2. Monitor Rollback Settings: Select Rollback Regions and Settings.In this section, you
can specify the type of the rollback method(s) that you would like to use, as well as the location
of the monitors that you want to rollback.
Choosing theAdd Region button brings up the three rollback methods: Percentage Rollback,
Incremental Rollback, and Rollback to a Standard.
After choosing the rollback type, you then need to specify the amount of the rollback and the
region to which you want to apply it. In this example, we specified a 10 percent reduction, a
background of 0 ppb, and applied it to all monitors in all states by clicking theSelect All. So,
BenMAP will reduce all observations for all monitors in all states by 10 percent.
Note that just above the map of the states there are four buttons, typically seen in mapping
programs, that allow you to zoom in and zoom out, and to focus on the particular groups of grid
cells that interest you.
At any time you can change the grid cells that you have selected. This particular example is quite
simple, so we will use a more complicated example below. After choosing the counties where
you want to rollback monitors, click on theNext button. BenMAP will then perform the
Air Quality Grid Creation
BenMAP User's Manual 146 October 2012
rollback you specified on the monitors in the grid cells that you have chosen.
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castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD