Carl Tape, 22-Sept-2006
GPS data files for southern California
----------------------------------------

-------------------
actual velocity fields (socal_gps_dat.m)
See http://epicenter.usc.edu/cmm3/tableform.html
-------------------

vels.final                  SCEC Crustal Motion Map, v3.0 
   --> http://epicenter.usc.edu/cmm3/vels.final
socal_gps_SCEC_3p0.dat      SCEC Crustal Motion Map, v3.0 
   --> added -- in final column where it was blank

vs_final.map                SCEC Crustal Motion Map, v4.0 (preliminary)
   --> vs_final.map from Duncan Agnew on 28-Aug-2006
socal_gps_SCEC_4p0_v0.dat   SCEC Crustal Motion Map, v4.0 (preliminary)
   --> added 00 in col 13 where it was blank

Here's how we got the files for processing CMM 4.0
1.  Start with socal_gps_SCEC_4p0_v0.dat
2.  Determine redundant points in socal_gps_dat.m -- socal_gps_SCEC_4p0_v0_mod.dat
3.  Comment out redundant points in socal_gps_SCEC_4p0_v0.dat --> socal_gps_SCEC_4p0_v0_mod.dat
4.  Delete redundant points in socal_gps_SCEC_4p0_v0_mod.dat --> socal_gps_SCEC_4p0_v1.dat
5.  Run socal_gps_dat.m with irun=1 and iv4=4 to exclude pts outside region --> socal_vfield_4p0_3D.dat

Format of socal_vfield_4p0_3D.dat:
 1. lon
 2. lat
 3. ve, mm/yr
 4. vn, mm/yr
 5. vu, mm/yr
 6. Se
 7. Sn
 8. Su
 9. Ren
10. Reu
11. Rnu
12. tstart, yr
13. tend, yr
14. tdur, yr
15. name

Here's how to read the file in in Matlab:
[dlon,dlat,ve,vn,vu,se,sn,su,ren,reu,rnu,tstart,tend,tdur,name] = ...
    textread('socal_vfield_4p0_3D.dat','%f%f%f%f%f%f%f%f%f%f%f%f%f%f%s');