[gdal-dev] gdal_grid help

[Jeff Lake]

ugh..
I have been attempting to create an interpolated (IDW) raster from CSV, 
to no avail all I get is either a totally black tiff or white tiff
here is the command line I have been trying

gdal_grid -a invdist:power=2.0:smoothing=1.0 -outsize 800 600 -ot 
Float64 -l temps temps.vrt temps.tiff

and the CSV http://metar.michiganwxsystem.net/temps.csv

here is the vrt

<OGRVRTDataSource>
     <OGRVRTLayer name="temps">
<SrcDataSource>/var/www/html/metar/temps.csv</SrcDataSource>
         <GeometryType>wkbPoint</GeometryType>
<GeometryField encoding="PointFromColumns" x="Longitude" y="Latitude"/>
  <LayerSRS>WGS84</LayerSRS>
     </OGRVRTLayer>
</OGRVRTDataSource>


anybody gather where I'm going wrong ??

-- 
-Jeff Lake
MichiganWxSystem.com
AllisonHouse.com
TheWeatherCenter.net
GRLevelXStuff.com