Data providers and government agencies provide many types of rasters including orthophotos and DEM files, many of which are available without charge. Often, these rasters are tiled and must be merged to generate a single and seamless coverage area. Using Geographic Imager, you can mosaic images to create a single composite spatial image.
The Mosaic feature creates a single composite georeferenced image from multiple input georeferenced images, including DEM files. Available documents for the mosaic process are allowed to have different properties such as coordinate system, pixel size and rotation angle. These documents are transformed to match the properties of the destination document. Advanced transformation options may be used when performing a mosaic that requires a coordinate system transformation, resampling to match pixel size or rectify a rotation.
Mosaicking four images together, where the destination document has a projected coordinate system. The result is a mosaic that has a projected coordinate system of the destination document.
Transformations during mosaic are not supported when the destination document contains a rotation angle. To mosaic into a destination document containing rotation the available documents to be mosaicked must have the same coordinate system, pixel size and rotation angle.