timing and coordinates. The file the video syncs to. |
|
||
|
|
| `274-lookup.csv` | The full roster — every named object on the stretch, sung or not. The page draws all of these; the index only covers the ones that get sung. |
|
||
|
|
| `274-route.json` | The road itself: `[km, lat, lon]` per point, for drawing the line. |
|
||
|
|
| `274-route-west.json` | A short run of R274 before the western cutoff, same format — km 30.46 to 35.53, ending exactly on the first point of `274-route.json`. The road arriving before 川端橋, in symmetry with the east stub. Also in the GeoJSON as `kind: route-west`. |
|
||
|
|
| `274-route-east.json` | A short continuation past the eastern cutoff — km 108.56 to 113.99, overlapping the main shape by 0.18 km so the join is seamless. For `東に続く`: the road visibly carrying on after the last named thing. Also in the GeoJSON as `kind: route-east`. |
|
||
|
|
| `274-districts.json` | The 大字 bands with entry/exit km — the strip across the top of the transect page. |
|
||
|
|
| `274-lookup.geojson` | Route line, one point per roster entry, and the bands as geometryless features. For anything that wants GeoJSON directly. |
|
||
|
|
| `274-transect.html` | The interactive page the video is based on. Self-contained; opens from disk. |
|
||
|
|
|
||
|
|
## Using the index
|
||
|
|
|
||
|
|
`start` / `stop` are `mm:ss.xx`; `start_s` / `stop_s` are the same in seconds.
|
||
|
|
`stop` is the next timestamp in the LRC, blank spacer lines included, so every
|
||
|
|
line has one and the spans butt up against each other without gaps.
|
||
|
|
|
||
|
|
Join to `274-lookup.csv` on `object`, which is unique across the roster. The
|
||
|
|
`sung` column is the line as it appears in the lyric — the three power stations
|
||
|
|
are sung without their operator prefix, so `sung` and `object` differ for those.
|
||
|
|
|
||
|
|
Two row types are not ordinary nodes:
|
||
|
|
|
||
|
|
- **`kind = district`** — the address headers. These have no single point; they
|
||
|
|
carry the first coordinate of the run they introduce, plus `km_from`/`km_to`
|
||
|
|
spanning it.
|
||
|
|
- **`kind = closing`** — `東に続く`, which is text rather than an object. No
|
||
|
|
coordinates.
|
||
|
|
|
||
|
|
**モトツ橋にモトツシェルター emits two rows** sharing one timing and one
|
||
|
|
coordinate. It is one structure to drive through — a bridge roofed by a shelter,
|
||
|
|
between モトツトンネル and 福山トンネル — and two separately inspected facilities
|
||
|
|
in the national registers. Light both or either; they are the same place.
|
||
|
|
|
||
|
|
## Caveats that matter for the visuals
|
||
|
|
|
||
|
|
**All three route shapes are single clean polylines.** Where R274 has a central
|
||
|
|
reservation — the divided climbs after 福山大橋 and through 占冠 — OpenStreetMap
|
||
|
|
draws each carriageway as its own way. The shapes follow one spine through those
|
||
|
|
sections: point spacing adds up to exactly the km span, and km strictly increases
|
||
|
|
along every file, so the line can be drawn point to point without sideways spikes.
|
||
|
|
|
||
|
|
**`km` is not an official kilopost.** It is measured along the OpenStreetMap
|
||
|
|
route geometry from a datum near 上野幌, because the route relation is broken
|
||
|
|
across the divided carriageway in 札幌. Official KP is roughly this plus 14 km,
|
||
|
|
unverified. Ordering, spacing and geometry are all internally consistent; only
|
||
|
|
the absolute labels would be wrong if shown as real KP.
|
||
|
|
|
||
|
|
**`offset_m` is the straight-line distance from the object to the road.** Some
|
||
|
|
things sung are well off the carriageway — 日高神社 is 221 m away, クオーベツダム
|
||
|
|
1798 m. If the camera follows the road, an object's own coordinate is not always
|
||
|
|
where the camera should point.
|
||
|
|
|
||
|
|
**The lyric is monotonic by km end to end** — no backward jumps — so a camera
|
||
|
|
driven by `start_s` moves forward continuously from km 38.41 to 106.22.
|
||
|
|
|
||
|
|
**The lyric ends before the music does.** Lines run 14.54 s to 492.66 s (8:12),
|
||
|
|
while the release master is 619.27 s (10:19). Roughly two minutes of music play
|
||
|
|
past 東に続く.
|
||
|
|
|
||
|
|
## Provenance
|
||
|
|
|
||
|
|
How the roster was built, what was verified by hand, and what is derived rather
|
||
|
|
than measured: see `274-dev.md` in the source directory. Several entries exist
|
||
|
|
only because they were found on Google Maps and are absent from OpenStreetMap
|
||
|
|
entirely — ten of them, including four of the eight shrines.
|