RuneScape Classic Wiki
RuneScape Classic Wiki
The main RuneScape Wiki has an article on: Skavid map
The Old School RuneScape Wiki also has an article on Skavid map.

The Skavid map is a quest item which players may receive from Ogre guards during the Watchtower quest. It is used with a light source to navigate in the caves beneath Gu'Tanoth.

Without the map characters will cycle from cave entrance to cave entrance without access to inside the caves. This can be useful when travelling around the area near Gu'Tanoth.

Map of the Skavid caves