Wildcrafting.net allows you to use Google Maps to mark exact locations where plants grow so that others can share in the bounty the Earth provides. Please follow the below guidelines when deciding when or if to mark a plant location.
Only mark if you're sure. Don't mark where you think a plant grows, mark where you KNOW it grows.
Mark only public lands. Do not mark your neighbor's garden or a farmer's field, unless they have trees that droop over public land such as sidewalks you can't harvest from their property. Mark roadsides, ditches, medians, parks, state forests, nature preserves, only government and public lands.
In cases where the plant is ubiquitous in the area, you do not need to mark every location. Mark the center of the area only, and explain that it covers a wide range. As a general rule of thumb, if one location can be seen from another location, you don't need to mark both.