Adding orthorectified raster types
The Orthorectification raster type includes data that has associated files for use in orthorectifying the raster data. When orthorectifying raster data, a 3D transformation is applied in which the data is corrected for terrain displacements by the use of a terrain model. When you add raster data with this raster type, the Ortho process is added to the raster process chain.
Learn more about the Ortho process
The Orthorectification raster type can be divided into two groups based on the data collection mechanism: aerial imagery or satellite imagery. When adding most other raster types, you can point to a specific file or folder containing the data you want to add. This is not always the case with the Orthorectification raster type. For some raster types, mainly the aerial imagery, you define several specific files, such as a project file or camera file. Once you define these file or folder locations, a dialog box appears containing two or three tabs on which you can edit or define parameters. Each of these tabs contains the parameters specific to the raster type you are adding, except the Enhancement tab. This tab is the same for all raster types.
Learn about applying an enhancement to data added to an image service definition
Other parameters common to this raster type are those specific to orthorectification. These parameters are presented on either the General or Orthorectification parameters tab. To learn about most of these parameters, see Using the Ortho process. There are some differences for some of these raster types. For example, some tabs allow you to define the spatial reference system of the dataset. This is because this information is not typically defined within the dataset itself. Additionally, for the aerial imagery raster types, you can define the percentage of image you want to clip from the input data, mainly to remove fiducial marks and severely distorted data from along the edges.
The majority of the raster types for adding aerial imagery are from aerial triangulation software packages; however, at least one raster type defined in ArcGIS Image Server reads the data collected directly from a camera. This data is from the Applanix DSS camera, which is a medium-format, digital, airborne, remote-sensing system that uses integrated inertial technology. This raster type has a Camera Definition parameters tab. To learn about these parameters and how to add this raster type, see Creating an image service using Applanix DSS Airborne Sensor data.
Satellite imagery datasets tend to have multiple bands with various spatial resolutions. For example, such bands are often collected at different spectral resolutions that, when combined, create a color image; and a single band collected at a higher resolution has a panchromatic image. Each of these raster types has a tab, either General Parameters or Pansharpen, which allows you to define the band combination for a color (multispectral) display, panchromatic image, or pan-sharpened image.
Learn about using the Pan-sharpen process