[Vis5d-users] topography

Hi,

I am trying to use a topography file TOPOSA.TOPO which represents most
parts of Chile at a resolution of 30 sec. When looking at it using the
"topoinfo" command, I get the following message:

Topo file: TOPOSA.TOPO
North bound: -18 deg
South bound: -46 deg
West bound: -75 deg
East bound: -67 deg
Rows: 3361
Columns: 961
min height: 0 meters
max height: 6795 meters
% water flags: 38

To me it seems that its format is alright. However, when using it,
displaying my data I only get a white/gray surface without any
topography.
Using  the v5dinfo command for my data I get the following message:

File format: v5d  version: 4.3
Compression:  1 byte per gridpoint.
header size=11460
sizeof(v5dstruct)=334068

NumVars = 3
Var  Name       Units      Rows  Cols  Levels LowLev  MinVal
MaxVal
  1  no                     83    62    37      0     1.40594e-16
0.00611699
  2  o3                     83    62    37      0     1e-16
2.12291
  3  co                     83    62    37      0     1.01636e-16
9.71855

NumTimes = 5
Step    Date(YYDDD)    Time(HH:MM:SS)   Day
  1        97001           0:00:00     Wednesday
  2        97002           0:00:00     Thursday
  3        97003           0:00:00     Friday
  4        97004           0:00:00     Saturday
  5        97005           0:00:00     Sunday

Unequally spaced levels in km:
Level   Height(km)
  1          0.086
  2          0.268
  3          0.455
  4          0.647
  5          0.845
  6          1.047
  7          1.256
  8          1.471
  9          1.693
 10          1.921
 11          2.157
 12          2.401
 13          2.654
 14          2.916
 15          3.187
 16          3.470
 17          3.763
 18          4.070
 19          4.390
 20          4.725
 21          5.076
 22          5.445
 23          5.834
 24          6.246
 25          6.682
 26          7.147
 27          7.643
 28          8.177
 29          8.753
 30          9.379
 31         10.065
 32         10.823
 33         11.671
 34         12.631
 35         13.740
 36         15.052
 37         16.657

Cylindrical Equidistant projection:
        North Boundary: -32.871208 degrees
        West Boundary: -71.311600 degrees
        Row Increment: 0.014900 degrees
        Column Increment: 0.018000 degrees

Any idea why I can't display my topography?

Thanks,

Rainer

--
Rainer Schmitz
Department of Geophysics
University of Chile
phone # (56)(2)678 4592
fax   # (56)(2)696 8686