* Geo- refers to the earth or the ground. Examples: geography, geospatial.
* Topo- refers to place or location. Examples: topography, toponym.
* Loc- is a shortened form of "location" and can be used in compound words. Examples: relocate, localized.
* Site- refers to a specific place. Examples: site map, onsite.
* Place- refers to a specific location or position. Examples: placement, place holder.
The best prefix to use will depend on the context of the word you are trying to create.