To create a new Mosaic job, you can do one of four things:
Right-click in the Project Manager and select Create New Job>Transformer > Mosaic
Click the Create a new mosaic button .
Right click on an existing Batch Raster Transform and select Generate Mosaic Job. In this case, the output files from the Batch will be used as input layers for the Mosaic Job.
The first step is to add some input layers to the Mosaic Job, using the Mosaic Image List. When you click the Add button, a new dialog will be popped up that will allow you to select files. The input files may be any raster format supported by the Geographic Calculator, but they must all be referenced against the same coordinate system. Files may also be added to the job by dragging and dropping items from the Data Corral onto the Mosaic Image List.
Next, switch to the Mosaic Settings Tab. Check the coordinate system to make sure that it matches the coordinate system used by the input layers. The Mosaic Job will attempt to set this for you when the layers are added, but it will not always be able to determine the coordinate system from the reference information.
Set up the output settings for the composite image, including the path where the composite image should be saved, the desired resolution for the output image, the central latitude, and any additional Raster Processing Preferences.
If you wish to crop any of the input images, switch to the Mosaic Input Image Preview Tab, and select the desired image in the Mosaic Image List. Cropping the input images will prevent areas of the input image from being added to the composite image, which can be helpful if the input images have borders or legends or other areas that would detract from the composite image. By default, each of the input images will have a crop area that encloses the whole image, which effectively does not crop the image. Each image will have to be visited individually if you wish to perform a custom crop.
Next, switch to the Mosaic Output Preview Tab to see an approximation of what the composite image will look like. This is a good opportunity to use the Mosaic Image List to adjust the z-order (draw order) of the input layers. The z-order indicates which input layers are drawn on top of other layers. The image at the top of the Mosaic Image List will be drawn on top of all others, and the z-order decreases as you move down the Mosaic Image List. As the z-order of layers is changed, the Output Preview Viewer will be updated to show the new order.
Once you are satisfied with all of the settings for the Mosaic Job, save the Mosaic Job by clicking File>Save>Job. Then click the Process button at the bottom of the Mosaic Image List control to begin processing the Mosaic Job.