This page contains a map which shows the relative location of the Wilderness of Judah.
North is towards the top. Scale is unknown.

Additional information:
Considering that paragraph 007 states that the people of Jerusalem and Judaea went out to John to be baptized by him, the wilderness in question in that paragraph might have been the Wilderness of Judah which is shown above. Considering that the paragraph also states that John the Baptist baptized people in the Jordan (instead of in the Dead Sea), then he might have been somewhere between Jericho and the north end of the Dead Sea. He nevertheless could have been farther north, as indicated by the fact that Jesus came from Nazareth to him to be baptized by him (paragraph 009).

Image acknowledgement:
The image of the map on this page was derived from an image of the map at http://www.holylandphotos.org