Zoning tells you the type of development allowed on a property. 

Rezoning is the process of changing a property’s zoning to allow for new development. 

Some rezonings also require a plan amendment if the proposed zone does not align with an existing development plan

You can find the zoning of a property through the zoning map and find zoning rules in the Edmonton Zoning Bylaw.  See What is Zoning? to learn more.