  Using data from the Sloan Digital Sky Survey Early Data Release and
SuperCOSMOS Sky Survey scans of POSS-I plates we identify a sample of 2600
subdwarfs using reduced proper motion methods and strict selection criteria.
This forms one of the largest and most reliable samples of candidate subdwarfs
known, and enables us to determine accurate luminosity functions along many
different lines of sight. We derive the subdwarf luminosity function with
unprecedented accuracy to M_V <= 12.5, finding good agreement with recent local
estimates but discrepancy with results for the more distant spheroid. This
provides further evidence that the inner and outer parts of the stellar halo
cannot be described by a single density distribution. We also find that the
form of the inner spheroid density profile within heliocentric distances of 2.5
kpc is closely matched by a power law with an index of -3.15 +/- 0.3.
