AirMap shows locations where you're not allowed to fly or need permission to fly per the rules in your country. The DJI GEO Map shows you zones where your drone will not fly (you physically cannot take off) until you unlock the zone. So, you'll need to use both.
All these tools are very good guidance but there’s no substitute for getting the facts and buying a real Sectional, VFR Navigation Chart (VNC) or the Terminal Area Charts VTA) and if you’re serious flyer, you need the Canada Flight Supplement so you can contact a aérodrome operator if you’re flying close to an aérodrome. If your taking the advanced Pilot test the Examiner will expect you to have and understand these data. The difference between a serious pilot and a hobbyist.