The following list defines all the keywords which are used to store the spectral collection.
||The x-coordinate of the spectrum (in pixels)
||The y-coordinate of the spectrum (in pixels)
||The time-coordinate of the spectrum. The parameter tslot specified the index of the time slot.
||The type of the spectral data. This parameter param may assume one of the following values:
||the spectrum represents a single pixel
||the spectrum is the mean spectrum of a circular area, the center of the circle is given by #iscPosX and #iscPosY, its center by #iscRadius
||the spectrum is the mean spectrum of a polygonal area. The first vertex of the polygon is given by #iscPosX and #iscPosY, the remaining vertices are stored as difference coordinates in the keyword #iscBoundary.
||the spectrum has been imported as a reference spectrum.
||The specification of a closed boundary line which is given by cnt+1 vertices. The polygonal boundary line is defined by the starting point given by #iscPosX and #iscPosY and cnt edge vectors which are stored line by line after this keyword. The edge vectors are defined by relative coordinates (dx, dy) which are calculated by subtracting the starting position of an edge from its endpoint. The dx and dy values are separated by a blank.
||The class number of the spectrum. The parameter cl may take values between 0 and 255.
||The wavelength calibration of the spectra. If this keyword is undefined or the parameter NCalLines is zero, the calibration is taken from the metadata of the associated data file. The calibration is valid for all spectra of the spectral collection. The parameter NCalLines defines the number of calibration sets following the keyword. As spectral data may consist of several different types of spectra, the calibration parameters may consist of several calibration sets. Each set is stored in a single line and consists of the following parameters (separated by blanks):
- range of the calibration set (first and last index)
- spectral group number
- type of the spectrum(1)
- the order of the derivative (normally zero, non-zero only if a derived spectrum is stored)
- reverse flag
- calibration coefficients a0 to a6 of the centered calibration polynomial
- scaling factor(2)
- shift parameter of the centered polynomial
- coefficients a0 to a6 of the centered inverse calibration polynomial
- inverse scaling factor(2)
- shift parameter of the centered inverse polynomial
||The caption of the spectrum
||The user-defined categories assigned to the spectrum. Categories are defined using the syntax '<catix=value>'. The number of specified categories per spectrum can be from zero to the maximum of 20. The category index catix can assume any number between 1 and 20, the value parameter is a string defining the value of the particular category. Categories for spectral collections can be defined individually for each spectral collection. The default categories are defined in the system-wide settings.
||The color of the spectrum as a hexadecimal RGB value. Please note that the color of a spectrum may be replaced by the corresponding class color (depending on the window which displays the spectrum)
||Defines the radius of the circular area in the case of #iscCItemType is ciCircArea.
||The spectral data of the collection item. The keyword is followed by the number of layers. The following nlayer lines contain the spectral intensities and their standard deviation (if iscVersion is > 1). If the spectrum is not a mean spectrum the standard deviation is indicated by zero values.
||The number of spectra in the collection
||The index of the spectrum. Please note that the index of the spectrum may vary when the spectral collection is edited. A permanent and unique identifier is provided by the item ID (keyword iscItemID).
||A unique item identifier (integer number between 1 and 231-1)
||Signals the end of the data of a collection item.
||The version number of the data format.
||The filename (full path) of the associated data cube. Unlesss the calibration is specified by the keyword iscCalib the filename of the dataset is used to extract the wavelength calibration from the corresponding metadata definition.
||The definition of the categories. This keyword is followed by numcats lines, each defining a particular category. The individual categories are specified using the format cat=identifier|type|comment|preset|sorted, with cat being the category number (1..20). The various specifications are separated by pipe symbols and are defined as follows:
||The name of the category. This identifier is displayed in the header of the spectral collection table and can be used to search for specific categories.
||The type of the category. Supported types are: integer, double, string, hexint, boolean. Please note that categories are always stored as strings disregarding the particular type. However, the type specifier controls the user interface when editing a category.
||The comment is displayed as a hint when editing the categories of a spectral entry.
||Defines often used values. The preset values have to be separated by semicolons.
||Determines whether preset values are displayed in sorted order.
||The definition of the class names. This keyword is followed by numclasses lines, each defining the name of a particular class. The individual class names are specified using the format cls=caption, with cls being the class number (0..255) and caption being the class name.
||The definition of the status flag names. This keyword is followed by numflags lines, each defining a particular flag. The individual flags are specified using the format flg=caption, with flg being the flag number (0..15) and caption being the flag name.
||The 16 status flags encoded as a 16bit hexadecimal integer (0000...FFFF)
||The date and time when the spectrum has been added to the collection (format yyyy-MM-dd HH:mm:ss)