Greater Bay Area Map, Hanging

For measuring distances of roads, streams, etc. on maps with Four scales; 1:75k, 1:50k, 1:25k, 1:20k. The wheel features kilometre measurements on both sides. Use method: Move the pointer to zero, at the scale of 1:1. The small wheel alignment measuring address as a starting point, along rounting slip(rolling) to the end, according to the map of the ratio of the corresponding scale, is up point to the end of the number of kilometers.

Based on classic map cartography (Robinson projection), this raised relief map of China has a place on the wall of every geography classroom. A superb rendering of the geological features of our country. Size：29.7*21cm Simplified Chinese