![]() Happens when the data were collected by an airplane which only flew over So if we haveĪ dataset that has a shape that isn’t rectangular, some pixels at theĮdge of the raster will have NoDataValues. This is a value assigned to pixels where data is missing or no data wereīy default the shape of a raster is always rectangular. Raster data often has a NoDataValue associated with it. Jump to a later episode in this series for information on working with By default the raster() function only imports theįirst band in a raster regardless of whether it has one or more bands. However, raster data can also be multi-band, meaning that one rasterįile contains data for more than one variable or time period for eachĬell. ![]() Raster statistics are often calculated and embedded in a GeoTIFF for Values represent the min/max elevation range at our site. ![]() In this case, given we are working with elevation data, these It is useful to know the minimum or maximum values of a rasterĭataset. The UTM zones across the continental United States.įrom: Calculate Raster Min and Max Values Image source: Chrismurf at English Wikipedia, via WikimediaĬommons (CC-BY). Note that the zone is unique to the UTM projection. Roundness is calculated) for the data is WGS84
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