100% credit goes to:
DieLikeKane for the amazing maps (https://dielikekane.com/gtav-fivem-map-mods/)
DementedDude (https://forum.cfx.re/u/dementeddude) and Virus_City (https://forum.cfx.re/u/virus_city/) for creating the server sided map scripts
i added the missing files to make the new map display properly on the radar and i replaced the original radar map texture from DLK's resources with a higher resolution texture that fixes the blur issues with the radar.
i've included the hd atlas map (map-atlas), the hd satellite map (map-satellite) and a hybrid version (map-hybrid; satellite map on pause, atlas map on radar) from DLK's maps, you only need to use one. place the folder you choose in your 'server-data\resources' folder and add 'ensure yourmapchoice' to your 'server.cfg' (replace 'yourmapchoice' with the name of the folder you chose).
check DieLikeKane's site if you want to see the difference between the map choices (you don't need to download these, just for reference):
DLK satellite map: https://dielikekane.com/2017/05/10/dlk-hd-satellite-map-for-fivem/
DLK hd atlas map: https://dielikekane.com/2017/06/06/dlk-hd-atlas-map-for-fivem/