Viper 2.08 Specifications download pdf (Page 120)

Viper Installation and Operators Manual 2.08

110

Prescription

(Rx) Maps

Viper uses the shapefile format for prescripton maps that are displayed on the Viper

console. You must create a prescription map using the Raven Office software or

other GIS software capable of creating shapefiles. These shapefiles must be in the

polygon shape format that complies with the ESRI shapefile specifications. Shapefiles

must also be in the WGS84 datum.

When you create a shapefile, you must save it to the RxMaps folders so that you can

load the file at a later date. Save the three files with the extensions .shp, .shx, and

.dbf, to the folder.

When you create your prescription map, use a minimum amount of zones for the

map. This allows Viper to operate at its peak performance. When you create a

zone on the map, use the equipment width as a “rule of thumb”. The smallest zone

on the map should be no smaller than the width of the equipment applying the prod-

uct to the field. For example, if the equipment that applies the product is 90 feet in

length for each swath, your zones should not be less than 90 feet wide.

If you are using the multi-product feature, Viper can variable rate up to five products

when referencing a prescription map or maps. You can create an individual map for

each product or create one map that contains the information for each product con-

tained in the .dbf file.

The following table is an example of a single map that contains multiple product

information.

Important: If the prescription map contains zero rate zones,

the system must have either a PWM or Fast valve controlling

product. You must also program the valve type to C-PC (PWM

Close) or C-FC (Fast Close) mode, depending upon which

valve is installed in the system.

If the system contains a fast valve, the valve must be plumbed into the main product

line. You cannot plumb the valve into a bypass line.

Nitrogen Potassium Phosphorus Lime

100.0 20.0 15.0 750.0

125.0 17.0 33.0 200.0

85.0 45.0 21.0 600.0

50.0 0.0 18.0 925.0

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Viper 2.08 Specifications Page 120