This is a lesson in three slides of the “more helpful” variety (an activity with specific steps, rather than an open ended exploration), but it does let the students go outside.
It requires compasses (of the north-south-east-west type) and protractors.
Since the students haven’t had similarity yet, the lesson makes no reference to it; I will return to this lesson once the students will be able to add the scale factor.
Click on the images for larger versions. For the satellite image a less detailed map will also work.