Example 10a: Using high-resolution background maps during zooming with fixed zoom factors

This is like the previous example, except that we want to zoom only to the resolutions of the two "hi_res" images.

The configuration file has been changed to specify that the "zoom_scale" must use the "hi_res_zoom" values from the file_of_filenames:

file_of_filenames = fof10.txt zoom_scale = hi_res .... .... So, for each 'click', the next hi_res map is shown..whether you zoom in or out.

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