CAST GeoSpatial Methods &amp Visualization 

Abstract: On-the-fly and Permanent Orthorectification of NITF Images in ArcMap About NITF files The NITF (National Imagery Transmission Format Standard) format is commonly used for georeferenced imagery and has the ability to store a large amount of ancillary data and metadata along with the image itself, all in one file. One of the more useful pieces of ancillary data optionally stored within an NITF file is known as RPCs (Rapid Polynomial Coefficients). With the use of RPCs and elevation data for the area, complete orthorectification is possible. For example data, see CAST’s “Corona Atlas of the Middle East” and choose from the large number of NITF files available for download. Viewing and creating NITF orthoimage in ArcMap Written for ArcMap 10 1. Open ArcMap and add one or more NITF image files. 2. Add a DEM covering the area. 3. Right-click the image name in the Table of