Export sourced photo positions to GPX

Keep originals and check explicit GPS time

Turn the embedded GPS positions in original trip photos into a sparse GPX track or waypoint set. Keep every source photo and audit exact GPS UTC ordering, equal-time ambiguity and coordinate provenance.

1–500 original JPEGs, 10 MiB each and 100 MiB total. Filename labels allow up to 512 UTF-8 bytes; the operating-system file picker may impose a shorter basename limit.

GPSDateStamp and GPSTimeStamp must explicitly provide Gregorian UTC in years 0001–9999. Hours/minutes are integers and seconds must be exact to at most 9 decimal places. No local-clock, camera-time, filename or file-time fallback; leap seconds and recurring fractions are unsupported.

• Choose all original JPEG photos for the trip.
• Select track or waypoints, set the track gap threshold and confirm WGS84 only if you know the missing datum.
• Run and inspect every UTC, source index, coordinate and ambiguity row.
• Download the ZIP; open GPX in a compatible reader and use JSON plus originals to audit provenance.

Choose connections and datum deliberately

Declared WGS-84/WGS84 is supported. A missing datum requires your explicit WGS84 assumption; a declared different datum is always refused. Source rational coordinates remain exact in JSON; GPX decimals truncate toward zero to 12 places. Exact +180° longitude is represented as −180° with an equivalence flag.

Every photo becomes one point. Exact UTC sorts the points; equal timestamps retain selection order and are marked ambiguous. Track segments split only when an adjacent time gap is strictly greater than the selected 0–86400-second threshold; waypoint mode has no track segments.

These are sparse photo positions, not a measured continuous route. No road matching, interpolation, geocoding or GPX elevation is added. Original altitude/ref/version and every present GPS field type, count, source span and SHA256 are retained; critical fields also have raw hex. For a GPS field with rawHex:null, read the original JPEG at the report’s absolute valueOffset for byteLength bytes; its SHA256 identifies those exact raw bytes.

• Use waypoint mode when a line between photos would suggest a path you cannot establish.
• A gap of exactly 3600 seconds stays in the same segment at the default threshold; 3600 seconds plus 1 ns starts another.
• Equal GPS UTC times retain source selection order and remain explicitly ambiguous.

Open every complete deliverable

The screen lists every point and copies a bounded scalar summary. Download photo-gps-package.zip for all original JPEG bytes, photo-points.gpx, complete photo-points.json and formula-safe quote-all photo-points.csv. CSV text is apostrophe-prefixed; JSON and original bytes preserve exact text.

For a GPS field with rawHex:null, read the original JPEG at the report’s absolute valueOffset for byteLength bytes; its SHA256 identifies those exact raw bytes.

Recognize support and recover from a refusal

Baseline 8-bit SOF0 with one interleaved scan and terminal EOI; one Exif APP1 with classic little- or big-endian TIFF and GPS version 2.3/2.4. Progressive JPEG, BigTIFF, multiple-image MPF, JUMBF/APP11, XMP, trailers and unsupported structures refuse the whole queue.

Per photo: at most 4096 JPEG markers, 4 IFD directories, 512 entries per directory and 1024 entries. The entire queue allows 100000 IFD entries. Unknown GPS tags, aliased/cyclic directories, overlapping structures, malformed values or required missing fields fail atomically.

Protective output guards are GPX 4 MiB, JSON 8 MiB, CSV 8 MiB and stored ZIP 128 MiB; stricter input budgets dominate them. No photo is silently skipped and no partial package is returned on refusal or cancellation.

Processing stays in this browser; no files, names or coordinates are uploaded. The parser checks bounded JPEG/Exif structure without decoding pixels or certifying source GPS accuracy, complete JPEG/Exif conformance or device compatibility.

Any unsupported, malformed, missing-field or over-budget photo stops the entire queue. Choose supported originals or correct the source before retrying. Cancellation discards unfinished output; rerun the same selected files.