On the Survey data source tab, on the Metrics page click ‘More’

‘Show extrapolated data’ enables extrapolated. off by default, sticky as you navigate between Sites

On the WATS data source tab, if it’s using Survey data it will use extrapolated data

Based on recurring removal schedules - if they’re not set up, nothing happens. variable or on call, nothing happens

extrapolation will work with imported survey data

if there is missing data, it will be filled in (this equates to a per-day entry of weight). You’ll know data is extrapolated when you hover to see the source record

existing extrapolated data is locked in

if there are multiple surveys, its using the closest real data point (forward or backwards), and extrapolate from that as far back to the Start Date on the removal schedule