From GeoJSON

Converts the specified GeoJSON string to a Spectrum Spatial geometry instance. You can specify the name of the field on the input port that contains the GeoJSON formatted string as well as the name of the field to send the geometry to the output port.

Table 1. From GeoJSONOptions
Option Name Description
GeoJSON string The field containing the GeoJSON as a string to convert to a Spectrum Spatial geometry.
Geometry field The name of the field that you want to contain the geometry returned by Spatial Calculator; the default is Geometry.