mapcodes

2. A system of short alphanumeric codes used to identify precise locations, especially where street addresses are missing or unclear.

In rural areas without street names, mapcodes help emergency services locate people quickly.

3. Plural of mapcode, referring to multiple such location identifiers stored or shared together.

She saved all the mapcodes for the campsites in one list.

4. Codes printed on a map or chart that link a spot to a grid or index.

The hiking guide lists mapcodes for each viewpoint along the trail.