Vaderstad Seed Hawk - Prescription Mapping Explained

Prescription maps are read into the system via three le types:
Shape le (*.shp)
Shape les indicate “zones” in the eld that will have dierent rates. These zones can
appear either as a grid or as more of a contour map. The le contains simple GPS poly-
gons, with each individual polygon mapping to a zone.
The system requires the following values for specic parameters in the shape le and
will not accept shape les without these values. Refer to an ICD for shape les for more
information: https://www.esri.com/library/whitepapers/pdfs/shapele.pdf.
o Shape le version = 1000
o Shape type = Polygon Shape Id (5)
Shape le index (.shx)
- Helps index into the shape le
- Can be used to speed up reading, currently NOT used by the SeedHawk system.
Database format (*.dbf)
The database format le species the rates used for each zone. The row in the dbf le
corresponds to the polygon id in the shape le. There can be multiple columns of data
in the dbf le that corresponds to dierent products that can be selected.
The system requires the following values for specic parameters in the dbf le and will
not accept dbf les without these values. Refer to an ICD for dbf les for more informa-
tion.
o Data Type = Numeric (‘N’)
When the prescription maps are used, they are read into the system and the shape and
dbf les are combined to create a single prescription map. The image to the right is an
example of a prescription map that has been read into the system.
Prescription Mapping
A prescription map, or variable rate map, is used to automatically adjust the
target application rate of a product for a particular eld area. Prescription
maps are downloaded from a user’s cloud account and pushed to the Gateway
via the iPad. Once enabled, the target rate data is used to control application
rate and displayed to the user as a color-coded map.
Example prescription map
View QuickStart video