[Shake-dev] where to get shakemap DEM grid data??

[wsk]

hi list

I've successed build shakmap v3.5 on freebsd 9.1 with Mr Worden's user
guide and with appreciated.
and no i have a problem while i test it:
so, where to get the DEM grid data and how to use it?
BTW
and i googled SRTM30 and found on
http://dds.cr.usgs.gov/srtm/version2_1/SRTM30/
but it's a zip file without dem2grid file and have no ideas how to use it.

shakemap# /usr/local/shakemap/bin/shake -event 9583161
2012-01-08 07:15:14 : transfer: ----- Starting Transfer at 01/08/2012
07:15:14 -----
2012-01-08 07:15:14 : transfer: ----- Transfer finished at 01/08/2012
07:15:14 -----
2012-01-08 07:15:14 : grind: WARNING: You have specified an incorrect
ampfactor_file in
2012-01-08 07:15:14 : grind: WARNING: grind.conf.
2012-01-08 07:15:14 : grind: WARNING: Continuing using default
Borcherdt94.dat table.
Quitting topo2grd. at /usr/local/shakemap/bin/../bin/topo2grd line 233.
/usr/local/shakemap/bin/../bin/topo2grd 9583161
-120.150000/-117.650000/33.813000/35.313000 0.025/0.025 regime=active
Using . Final resolution fixed at 0.025.
c
DEM grid file: /DATA/w180n40.grd NOT FOUND. Why?
DEM grid file: /DATA/w180s10.grd NOT FOUND. Why?
DEM grid file: /DATA/w140n90.grd NOT FOUND. Why?
DEM grid file: /DATA/w140n40.grd NOT FOUND. Why?
DEM grid file: /DATA/w140s10.grd NOT FOUND. Why?
DEM grid file: /DATA/w100n90.grd NOT FOUND. Why?
DEM grid file: /DATA/w100n40.grd NOT FOUND. Why?
DEM grid file: /DATA/w100s10.grd NOT FOUND. Why?
DEM grid file: /DATA/w060n90.grd NOT FOUND. Why?
DEM grid file: /DATA/w060n40.grd NOT FOUND. Why?
DEM grid file: /DATA/w060s10.grd NOT FOUND. Why?
DEM grid file: /DATA/w020n90.grd NOT FOUND. Why?
DEM grid file: /DATA/w020n40.grd NOT FOUND. Why?
DEM grid file: /DATA/w020s10.grd NOT FOUND. Why?
DEM grid file: /DATA/e020n90.grd NOT FOUND. Why?
DEM grid file: /DATA/e020n40.grd NOT FOUND. Why?
DEM grid file: /DATA/e020s10.grd NOT FOUND. Why?
DEM grid file: /DATA/e060n90.grd NOT FOUND. Why?
DEM grid file: /DATA/e060n40.grd NOT FOUND. Why?
DEM grid file: /DATA/e060s10.grd NOT FOUND. Why?
DEM grid file: /DATA/e100n90.grd NOT FOUND. Why?
DEM grid file: /DATA/e100n40.grd NOT FOUND. Why?
DEM grid file: /DATA/e100s10.grd NOT FOUND. Why?
DEM grid file: /DATA/e140n90.grd NOT FOUND. Why?
DEM grid file: /DATA/e140n40.grd NOT FOUND. Why?
DEM grid file: /DATA/e140s10.grd NOT FOUND. Why?
Error in topo2grd: Nothing extracted.
Set $VERBOSE = 1 and examine the output.
It is likely you have something misconfigured in your DEM data.
grind: Error: Error in topo/sitecorr map creation, exiting.
shake: Error in grind: 256