An overview of raster analysis settings


The raster storage settings section of the Environment Settings dialog box provides settings for raster dataset results. Included are the following settings that can be changed: the default compression type, the default settings for pyramid creation and calculating statistics, and the tile size used when loading raster data to an existing raster dataset.

The following subtopics supplement the reference topics found in Environment settings.

Output cell size

The default cell size, or resolution, for analysis results is set to the largest cell size of the input raster datasets for a tool, the Maximum of Inputs.

The default cell size when a feature class is used as input to a tool is the width or the height (whichever is shortest) of the extent of the feature class divided by 250.

Exercise caution when specifying a cell size finer than the input raster datasets. No new data is created; cells are interpolated using nearest neighbor resampling. The result is as precise as the coarsest input.

Other options available

For tools that accept only features as input, you can specify the cell size for your output raster on the tool's dialog.

Mask

Sometimes you only want to perform analysis on cells in a particular area. The mask identifies those cells within the analysis extent that will be considered when running a tool. If the mask was overlaid on the input raster you want to use for analysis, only cells covered by the mask will be processed. All other cells will be assigned the NoData value in the result after running a tool.

Setting an analysis mask is a two-step process

See Also