Glue raster maps

Dialog box

The Glue raster maps operation glues or merges two or more georeferenced input raster maps into one output raster map. The output map then comprises the total area of all input maps. The domains of the input maps are merged when needed. With the Glue raster maps operation, you can thus merge two or more adjacent or partly overlapping raster maps (i.e. make a mosaic) or glue smaller raster maps onto a larger one.

Dialog box options:

Number of input maps:

Select the number of raster maps that you want to glue or merge together (2, 3, or 4). In the dialog box, the number of input raster maps is limited to four. On the command line, this limitation is not present.

First input map:

Select the first input raster map. Open the list box and select the desired input map, or drag a raster map directly from the Catalog into this box.

Second input map:

Select the second input raster map.

Third input map:

Optionally, select a third input raster map.

Fourth input map:

Optionally, select a fourth input raster map.

You can always glue raster maps of the same domain type. For more information on mergeable domain types, see Glue raster maps : functionality.

Last map on top:

Select this check box when for overlapping pixels the values, class names, IDs, or colors of the last map should be used. Then, for overlapping pixels, the values of the last map will appear on top of the other maps; undefined values in the last map will act as openings for the map under it, etc.

Clear this check box when for overlapping pixels, the pixels of the first map should be used.

New domain:

Only when merging Class or ID maps that do not use the same domain: select this box if you want to store the output domain as a separate object (recommended). Subsequently, type a name for the new domain. Clear this check box to obtain an output Class or ID domain which is stored by the output map (internal domain).

Georeference:

Select this check box if you wish to select an existing georeference for the output raster map, or when you wish to create a new georeference for the output raster map.

  • Select an existing georeference from the drop-down list, or
  • create a new georeference corners by clicking the create button.

Clear this check box to let the program automatically create a new georeference in which all input raster maps fit. In this case, the first input map will determine the pixel size of the georeference.

Output raster map:

Type a name for the output raster map that will contain all input maps.

Description:

Optionally, type a description for the output map. The description will appear in the status bar of the Main window when moving the mouse pointer over the map in a Catalog, and in the title bar of a map window when the output map is displayed. If no description is supplied, the output map will use its own definition as description.

When you click the Show button, the dependent output map will be defined, calculated and shown. When you click the Define button, the dependent output map will only be defined; if necessary the map will be calculated later, for instance when the map is opened to be displayed.

Furthermore, if no existing georeference is specified or when no new georeference is created, a new georeference may be automatically created for the output map (same name as output map), and if specified, also a new domain is created.

See also: