Target spectra

A target spectra is comprised of an unstructured vector layer (containing points, lines, or polygons), a spectra-signature line (plotted in the graph area), and a record in the table on the Target tab.

The table shows the target-spectra signatures available for viewing in the graph and, if they exist, their associated and unstructured vector shapes. The table identifies the plot, name, gain, bias, R2, and color. Beneath the table, you can select new samples, import shapes, remove target-spectra records, and export target spectra.

Plot

Show or hide a signature-plot line in the graph.

Name

Lists the names of each spectra.

Gain

When linked to a reference spectra, shows the derived gain across all bands.

Bias

When linked to a reference spectra, shows the derived bias across all bands.

When linked to a reference spectra, shows the derived determination coefficient across all bands.

Color

Lists the plot-line colors for each spectra signature in the table. If necessary, you can change the color of a spectra-plot line in the graph.

New

Creates a new entry in the Target table and, on the Maps tab, creates a new unstructured vector layer.

Import Shapes

Copies vector shapes from a vector file to the unstructured target layer on the Maps tab and updates the statistics for the spectra signature in the Target table.

Import Spectra and Shapes

Imports a spectra and vector saved previously to the Target table and target layer on the Maps tab. Populates the Target table with the spectra saved in the vector file, updates the spectra based on the image reflectance and signatures.

Delete

Removes the spectra signature from the Target table, removes any associated vector shapes on the Maps tab, and updates the regression statistics.

Export to Spectra Library

Exports the spectra signatures to a spectra-library file. For more information about exporting spectra signatures, see Exporting spectra.