MultiSpec specifications

General

The gdal library was updated from version 1.7.3 to 1.9.0.

File - Open Image

The gdal libraries are now used to handle Imagine formatted images. Therefore MultiSpec can now handle compressed Imagine images.

MultiSpec can now handle the hdf5 format. This has been tested with GOSAT and VIIRS images. MultiSpec will also handle BAG (Bathymetry Attributed Grid) images. MultiSpec will interpret the metadata in the GOSAT images to set the map projection. One selects the dataset to be used from a popup menu in the file format specification dialog box like is done for files in hdf4 and netcdf format. The datasets are automatically grouped if they are in order, have similar dataset names (first 4 characters) and the same line/column/data type specs. One can also use the Processor->Utilities->List Image Description to get a listing of the metadata in the hdf5 files. Let me know if you run into problems handling hdf5 images; I am sure there are many variations. The hdf5 library version being used is 1.8.8. The gdal library is used as the interface between the hdf5 library and MultiSpec.

One item to note is that adding the hdf5 feature into MultiSpec increased the size of the application by more than 60%.

Edit->Image Map Parameters

Additional changes were made in the "Set Map Coordinate Specifications" dialog box. An option was added to define the reference coordinate system by the EPSG number. Several thousand reference systems have EPSG codes. When one sets the EPSG number, the parameters for the reference system are shown but they are not editable. As before, if one changes the reference system menu to User Defined, one can change the parameters. To make this all work, it is important to keep the epsg_csv folder with the MultiSpec application on Windows systems. This folder is part of the MultiSpec application package on Macintosh systems so if one moves the application, this folder (not seen) goes with it automatically.

The US Survey Feet units are now being handled consistantly.