Data Preparation For Kriging

Discussion created by traeumer on Jun 7, 2012
Latest reply on Jun 7, 2012 by EKrause-esristaff
I???ll be using ordinary kriging to create a surface of air pollution for Ohio. My data from the Toxic Release Inventory are annualized, so each case represents the amount of pollutant XYZ given off over an entire year.

My question is this: Should I aggregate (with the sum command) in cases where I have multiple chemicals given off by one facility at the exact same lat/long coordinates to create a total pollution score ??? or ??? should I allow for multiple chemical releases at the same location. I ask because I???m afraid I???ll bias the nearby values if I use the total score. Yet, the total score is a reflection of what was released there ??? so I don???t know what to do.