The eccentricity of hair cross-sectional shape index is also calculated using the thickest and thinnest axial diameters of human hair, and this index also differs by race.
2.
Using this index, it is possible to seek backwards in the shapefile by, first, seeking backwards in the shape index ( which is possible because it uses fixed-length records ), then reading the record offset, and using that offset to seek to the correct position in the . shp file.