Missouri plates. I saw the tag number.

密苏里州车牌 我记下了车牌号。

For this, they turned to OpenStreetMap, an open-source rival to Google Maps in which volunteers had already tagged large numbers of solar plants.

为此，他们求助于OpenStreetMap——谷歌地图的开源竞争对手，志愿者已经在这个平台上标记了大量的太阳能发电厂。