Well this is how I got the map with Chrome.
Click on one of the four the links on "Post Number:#5 » Postby mimichris » Fri Oct 06, 2017 12:41 pm"
You will be redirected to mega.nz
During the redirection timer, check quickly the URL.
It starts with
noref.php?url=https://mega.nz/#!UNg.............
After a few seconds, you will be redirected to Mega where you are invited to create a new account which is interesting because you get 50 GB Cloudspace for free.
But if you want to download the map:
Click again on a link @ "Post Number:#5 » Postby mimichris » Fri Oct 06, 2017 12:41 pm"
Now quickly copy in the URL everything what is behind "http://www.navitotal.com/noref.php?url="
paste it in a new window.
There you go.