mapy-gpx-exporter

Export GPX files from Mapy.com route and place links — one link or a whole batch, from the command line or as a Python library.

Why

Mapy.com's web UI lets you export a planned route as GPX, but there's no public API for it and no way to batch-export a list of saved routes. This library reverse-engineers the two requests the "Export → GPX" button makes and wraps them in a clean, typed, tested client.

How it works

1. Map Places: Links such as https://mapy.com/en/zakladni?source=base&id=... are resolved through Mapy.com's public POI endpoint. The endpoint supplies the place's canonical position (the x/y query parameters are only viewport coordinates). Object line geometry is decoded into a local GPX track with its segments preserved; objects without line geometry become a GPX waypoint.
2. Anonymous Routes: GET https://mapy.com/s/{id} — Mapy.com replies with a plain HTTP 301 redirect; the full route state (waypoint geometry, routing profile) is embedded in the Location header's query string. We decode the proprietary rc parameter string and re-encode it as absolute chunks to GET https://mapy.com/api/tplannerexport, which returns the GPX file.
3. Saved Routes (dim links): If the link is a saved route, the geometry is stored server-side. We use pyfrpc to simulate Mapy.cz's FastRPC routing API (https://mapy.com/api/mapybox-ng/), locally decode the proprietary 5-bit delta-encoded geometry, interpolate elevations, and manually construct the GPX file locally.

This is an unofficial client built against publicly observable network behavior, not a documented or officially supported API. It does not bypass any authentication, paywall, or rate limiting; it only automates the same request an anonymous browser session makes when you click "Export → Save". Endpoint behavior may change without notice — see Limitations.

Install

Anonymous route links (rc links) only need the base package:

uv pip install mapy-gpx-exporter

Saved routes (dim links) require the optional FRPC support:

uv pip install "mapy-gpx-exporter[frpc]"

Map places also require the optional FRPC support because Mapy.com's POI endpoint uses FastRPC.

CLI usage

# single route
mapy-gpx export https://mapy.com/s/mukekodezu -o route.gpx

# single map place (decodes its object geometry locally)
mapy-gpx export 'https://mapy.com/en/zakladni?source=base&id=2139764&x=15.6340364&y=49.5820419&z=9' -o place.gpx

# batch: one link per line in links.txt
mapy-gpx batch links.txt --out-dir ./gpx --concurrency 5

Example output:

$ mapy-gpx export https://mapy.com/s/mukekodezu -o route.gpx
Saved route.gpx

Batch filenames are derived safely from each URL's path; query strings and fragments are ignored. If a filename collides with another route or an existing file, a deterministic suffix is added (name-2.gpx, name-3.gpx, and so on), so existing output is never overwritten.

Library usage

from mapy_gpx_exporter import MapyGpxClient

with MapyGpxClient() as client:
    gpx_bytes = client.fetch_gpx("https://mapy.com/s/mukekodezu")

with open("route.gpx", "wb") as f:
    f.write(gpx_bytes)

Batch export, async:

import asyncio
from mapy_gpx_exporter import AsyncMapyGpxClient


async def main():
    urls = ["https://mapy.com/s/mukekodezu", "https://mapy.com/s/another"]
    async with AsyncMapyGpxClient(max_concurrent=5) as client:
        results = await client.fetch_many(urls)
    for url, result in results:
        if isinstance(result, Exception):
            print(f"failed: {url}: {result}")
        else:
            print(f"ok: {url} ({len(result)} bytes)")


asyncio.run(main())

Limitations

• Only tested against the "planned route" (turisticka/planner) and activity traces.
• source=base object links are resolved through Mapy.com's public POI endpoint. Their line geometry is exported as a track; objects without line geometry are exported as waypoints.
• Route and object links require the optional FRPC support when Mapy.com returns FastRPC data.
• No authentication support — routes that require a logged-in session and are strictly private won't export.
• This relies on an undocumented, unofficial endpoint and reverse-engineered formats. Mapy.com can change it at any time without notice.

Development

uv sync --extra dev
uv run pytest
uv run ruff check .
uv run mypy src
uv run pre-commit install

License

MIT