Spatial Average Indicator ========================= Description ----------- Indicates whether spatial averaging is to be performed for the all-individual annual weighted means for sites that are flagged and in the same community-monitoring zone. The field may be "Y" and "N" for Monitor Planning Areas. Business Rules -------------- A spatial average indicator value is valid if: It is Y (for yes), or N (for no), AND One of the monitor Pollutant Area Code values is populated with a monitor planning area code, AND Community monitoring zone is assigned a value.