Mosaic

Mosaic Operator

The Mosaic Operator combines overlapping products into a single composite product.  The mosaicking is achieved based on the geocoding of the source products therefore the geocoding needs to be very accurate. It is recommended that the source products be Terrain Corrected and Radiometric Corrected first.

The following parameters are used by the Operator:

1. Source Bands: All bands (real or virtual) of the source product. You may select one or more bands. If no bands are selected, then by default all bands will be processed.
2. Resampling Method: Choice of Nearest Neighbour, Bilinear, Cubic, Bi-Sinc or Bi-Cubic resampling.
3. Pixel Size (m): The output scene pixel spacing in meters.
   
4. Scene Width (pixels): The output scene width in pixels.
5. Scene Height (pixels): The output scene height in pixels.
6. Feather (pixels): The number of pixels skipped on the boundary of the source images.
   
7. Weight Average of Overlap: Averaging option to blend overlapping pixels. To achieve better mosaic result, the Normalizer checkbox below should be selected as well.
   
8. Normalizer: Normalization option to remove mean and normalize standard deviation. 

Below is an example of a mosaic of ASA_GM1 products that have been Terrain Corrected and Radiometric Corrected. Overlapping areas have been normalized and averaged.