Mosaic

The mosaic operation is used to create a mosaic from a set of rasters. Image mosaic refers to those multi images, which are shot in the same or different shooting condition and have overlapped regions, that are stitched and combined to an image to enlarge the field of vision that an image can cover. The available method in TerraAmazon are:

Geo Mosaic: Create a mosaic from a set of geo-referenced rasters.

Tie Points Mosaic: Create a mosaic from a set of rasters using tie-points over each adjacent rasters pair.

Sequence Mosaic: Create mosaics from a sequence of overlapped rasters using an automatic tie-points detection method.

Select PROCESSING → RASTER PROCESSING → MOSAIC in the main menu.


On the List of Layers select the raster layers to apply the mosaic.

Optionally use Filter By Name field giving part of the layer name to help find the layer in the list.

Press the Next button to go to next step or the Cancel button to close the dialog.


Mosaic parameters

Select the type of mosaic to be used and set their specific parameters:

Geo Mosaic

Tie Points Mosaic:

Layer A

Layer B

Geometric transformation

Tie Points Link Type

Note: Use the tool to show the interface for the acquisition of tie points. This interface is the same used in the register operation.

Sequence Mosaic

Geometric Transformation

Reference Band: The band used to locate tie-points.

Minimum Required Tie Points: The minimum required tie-points covered area percent of each raster area - valid range [0,100] (default : 0).

Tie Point Locator Parameters: This interface is the same used in the register operation.

The common parameters are:

Interpolator: The raster interpolator method.

Blender: The pixel blending method.

No Data:

Force Input Value: If checked, no data value will be used as the no-data value for input rasters.

Value: The pixel value used where no raster data is available (default : 0).

Options

Auto Equalize: Auto equalization will be performed using the overlapped image areas.

Use Raster Cache

Press the Next button.


Output information

Raster Info - First press and inform the folder where the resulting file will be saved.

Name - inform the raster name.

Extra Parameters - if there are some.

Press the Finish button to save the resulting mosaic raster.

Note: When importing an image to the database, remember to setup dummy value to zero, to avoid border to be showed in the image.