Title : Canadian Wheat Board Monitors Crops with IDRISI Company : Clark Labs Date : 22-Aug-2008 Downloads : 7

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The Canadian Wheat Board (CWB), the largest single seller of wheat and barley in the world, uses IDRISI Kilimanjaro to both assess and forecast crop yields internationally. Crop surveillance is a critical activity within the CWB, enabling them to make better estimates about global production on cereals, guide their marketing efforts, and determine sales strategies based on import and export forecasts. Crop surveillance and forecasting rely on several types of data, primarily satellite imagery and weather-based models. IDRISI Kilimanjaro is used as the primary image processing and analytical tool in the satellite surveillance component.

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I can't imagine how CWB may discrimanate between wheat and barley based on NDVI (or other Veg Indices) ? At the best of my knowledge, these crops are confusing. For example, the spectral signatures of two fields (the first with wheat, the latter with barley) planted within an interval of a few days are more similar than the spectral signatures of two wheat fields (or barley) planted within a larger interval of time (e.g. 10 days). My question is: (1) Do you use other information ( a priori information) than radiometric information ? What kind of information ? (2) Do you use sub-pixel classification to access pure areas within the coarse pixels (of SPOT VEGETATION MODIS ...) ? Can you give some details, please ? Thank you in advance ! - Ruxandra - Report As Inappropriate