KartaView filters coverage on its server only in its PNG tiles (its JSON
tiles come back empty with a filter), so a filtered tile's PNG is a mask
over the cached JSON segments: a segment stays when at least half the
points along it lie on drawn pixels. A filter change reloads the lines
(lineCoverage.reload keeps the drawn ones until the new ones are in);
masks are cached per filter and tile, and a filtered tile KartaView is
still drawing (504 or a timeout) is asked again, four tries in all.
The nearest lookup asks the photo API for the projection and date, and
the cones follow the filter like Mapillary's. The gate fixture draws
filtered PNG tiles and adds an older flat-only street; a new gate step
checks 360 and LAST YEAR thin KartaView's lines and ALL brings them back.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Marker and direction (reported on the PR):
- KartaView has its own marker, a purple view cone (Street View's is
blue), not GEV's default pin that Mapillary uses.
- The camera direction (marker, cones, FOLLOW, a panorama's centre) is
the direction of travel to the next photo a few metres on. KartaView's
heading is the device compass: whole drives read 0 (no compass) and
others sit a steady ~110° off. Until the drive loads the compass stands
in (0 = unknown), and the pose is sent again once the course is known.
Remaining P4s from the review of #1121:
- Segment chaining is linear (a per-point cursor) and capped at 20,000
segments a tile and 5,000 points a line: a hostile tile of 60k segments
sharing one point took 1.5 s, now tens of ms.
- Decoded tiles are dropped when KartaView is switched off.
- No network / a refused request says so and is not retried as a timeout;
an unreadable answer says so.
- A docked flat photo skips the 2,560 px download until the viewer grows.
- The panel counts the drive's photos (countActivePhotos), not the thinned
page of cones (2,250, not 217).
- After a GPU reset the viewer redraws the photo itself, so a lookup the
user started is not cancelled; a failure is still reported.
- The gate's keyless page lights KartaView and checks it draws with no key;
the fixture answers the sequence count; the line-click step checks the
camera looks along the drive when the compass says 200°.
- README/CHANGELOG show the share-link form the app writes.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
From two agentic QA passes (UX and failure modes):
- A line click opens the nearest photo that can be shown: archived photos
(409; a HEAD says 200) and records without files are skipped, a few at
most, else 'KartaView's photos here are archived'. ‹ › skip them too.
- api.kartaview.org is HTTP/1.1 (six connections): tiles take three,
lookups two, sequence pages one, so a lookup never times out behind
tiles; a timed-out lookup is asked once more; waits are capped at 10 s.
- Sequence pages follow photo ids, not the index: a photo's page is found
by search, a neighbour page joins near an edge, so ‹ › neither skip at
page edges nor loop past gaps. Pages are 500 photos (~1.2 MB).
- ‹ › open through the core without framing: loading, errors and cones
behave as for any open; presses step on from the photo on its way; the
ends disable up front.
- Cones ignore the hidden IMAGERY / SINCE filters; no 'Selected' swatch
for a source whose lines never highlight; 'no KartaView photos in view';
an unreadable tile is not cached as empty; a 0,0 fix is no photo; a
failed lookup's error goes when another source is lit; the link goes
through the image proxy; a stalled panorama shows its front view after
15 s instead of 60.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Coverage lines from KartaView's z13-14 JSON tiles (OSM ways with photos,
chained end to start), the photo nearest a clicked line, cones along its
sequence, and a viewer for flat photos and 360° panoramas (a small WebGL
equirectangular renderer, no new dependency) with ‹ › along the sequence.
Mapillary's camera-driven line coverage and sequence cones move to the
provider-neutral core (lineCoverage.js, sequenceCones.js) with the tile
fetch, zoom ladder, colours and pick prefixes injected; Mapillary keeps
thin wrappers and its tests pass unchanged.
KartaView quirks handled: api.kartaview.org (the documented
api.openstreetcam.org serves empty tiles), photo URLs that name storage1
for photos stored elsewhere, and a photo API that answers 429 to more than
about three requests at once (two in flight, retried with backoff).
Co-Authored-By: Claude Opus 5.5 <[email protected]>
