Map Catalog Format and Definitions

{  
   "osm_south_asia_z11-z14_2019.mbtiles": { Every OSM vector mbtiles must hae this prefix -- required by openlayers javascript program
      "bittorrent_url": "https://archive.org/download/osm_south_asia_z11-z14_2019.mbtiles/osm_south_asia_z11-z14_2019.mbtiles_archive.torrent",
      "center_lat": "23.0",  folowing two + zoom define the starting point for initial map 
      "center_lon": "109.0",
      "date": "2019-10-08",
      "detail_url": "https://archive.org/download/osm_south_asia_z11-z14_2019.mbtiles/osm_south_asia_z11-z14_2019.mbtiles", This is the 
                     download source for this map region. Downloaded sqlite file is placed in /library/osm-vector-maps/viewer/tiles
      "east": "226.0",   The N,S,E,W values are the limits of the bounding box
      "north": "56.00",
      "osm_size": "8604721152",  This is the Total size of this region plus any overhead for osm zoom 0-10 and Satellite z0-9
      "perma_ref": "en-osm-omt_south_asia", The string which specifies the Menu item on the home page
      "publish": "True",  If false, not displayed in the Admin Console (I don't think the value is actually use)
      "region": "south_asia",  Short name
      "sat_is_regional": "False", not used
      "sat_size": "976416768",  Size of the Satellite mbtiles
      "sat_url": "not used",
      "seq": 80,    sorted values of seq, for all catalog items establishes the order of display in Admin Console
      "size": 14300418048,   Actual size of sqlite mbtiles
      "south": "-11.00",
      "title": "South Asia",
      "url": "https://archive.org/download/en-osm-omt_south_asia_2017-07-03_v0.23/en-osm-omt_south_asia_2017-07-03_v0.23.zip",
      "version": "v0.2",
      "west": "52.00",
      "zoom": "3"
    },