G-DAR

G-DAR Is a radar editing tool for the Grand Theft Auto series of games, it supports GTA3, Vice City and San Andreas, allowing you to view and edit the radar through the one application. To edit the radar previous to the release of G-DAR you would have to split your radar into segments, add each segment to a file and then insert each of these into another file.
G-DAR Does all this for you, it allows you to export the entire map as a single image and re import it as a single image. It also supports full editing through the img archive and the import and export of individual radar tiles.

http://www.turnipfan.com/post_pics/gdar_rel_01_01m.gif

Features
- View the radar from within the img archive
- Supports GTA3 / Vice City / San Andreas radar systems
- Export / Import entire map as single image
- Import / Export individual radar tiles
- Export radar as collection of texture archives
- Alpha support for entire radar across all games
http://www.turnipfan.com/post_pics/dar_splash.jpg

Alternate download: Here

If you have trouble running the tool, make sure you have the..
.Net Framework 2.0 installed (Free to download here)
DirectX 9 + Managed DirectX Runtimes (Free from my own site)