Fig. 1

The map of East Java and part of Central Java (right and left of the red line, respectively). Rawon is thought to have originated in the Kingdom of Surakarta (Central Java) as a royal cuisine. Over time, Rawon has transformed into a popular cuisine among commoners and a renowned delicacy in Surabaya (East Java). Note: The map is produced using QGIS and Google Earth applications. The map East Java is retrieved from https://www.indonesia-geospasial.com/2020/01/shp-rbi-provinsi-jawa-timur-perwilayah.html?m=1 and the map of Central Java is retrieved from https://www.indonesia-geospasial.com/2020/01/shp-rbi-provinsi-jawa-tengah-perwilayah.html?m=1