While recently researching how to load Bing Maps in ArcGIS Pro, the author conducted a simple packet capture of Bing Maps and discovered an unusual phenomenon. When requesting tile data, Bing Maps uses a request format that is noticeably different from common approaches. For example, services like Gaode Map typically pass xyz parameters, which correspond to x and y coordinates and the zoom level z. In contrast, Bing Maps passes a single integer parameter instead of three separate xyz values. How does this work? The image below shows a packet capture of Bing Maps requesting remote sensing imagery.
The image below shows a packet capture of Gaode Map requests.
Clearly, the request format of Bing Maps differs from that of Gaode Map. Bing Maps uses an integer parameter, while Gaode Map uses xyz parameters. So how is the Bing Maps request format generated?