There was a mod for Fallout 3 called ReducedUndiscoveredCompass by Kalniel, it reduced the compass radius of undiscovered locations by at least half, likely even more.

I can't seem to find anything like it for New Vegas apart from the mods that totally disable POI markers, something I'm not totally keen on :sadvaultboy:

*bump*

I take it you mean this mod?

http://www.fallout3nexus.com/downloads/file.php?id=1292

Here are the versions for NV, made them in like 5 mins... Take your pick:
NoUndiscoveredCompassMarkers: http://syndicate.visualshine.de/downloads/NoUndiscoveredCompassMarkers.esp
ReducedUndiscoveredCompass: http://syndicate.visualshine.de/downloads/ReducedUndiscoveredCompass.esp

Trademark

@ Trademark

Thank you for making these mods. I too had just as the OP been looking for one with reduced compass radius for undiscovered locations. I use it in FO3 all the time, always did.

Ah don't mention it, all it required was changing one gamesetting value and uploading it to a webspace. Might throw it on NewVegas nexus, but right now I can't be bothered haha.

Well tank you, i was also looking for something like this...

Thanks!

Once again, no problem

NVNexus: http://www.newvegasnexus.com/downloads/file.php?id=36525

Sorry for the delay getting back to this thread, I've been reinstalling windows, thanks Trademark, I can hopefully get back to playing some Fallout now

Good stuff, thanks! it is true that in vanilla the range at which you can 'see' undiscovered locations in your compass was extremely high.

20000 vs 1000. So yeh, quite a difference.
The alternate version is 20000 vs 5000 I believe.