OperationMeasurement

object

Where a run measured. A buffer whose record does not name its measurement CRS is not reproducible — the same operation with the same parameters can produce a different geometry under a later strategy, and nothing would explain the difference.

• crsobject

  The CRS each kind of measurement happened in, keyed by kind. A distance is measured in a transverse Mercator centred on the data's own extent, recorded as its PROJ definition; an area in a global equal-area projection, recorded as its EPSG code.

  • (any other key)string

• fallbackboolean

  True when a measurement was made in a global projection rather than a local one, so a number measured globally is never read back as one measured locally.

• assumedCrsarray of string

  Inputs whose WGS84 was assumed rather than declared. The measurement is only as trustworthy as that assumption.