Diagramming conventions

Are there any conventions or standards for maps and diagrams submitted in support of the prerequisites and credits under SLL and NPD? I've been looking for a simple method to portray, for instance, the intersection density of SLL Prerequisite 1, Option 2. An aerial photo of the site seems too visually cluttered, while using Google Maps' satellite or terrain view might be too simplistic. I don't know of any other resource that could offer what I need without a lot of tedious CAD tracing. I also am curious if there are any standard elements, such as property lines and building footprints, that should appear. Many thanks.