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Re: trajectories-on-a-map plot



Hi Michael,
I don't see anything wrong with your commands.  Defining an axis
as you are doing is the right thing to do for  a long file.  Do you
perhaps have a region set in X?  Try just the grid set-up and read
and SHOW DATA in a fresh Ferret session.

Ansley Manke

Michael Traub wrote:

Dear Ferreters!

I would like to plot trajectories (lon,lat,press) - with the pressure height being colored - onto a map.
The file is very long with more than 50000 lines (see below)

name title I J K L
LON LON 1:50784 ... ... ...
LAT LAT 1:50784 ... ... ...
PRESS PRESS 1:50784 ... ... ...


If I start my script

#############################################
go basemap X=110w:20e Y=20:75 20

define axis/x=1:"50784":1 xax

define grid/x=xax goon file/column=3/var="lon,lat,press"/grid=goon CET_ATTILA_T106L19

GO polymark POLY/OVER/KEY/LEVELS="(200,1000,100)"/nolab lon+360 lat press/100. circle 0.2
############################################

it runs, but not all lon, lat and press values are plotted onto the map. If I type "show data",
the data looks like that:

name title I J K L
LON LON 1:1104 ... ... ...
LAT LAT 1:1104 ... ... ...
PRESS PRESS 1:1104 ... ... ...

What has happened????? How can I plot all values onto the map???

Greetings

Michael





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