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  "road_source": "OpenStreetMap (local PBF extract)",
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  "osm_snapshot": "",
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  "elevation_licence": "swisstopo open government data (OGD): free use, attribution '\u00a9 swisstopo' \u2014 https://www.swisstopo.admin.ch/en/terms-and-conditions",
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  "license_url": "https://howsteep.org/licensing"
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}