Making a vertical section plot using CTDFGRID
Variable to Grid
Variables are entered as generic names or as eps# (e.g. eps20)
Sample variables available are:
Alternatively choose a variable from the list. (The list is taken
from the first data file which might not include the desired variable.)
Select the type of horizontal axis:
P = Profile (axis is consecutive sequence number)
A = Distance Along ship track (axis is kilometers)
Z = Zonal (E-W) projection (axis is longitude)
M = Meridional (N-S) projection (axis is latitude)
L = Least-squares fit to ship track
CTDFGRID grids profile data to a regular 2-D grid. Specify the
number of nodes in horizontal and vertical direction. (Vertical
axis is always pressure/depth for profile type data.)
Depth Axis Range
The vertical axis is always pressure/depth for profile type data
(CTD, Bottle, etc.). Specify the range of the depth axis for gridding/plotting.
(Default = 0 - 6,500)
Specify parameters for the FRGID subroutine. FGRID was designed
and written by Roger B. Lukas (Dept. of Oceanography, Univ.
of Hawaii). The following description of the parameters is from
the original FRGID documentation:
- The parameter controlling the aspect ratio of the interpolation.
DEL is defined as dx/dy strictly, but has been made a parameter
to allow the user to exercise more control over the interpolation.
- The parameter controlling how much of the fourth order part
of the differential equation is to be used in the interpolation.
- The maximum distance in grid points which will be used to search
for valid data as a first estimate to the solution.
Type of plot. Options are:
LINE = Plot contour lines only.
AREA = Area-filled contour plot.
Specify a colormap (with full pathname) or choose one from the
list. A colormap is effective only for an area-filled plot. A colorbar
will always be displayed.
Specify desired contour levels following the style of the Plot
Plus command CLEV. Examples:
|for contour levels from 0 to 10 in increments
of .25, with 2 digits after the decimal in contour label and
contour levels from 10 to 20 in increments of 2, with integer
||for contour levels from 0 to 35 in increments
of .5, with 1 digit after the decimal in the contour label,
and dark lines from 0 to 35 in increments of 5
Show Data Points
If checked the original data points from the input profiles will
Label Profiles with Cast Number
If checked the input profiles will be labelled with their cast