yes? let lon_mask = IF lon GT 100 AND lon LT 180 then 1 ELSE 0Then issue your polymark command with the variables lon_subset and lat_subset.
yes? let lon_subset = lon_mask * lonyes? let lat_mask = IF lat GT 10 AND lat LT 50 then 1 ELSE 0
yes? let lat_subset = lat_mask * lat
Or, overlay your polygon on a base map confined to the region you want.
Type "go/help basemap" to see all the arguments. You could
also overlay
on any 2-d Ferret plot, of topology for example.
yes? go basemap x=100:180 y=10:50Richard Dixon wrote:
yes? go polymark polygon/over/key lon, lat, windspeed, circle
Dear Ferret-UsersThanks to all who gave me some advice on plotting scattered data, polymark
seems like a good idea for me.However - I'm having trouble using the polymark routine - I'm plotting out
the data which is just: 3 single-dimension arrays of lat, long and wind
speed. I was wondering whether I could specify the edges of the domain
which I would like to plot.At present, it only plots the map over the region of the extremes of
latitude and longitude. Is there any way I can specify over which lat/lon
region I can carry out the plot without being restrained to the array data
extremes?Many thanks
Richard
--
Ansley Manke Pacific Marine Environmental Laboratory Seattle
WA (206)526-6246