Climatology of snow cover and snow water equivalent

• Chapter V: Building climatological time series of snow cover data


•  
• General remarks
• Cloud gap filling
• Extracting data for a particular location
• Validation techniques

Extracting data for a particular location

Once the gap filling is done, daily "cloud-free" satellite data composites can be used to extract time series of snow cover days. Finding the pixel whose center coordinates are closest to the geographical coordinates of a particular point on the Earth is required for extracting snow cover data for the point in question. Most commonly it is done by using nearest neighbor sampling (Fig. 2).

Figure 2: The easiest way to extract values for a particular location is to determine the value of the nearest pixel center.