You can find out where to get those Pokemon in your neighbourhood, town or city area. Pokemesh is the fully function map for Android users.
It is not available in the Google Play Store and you will need to visit their website and download the apk file. You also need to use a Google account other than the one that you are using for PokemonGo. This is to ensure that there is no chance that you are ban from the game due to the advantage gain by using the map.
Visit Pokemesh to download the map>>>