1R
First-rank (largest) settlement within a country
CA
Catchment area
DEGURBA
Degree of urbanisation
EU
European Union
GAUL
Global Administrative Unit Layer
GHSL
Global Human Settlement Layer
GHS-POP
GHSL gridded population estimates
GIS
Geographic information system
GTFS
General Transit Feed Specification
HEI
Higher education institution
JRC
European Commission Joint Research Centre
N1R
Not the largest settlement within a country (i.e., not 1R)
NSO
National statistical office
POI
Point of interest
PTR
Public transport
RC
Regional centre
RST
Rural and small town
SDG
United Nations Sustainable Development Goal