Summary
Instructions provided describe how to insert a subset grid into a base grid. It may be necessary to insert a smaller portion, or subset, of one grid into a larger, base grid. Functionality found in the Spatial Analyst 'Merge' command can perform this operation.
Procedure
Follow the steps below.
- Start ArcMap and add the base and subset grids to the data frame.
- Activate the Spatial Analyst toolbar, if not already active, and select Spatial Analyst > Options.
- Click the Extent tab.
- Set the Analysis Extent to Same as layer "<Base grid>".
- Click OK to close the Options dialog.
- Select, on the Spatial Analyst toolbar, Spatial Analyst > Raster Calculator.
- Use the Merge command in the Raster Calculator. Specify the subset grid first. This is an example of the syntax:
MERGE ([subset],[base])
- Click Evaluate and analyze the output Calculation layer for quality. If the layer is correct, right-click it and select Make Permanent. Save the grid to a permanent storage location.
Note:
For a complete description of how the 'Merge' command works, refer to the Spatial Analyst Functional Reference from the Desktop help.