This Grasshopper based tool ultilize the open api of baidu cutom map (https://developer.baidu.com/map/custom/) to get the map data within the requested boundary. Its label is not as rich as OpenStreetMap, but the data is far more complete in most Chinese cities.
The dowloaded map is automatically placed in correct model space and scaled to meter. A image stitching component is also provied to join all map tiles into a single image.
The annotations and styles of visible elements can all be customized. This allow the user to seperately extract the information. Then it can be processed with verterization tool (the Rooster plugin) to obtain building floorprint and network. This is also used to obtain the training data for city floorplan GAN.
A building density visualization based on the downloaded image data in Beijing
Vectorized data of residential building , labeled ased on POI information.