CodeWalker GTAV Map Editor v.25 - New feature:
New Scenario mode allows scenarios (.YMT) files to be displayed, and the points can be selected and inspected.
Scenarios define placements of "ambient" spawns of peds, vehicles, and animals. They can also define paths for these spawned items to follow. By inspecting these points in CodeWalker v.25, many interesting things in Los Santos can be discovered.