The key is not to store it in raster form in RAM. Either tiles (like GIMP) or I prefer Z-ordering. Then a user can zoom in and pan around easily - you let the system swap and it won&#x27;t be bad at all. If they zoom out though, you probably want to store MIP maps of it.<p>Swap works well for this as long as your data has good locality. huge raster images don&#x27;t.<p>But no, I&#x27;m not aware of any software that handles stuff like that well - except the GIMPs tiling, but that&#x27;s not going to help when zoomed out.