cnet2dem

The cnet2dem applicaton produces an interpolated digital elevation model (DEM) from one or more control networks. There are fourteen different algorithms that may be selected that provide either absolute radius values or other information, such as radius and point distance statistics, computed at each output DEM pixel value. The range and type of the DEM generated from cnet2dem is a standard ISIS map definition or a projected ISIS cube file containing a map definition. You can select any number of algorithms in the ALGORITHM parameter. The output cube will contain the same number of bands in the same order algorithms are specified in the parameter. The BandBin group Name parameter will also contain the name of the algorithm that cooresponds to the data contained in each band.

Note that the control network is expected to be the output results of the bundle adjustment computed by jigsaw. Additionally, jigsaw must have been used to solve for radius. Otherwise, you will be using the apriori radius which is typically the PCK defininition (will will result in the ellipsoid).

The adjusted latitude/longitude coordinate is used to compute the location of all the control points. The adjusted coordinates are compute by jigsaw. If it doesn't exist, the apriori coordinate will be used but know that this coordinate is typically computed from each reference image in each control point (so it may not be consistent).

Also, in some cases, one or more of the algorithm radius bands in the output of cnet2dem may be sufficient for direct use as an ISIS shape model (after demprep is run!). However, this is generally not the case and some of the radius bands may require a series of filters to smooth out the results.