Our data team at Mapbox along with the OSM-TW community recently completed mapping and aligning road network in Taiwan. The realignment was carried out mainly based on newly rendered Mapbox satellite imagery and Bing imagery.

Progress over Taiwan during road network realignment.

During this project, we observed offsets in Bing imagery in several areas when compared with Strava and GPS traces. All these offsets are now included in the Imagery Offset Database for the wider community to use.

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Imagery offsets in Taiwan.

For details on how to use the Imagery Offset Database in JOSM, please read @krisna’s diary post. For any feedback/suggestions, please comment below.

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