problem generating scenery

Hi


I'm trying to build scenery but i'm having problem with elevation data :
the generated terrain end up being wrong with huge polygons pointing
toward the sky and trees in the sky :)


I'm not too much interested in the detail of the terrain or vmap data
itself but in generating the airport, as I much add detail to a specific
airport for a work project.

I'd like too know if terragear CVS current is fully compatible with the
released FlightGear 0.9.3 or if terrain generated with Terragear CVS
need FlightGear CVS. For my experiment I compiled Terragear CVS from
around 1st December 2003 and for testing I used Flightgear 0.9.3 (Should
I ugrade to current Terragear CVS ?).


I followed quite closely and adapted the html tutorial, using the europe
DEM-30 and VMAP0 data. 


here's what I did:

$ for file in data/dem30/ascii/*.dem; do
> demchop $file work/DEM-30
> done


I read some things on the mailing list about hgtchop. Do i need to use it or is only for 1 and 3 arcsec DEMs ?



$genapts --input=default.apt.gz --work=../../work/ --min-lon=1 --max-lon=2 --min-lat=43 --max-lat=44 

(default.apt.gz is from FG 0.9.3 data)


I generated just the landMass (is that sufficient for correct terrain ?):

$tgvpf  --min-lon=1 --max-lon=2 --min-lat=43 --max-lat=44 <path to vmaplv0> eurnasia bnd polbnda

a question about tgvpf usage: what --min-area and --max-area do ?
The tutorial has an obsolete argument --area. Is that not needed anymore ?


then I launched fgfs-tool-server and client like this:

$fgfs-tools-client --rude --output-dir=. --work-dir=. --port=<num> DEM-30 LandMass AirportArea AirportObj



And the terrain is totally psychedelic around LFBO :(



I did the above procedure without generating the airports but the elevation is sill wrong. What did I miss ?