demand:
1. View pictures on the mobile phone, which can be zoomed in, zoomed out, panned, etc. (refer to the photo preview function of the mobile photo album).
2. Establish a coordinate system for the picture at the same time. When you pass in the coordinate parameters, you can enlarge the picture and navigate to the specified location to view it. (this is the key point)
3. It"s better to implement it with H5, or Android if you can"t. (IOS is not needed for the time being)

example:

500200