Your image can have a maximum length of 12,000px. As a minimum, we recommend images with a short side of 8,000px to 10,000px. The file type must be jpg.
If your map contains tiny or minute details or covers a very wide geographical area, consider uploading it in a larger size. This will ensure your image doesn’t lose quality when used in high-resolution screens and can be zoomed in with ease the map viewer.