Computes the anomaly for each slice in an existing multidimensional raster to generate a new multidimensional raster.
An anomaly is the deviation of an observation from its standard, mean, or median value.
This tool calculates anomalies over time for one or more variables in a multidimensional raster. If you have a nontime dimension in addition to the time dimension, the anomaly will be calculated at each step in the additional dimension.
For example, you have monthly ocean temperature data, collected every 1 meter of depth up to 100 meters, and you want to calculate the temperature anomalies as deviations from the yearly mean. This tool will determine the temperature anomalies based on a yearly mean if you set Yearly as the temporal interval to calculate the mean, and it will return anomaly values for each of the 100 depths.
This tool only supports multidimensional raster datasets that have a time dimension.
If Use current map extent is checked, variables of the layer that are visible within the current map extent will be analyzed. If unchecked, variables of the full layer will be analyzed, even if they are outside the current map extent.
The input imagery layer of a multidimensional raster dataset.
The variable or variables for which anomalies will be calculated. If no variable is specified, all variables with a time dimension will be analyzed.
Specifies the method that will be used to calculate the anomaly.
The mathematical methods for calculating anomaly values are listed below. Anomalies can be calculated using either the mean or the median values as the definition of the average. If the data distribution is skewed, the mean can be highly influenced by outliers, so the median value or z-score method may be better suited for this type of data.
Specifies the temporal interval that will be used to calculate the mean.
Specifies the reference raster dataset that contains a previously calculated mean for each pixel. The anomalies will be calculated in comparison to this mean.
Specifies whether missing values are ignored in the analysis.
The name of the layer that will be created in My Content and added to the map. The default name is based on the tool name and the input layer name. If the layer already exists, you will be prompted to provide another name.
You can specify the name of a folder in My Content where the result will be saved using the Save result in drop-down box. If you have the privileges to create both tiled and dynamic imagery layers, you can specify which layer type to generate in the output using the Save result as drop-down box.