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How To: Create raster dataset and Mosaic raster datasets stored in ArcSDE

Summary

To mosaic ArcSDE raster datasets there are two general steps, loading the raster dataset into ArcSDE and mosaicking the raster dataset. There are two different ways to load a raster dataset into ArcSDE: 1) Create a brand new, empty raster dataset, which acts as a place holder. 2) Copying one of the constituent raster datasets, from the rasters to mosaic, and pasting into ArcSDE.

Procedure

This method describes creating a mosaic using Create Raster Dataset to make an empty ArcSDE Raster Dataset. This is used as the target for the Mosaic operation. Some knowledge of the rasters selected for mosaicking should be obtained prior to this implementation, for example: Cell Size, Number of Bands, and Pixel Type

  1. Open Create Raster Dataset.

    ArcToolbox > Data Management tools > Raster > Create Raster Dataset

  2. Enter parameters based on rasters to mosaic:
    - Specify the output location and the name of the final dataset.
    - Set the cell size
    - Set the pixel type
    - Set the # of bands.
    - Set the Spatial Reference.

    Warning:
    The menu lists these as 'optional', but if they are not specified here it defaults to something that may not work for the data, especially pixel type and # of bands. This could cause an error like: "Inputs parameter not raster layer".

  3. Right-click the new raster dataset in the connection and select Load > Load Data.
  4. Select all of the input rasters and other options.

    The options specified depend upon the rasters to be loaded.

    - The Mosaic Method is how the overlapping cell values are determined.
    - Mosaic Colormap Mode only applies to colormapped (pseudocolor) images and how to combine the colormaps.
    - Ignore Background value removes one background (border) value for the input rasters.
    - The NoData Value converts any pixels with the specified value to NoData.
    - The Convert 1-bit to 8-bit checkbox allows monochrome (0's and 1's) and converts to an 8-bit range (0's and 255's) as these render better.
    - Mosaic Pixel Tolerance controls pixel re-sampling. If the offset between rasters is less than the tolerance, no resampling is done and a shift is performed.
  5. Right-click the raster dataset and select Analyze.