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Preparation of polygons for main crop growing areas in the country and define cropping practices and conditions
In order to do any meaningful crop forecasting, crop conditions should be take into consideration. First of all it needs to be clear where crops are grown. The crop growing areas will be digitized for use with the CM Box software. Secondly, some characteristics on crops related to local practices will have to be recorded.
Preparation of polygons for main crop growing areas
In the following example a map will be created in right format (BNA) of the millet growing area in India.
USDA / NOAA has created a simple map that roughly denotes millet growing areas in India. 
Digitizing can be done by hand, but far more convenient is to use Windisp. A vector map of India is loaded into Windisp to be displayed in the background, using the File-Open-Map function. This will facilitate digitization. 
A new polygon will be digitized onto this map with the File-Open-Map function. 
Data are entered directly into the window. Flags could be specified as well, although one is not obliged to do so. 
