This class contains meta information for surface-based data (the values that map to a surface geometry)
Slots
header_filename of the file containing meta information
data_filename of the file containing data
file_descriptordescriptor of image file format
node_countthe number of nodes for which surface data exists
nelsthe number of data vectors (typically the number of columns in the surface data matrix; nels = 1 for a single surface data set)
labela label indicating the type of surface (e.g. white, pial, inflated, flat, spherical)