Biomass MAPS, often referred to as "imagery," are an index of the the vegetative state, size, and colour at the time of the picture. CropPro has biomass image sources from satellite and from our quad mounted real-time sensor, the GreenSeeker. We have a complete database of satellite imagery for all of Saskatchewan for over a decade of years. Having a large database of images over several years and seasonal time frames gives us an abundance of information. Images are useful if yield MAPS are not available. They provide a general index of how areas of the field may yield. Although they are not going to do this with great accuracy, they do provide valuable insight into the yield potential of the zones. We have not found images to be the finest layer for developing Zone MAPS. They are too variable from year to year in our area and most of the influences are moisture and maturity related.
The figures 1-5 above show five good images from a field and how much they vary. Producers could select one of these to be a Zone MAP. Figure 6 shows a normalized average that could be used as a potential Zone MAP also. Without the background electrical conductivity, elevation, and water flow MAPS we also have, it is impossible to decipher all the reasons that areas of fields yield high or low from historical data. We will collect all relative imagery for the fields of our clients and then compare the potential Zone MAPS of these to others, including our proprietary SWAT MAPS which are unanimously the most popular choice. If we use imagery we would build Zone MAPS out of Confidence MAPS.