spacetimeboxes properties

Space-Time-Boxes (STB) are an extension of Geohashed spatial locations. More specifically, an STB is an alphanumeric string that represents a regularly shaped region of space and time.

Table 1. spacetimeboxes properties
`spacetimeboxes` properties	Data type	Property description
`mode`	IndividualRecords Hangouts
`latitude_field`	field
`longitude_field`	field
`timestamp_field`	field
`densities`	[density, density, density…]	Each density is a string. For example: `STB_GH8_1DAY` Note there are limits to which densities are valid. For the geohash, values from GH1-GH15 can be used. For the temporal part, the following values can be used: `EVER 1YEAR 1MONTH 1DAY 12HOURS 8HOURS 6HOURS 4HOURS 3HOURS 2HOURS 1HOUR 30MINS 15MINS 10MINS 5MINS 2 MINS 1 MIN 30SECS 15SECS 10SECS 5 SECS 2 SECS 1SEC`
`field_name_extension`	string
`add_extension_as`	Prefix Suffix
`hangout_density`	density	Single density (see above)
`id_field`	field
`qualifying_duration`	`1DAY 12HOURS 8HOURS 6HOURS 4HOURS 2HOURS 1HOUR 30MIN 15MIN 10MIN 5MIN 2MIN 1MIN 30SECS 15SECS 10SECS 5SECS 2SECS 1SECS`	This must be a string.
`min_events`	integer	Minimum value is 2
`qualifying_pct`	integer	Must be in range 1-100