Setting the output and georeferencing

In this step, you can set the georeferencing and reprojection parameters for the output. You can select a new or existing file to receive the merged layers. You must first name the file that will receive the merged data layers in the name box.

Choose a file and path from the Name list box. If the file is not listed, click Browse and choose a file from the File Selector window. Existing files are not overwritten. The merged data is added to an existing file.
In the Output format list, select a format for the output file. If applicable, click Options to specify file creation options for the destination file.
By default, the destination file is created in PCIDSK format, but you can save the output to any GDB-supported file format. When merged results are written to existing files, associated georeferencing parameter fields are not available in step 2 of the Data Merge Wizard.
In the Georeferencing Setup area, set the following items:
- Projection: You can get the map representation, assigned to the output file, from an existing file by selecting a file option or you can manually enter it.
- Extents: Are the upper-left and lower-right corner coordinates of the output file. The bounds can be based on an existing file, derived from either the union or intersection boundaries of all the input file, or it can be entered manually.
- Union: Output file extents are large enough to include all input file extents. No data is cropped.
- Intersection: The output file extents are based upon the region of overlap for all input files.
- Resolution: Pixel dimensions can be based on an existing file or can be entered manually.
- Reprojection Parameters have the following settings:
- Resampling: Bitmaps are automatically resampled using the nearest-neighbor, bilinear-interpolation, and cubic-convolution methods.
- Transform Order: You can choose from Exact, Thin Plate Spline, and 1st Order to 5th Order polynomial transformations. Each pixel in a file is included in the calculation.
- Sampling Interval: For sampling intervals higher than 1, the reprojected position is calculated at each interval. A linear interpolation is performed for the values in between.
Click Next.