Dataset: spain_latlong.csv

Source: J.M. Romera and H. Perez-Acebo (2020). "A New Method of Locating Roman Transport
Infrastructure," Journal of Cultural Heritage, Vol. 43, pp.175-185.

Description: Latitude and Longitude coordinates for 48 locations in the Iberian Peninsula,
based on Ptolemy's Geographia and the WGS 84 reference (GIS) system.
Data approximated from Figure 3 (p. 180) and Figure 5 (p. 181)

Variable Names
Long_ptol
Long_wgs
Lat_ptol
Lat_wgs