WHAT ARE THE TYPES / LEVELS OF IMAGE PROCESSING?
Imagery data can be raw, standard, geo-rectified or ortho-rectified. The data from the NGA CSIL is considered raw/standard level data. The TIO may have similarly processed data but unlike the NGA CSIL also holds/disseminates imagery at all levels of processing because all customers have various levels needed for their efforts. -STANDARD- Standard Imagery has a coarse DEM applied to it, which is used to normalize for topographic relief with respect to the reference ellipsoid. The degree of normalized is relatively small, so while this product has terrain corrections, it is not considered ortho-rectified. It has an average absolute geo-location accuracy of 23 meter CE90%, excluding any topographic displacement and off-nadir viewing angle. Ground Control Points (GCPs). – GEO-RECTIFIED- the photo-grammetric adjustment of one or more images relative to each other and to an absolute (fixed) ground reference system.
Imagery data can be raw, standard, geo-rectified or ortho-rectified. The data from the NGA CSIL is considered raw/standard level data. The TIO may have similarly processed data but unlike the NGA CSIL also holds/disseminates imagery at all levels of processing because all customers have various levels needed for their efforts. -STANDARD- Standard Imagery has a coarse DEM applied to it, which is used to normalize for topographic relief with respect to the reference ellipsoid. The degree of normalized is relatively small, so while this product has terrain corrections, it is not considered ortho-rectified. It has an average absolute geo-location accuracy of 23 meter CE90%, excluding any topographic displacement and off-nadir viewing angle. Ground Control Points (GCPs). – GEO-RECTIFIED- the photo-grammetric adjustment of one or more images relative to each other and to an absolute (fixed) ground reference system. An image or vector layer that is geo-rectified is tied to a geographic refere
