Property developers use Zoning PDFs (RTRW) to check land use. For example, if you find a cheap plot in Pasar Minggu , a showing RTRW 2030 will tell you if that land is slated for a future jalan layang (flyover) or a green resapan (water catchment) area.
This body coordinates development across the five regions. They publish integrated maps showing intercity connectivity. Peta Jabodetabek Pdf
Note: Always check the publication date. A map from 2015 will miss the and LRT Jabodebek line. Property developers use Zoning PDFs (RTRW) to check land use