Represent a multi-day hike as separate named GPX <trk> elements, one per
stage, while still treating the whole thing as one route on the overview.
GPX & build:
- gpx.ts: parseGpxStages (one stage per <trk>) + multi-track buildGpx.
- build-hikes.ts: per-stage stats with totals summed across stages so the
overnight gaps (distance, time) and the altitude jump between stages are
excluded; previewBreaks recorded where stages sit >1 km apart.
- types: HikeStage, manifest `stages?` and `previewBreaks?` (both optional —
single-stage hikes are unchanged).
Detail page:
- HikeStageNav: a light itinerary-stepper switcher (numbered nodes, active
glows in the accent) writing a shared stageStore.
- Selecting a stage scopes the metrics, elevation profile (x-window),
map (highlight + zoom, dim the rest) and photo strip/markers; "Alle
Etappen" shows the whole route.
Overview: live map and the prerendered static composite both break the
preview line across >1 km inter-stage transfers (previewBreaks).
Route builder:
- Mark any placed waypoint as a stage start (named) from the waypoint list
or the detail panel; export assembles each stage independently into its
own <trk>; import re-marks stage boundaries from a multi-track GPX.
Work-in-progress route-builder checkpoint:
- New RouteStatsBar and WaypointDetailPanel components.
- EditMap / ImageDropzone / WaypointTable / builderStore updates.
- Hoist the elevation gain/loss/range helpers out of build-hikes.ts into
src/lib/hikes/elevation.ts so the builder and the build share one
implementation.
Also bundled here (same file, couldn't be split cleanly): build-hikes.ts
now detects each hike's country at build time — 'CH' when a Swiss canton
matched, otherwise an OSM/Nominatim reverse-geocode — and writes it to the
manifest, feeding the new Kanton/Land filter.
Trail polyline now uses the same SAC white-red-white red as the /hikes
overview and detail pages so the live preview reads as the final
published track. Dropping geolocated images now reframes the edit map
to the new bounds via a shared `mapView.fitTick` signal — covers GPX
imports too if they ever wire it up.
Lets the user re-load a previously-exported GPX and keep iterating
on the same route — add a waypoint, fix a turn, retag an image —
without rebuilding from scratch.
The exported GPX interleaves user-anchor waypoints with densified /
snapped intermediates in a single `<trkseg>`. The importer doesn't
try to perfectly round-trip "manual waypoint vs intermediate";
instead it recovers the *image* anchors by matching `<wpt>`
coordinates against the trkpt sequence (1e-5° tolerance, ≈1 m),
plus the start + end trkpts, and reconstructs routedSegments from
the trkpts between adjacent anchors. The intermediate geometry is
preserved verbatim — no re-routing, no second elevation pass.
Image waypoints carry their `imageHash` + `imageVisibility` across
the round-trip so the build script can still re-attach the source
JPEGs on the next publish. Visual previews from those hashes are
deferred to a follow-up — for now an image anchor renders as a
hash-only badge in the waypoint table.
Auto-snap is forced off after import so the freshly-loaded geometry
isn't immediately overwritten by a routing API call. UI: a "GPX
laden" link-style button next to the existing Reset, confirms
before replacing a non-empty draft.
The pure parsers (`parseGpx`, `parseGpxImageRefs`) move from
`$lib/server/gpx` to `$lib/gpx` so the browser-side importer can
use them; the server module re-exports for back-compat.
With "snap to route" off, every waypoint pair shipped as a 2-point
linear segment with no `<ele>` anywhere — the page only enriched
elevations inside the snap path. The resulting GPX had a flat
altitude profile and the build script's gain/loss/min/max metrics
came out all zero.
Two changes:
* New `densifyLinearSegments` (default 25 m, matches Swisstopo's
coarsest DTM) walks every 2-point segment and seeds intermediate
vertices along the great circle. Snapped segments (already many
points from BRouter) are left alone.
* Page reactor now runs the same Swisstopo elevation enrichment in
the autoSnap-off path, so the GPX carries per-trkpt `<ele>` even
for fully manual / cross-country routes.
Elevation source unchanged: Swisstopo profile.json (COMB → DTM2 →
DTM25 fallback) is already the highest-resolution provider for our
Swiss-coverage hikes; no point swapping.
Also unifies the snap-path's inline enrichment call into the same
helper so there's one elevation code path instead of two.
Build pipeline (scripts/build-hikes.ts) parses per-hike GPX, encodes
images via sharp, reverse-geocodes the centroid against Swisstopo and
emits a typed manifest under src/lib/data/hikes.generated.ts (gitignored).
Track JSON + image binaries live outside /static; served in dev by a
small hike-images plugin in vite.config.ts, in prod by nginx (private/
images proxied through Node + X-Accel-Redirect for auth-gating).
/hikes overview: full-bleed Swisstopo hero map (HikesOverviewMap) sits
under the sticky nav, drawing one polyline per route coloured by SAC
tier (T1 yellow Wegweiser, T2/T3 white-red-white, T4-T6 white-blue-
white). Click navigates, hover thickens + tooltips. Layer toggle,
recenter, GPS controls mirror the detail map (minus images toggle).
Cards drop the trail SVG, gain a per-route icon + SAC marker
pictogram on the cover, altitude range, season label, and "Neu" badge
for recently-published hikes. Filter bar + totals strip recompute over
the currently-visible set.
/hikes/[slug]: hero map with elevation profile, photo strip with map
sync, scroll-position pin, GPX download, SAC marker stats + min/max
altitude + season.
Route-builder (/hikes/route-builder): client-side draft persisted to
localStorage, EXIF-driven image placement, snap-to-route via BRouter
(OSRM + linear fallback) and Swisstopo profile.json elevation
enrichment that handles degenerate same-coord segments via the height
endpoint.
Filter init switched from a script-time snapshot of data.hikes (which
sporadically returned a one-hike subset during dev hydration and
locked the page to that single hike) to a post-mount \$effect.
Content under src/content/hikes/ intentionally not included (WIP).
Alexander
