Preprocessing requirements

Before running this module, the following requirements must be met to ensure the job processes successfully and produces accurate results:

• Input satellite scenes: the imagery on which to collect tie points (TP) must contain a valid math-model segment. The segment can be the nominal one, as imported with the raw data during the ingest stage. In this case, the output folder of the Data Ingest module can be specified for the Input Scenes parameter. Alternatively, the input scenes can contain refined math models as a result of GCP collection. In this case, the output folder of the GCP Collection module can be specified for the Input Scenes parameter.

  The overlapping images to be processed must have identical math-model types, including projection and datum. If input images have UTM projections, for a large area across UTM zones, it is recommended that you reproject the images to Long/Lat before running the module. It is also recommended that you process all imagery specified as input to this module with the Data Ingest and GCP Collection module.

• Input aerial scenes: the folder specified for tie-point collection must contain a valid CATALYST Professional OrthoEngine project file. A valid project file contains all the aerial scenes, exterior orientation (EO), camera model, and map units. The input scenes can be the output folder of the Airphoto Ingest for AT module when it contains an OrthoEngine project file. Alternatively, the input scenes can be the output folder of the GCP Collection module.