tracelines¶
Extract the blue lines, never the circles.
tracelines turns a bounding box into GeoJSON polylines of continuous official street-level
coverage — the solid blue Street View lines — while rigorously excluding user photospheres and
photopets (the dots). It fuses Google (via streetlevel),
Mapillary, and KartaView.
Disclaimer
Research / educational tool, as-is, no warranty. The Google provider uses undocumented internal endpoints (via streetlevel) that may break without notice. You are responsible for each source's Terms of Service and your local law. Respect rate limits. Not affiliated with or endorsed by Google, Meta/Mapillary, or KartaView.
The HARD RULE¶
Output contains only genuine official Google car Street View coverage — never a user photosphere / photopet / photo-path, even a Google-hosted one.
This is the whole point of the tool, and it is enforced as a normative, testable contract — see Methodology — and proven with a reproducible sweep.
flowchart LR
A[bbox] --> B[z17 coverage tiles]
B --> C{Layer 1<br/>is_official_panoid?}
C -- no --> X[drop: photosphere/UGC]
C -- yes --> D[panoid graph]
D --> E{Layer 2 --precision<br/>source == launch?}
E -- no --> Y[drop: trekker/indoor]
E -- yes --> F[line_merge stitch]
F --> G[GeoJSON blue lines]Where to go¶
| I want to… | Page |
|---|---|
| Understand the pipeline internals | Architecture |
| See the exact filter rules (RFC-2119) | Methodology / Filter contract |
| Re-run the proof myself | Verification |
| Know what's car vs trekker vs photosphere | Findings |
| Know what I may do with the output data | Data provenance |
| Consume the GeoJSON downstream | Output schema |
| Read the API | API reference |
| Use the browser GUI | GUI |