New layer request: soil type

I'm a botanist who frequently looks for rare plants. Certain soil types (limestone outcroppings and serpentine) are good predictors for rare endemic plants and I'd love to have a configurable soil type map where one can view maps of certain soil types. One could select the type of soil they want to see then the map would show the areas where that soil is. Or in another mode one could see all the soil types at once.