>= 0 everywhere outside of procedure local_extrema.

In test Nearby_extr, use output from Get_snapshot_region_1_noise since
we now use suff_amp in extremum shapefile.

Stdin to Input. Two input dir provided for in tests.json: $input_dir
and $large_input_dir.

Rename everywhere variable nearby_extr to outside_points to avoid
confusion with function nearby_extr. Rename file "nearby_extr.csv" to
"outside_points.csv".

In procedure nearby_extr, include in the selection extrema with
different sign, even if they do not have sufficient amplitude.

Bug fix in read_eddy: use the value of read attribute to define
e%interpolated.

Bug fix in test_set_max_speed: forgot conversion to rad.

procedure set_all_outerm. The idea is that, in this branch,
nearby_extr will eventually include extrema depending not only on them
having sufficient amplitude but also on their cyclonicity. Both pieces
of information cannot be simply encoded in extr_map.

instead of defining the component ssh to the ssh of the extremum or to
the ssh of the outermost contour, use a missing value flag
(1e4). Also, when radius4 >= 2 and the max speed contour is the
outermost contour, use missing value flag in the ssh component of max
speed contour instead of ssh on outermost contour. This makes clearer
output.

Add function null_ssh_contour.

In procedure get_1_outerm, simplify the comparison of level_try and
level_good. So we do not need any longer the dummy argument
ssh_extremum.

Propagate change in shapelib_03: shp_append_simple_object_03 to
shp_append_object_03.

with some components intent(in) and one component intent(out) was less
clear. Also, replace argument ind_targ_extr by argument i. This is
simpler both in get_1_outerm and in set_all_outerm.

There is now no need to use an eddy in test_get_1_outerm.

out-of-range index so add min when calculating urc.

Bug fix in procedure good_contour. polygon_contains_point should not
be called if polyline is not closed.

Procedure polygon_contains_point became unpure so remove pure for
procedure inside_4 too.

In program test_good_contour, read corner and step from namelist
rather than from coordinates in NetCDF file. Makes it possible to use
the same NetCDF file with different coordinates. Also read
outside_points from a file rather than standard input so there is no
need to specify in advance the number of outside points.

Take into account the possibility that no outermost contour was found
in program test_set_outermost_contour. Also, use fixed names for input
files because it is not convenient to require a particular order of
these two files on the command line.

defined. Also, allow test_set_outermost_contour to read ssh from a
NetCDF variable with a degenerate time coordinate or with no time
coordinante.

"stdout" key became optional in "tests.json" and "directory" key
became "title", with no indication of directory.

contour.

Read whole NetCDF files in program test_set_outermost_contour instead
of specifying a reading window. Simpler to prepare a file outside
the Fortran program, as in program test_local_extrema. Also, compute
step from read longitude and latitude.

acceptable. So define flat_extr by a strict inequality in procedure
get_snapshot.

Procedure set_outermost_contour no longer has a dummy argument
noise_around. We no longer call outermost_possible_level so we do not
have an artificial discontinuity of results with and without maximum
amplitude. We abandon the idea of reducing the amplitude of initial
level_good compared to innermost_level: problem of consistence with
get_snapshot, and it does not seem worth the trouble, just abandon
those problematic extrema. Allow for null outermost_contour instead of
aborting.

In procedure get_snapshot, s%list_vis(i)%suff_amp is first defined
only if flat_extr(i). Also we are no longer sure that
set_outermost_contour finds an outermost contour so we have to test
this to define s%list_vis(i)%suff_amp. noise_around is now defined
only for flat_extr(i) and s%list_vis(i)%suff_amp. Also, since we may
not find an outermost contour even if not flat_extr(i), we update
s%extr_map after the second call to set_outermost_contour.

In procedure local_extrema, we use the mask diff_center instead of
mask_center. So we no longer need procedure construct_mask_center. In
procedure local_extrema, we ignore one in two adjacent degenerate
extrema instead of aborting.

In plot_snapshot.py, color extrema and allow for null outermost
contour.

Synthesize output in test_local_extrema.py.

low-amplitude threshold, min_amp.

Add component suff_amp to derived type eddy. Write this component in
extremum_$m.dbf.

In shapefiles, write positions of vertices in degrees rather than
radians.

test_get_snapshot reads the whole domain of input NetCDF files instead
of selecting a window through a namelist. This is clearer and more
convenient. Same in test_get_snapshot.py, test_local_extrema and
test_local_extrema.py.

In test_get_snapshot.py, annotate extrema instead of inserting a
legend.

More correct names: radian_per_degree to deg_over_rad,
degree_per_radian to rad_over_deg.

test_good_contour has more general input.

test_inside tests only inside, no loop on radius.

but reads extr_map from a file.

call only one procedure per test, and read all the required
data. (Also: there was much duplication of code between
test_set_outermost_contour and test_max_speed_contour_ssh.)

threshold. outermost_contour becomes set_outermost_contour. get_eddy
disappears: it will be absorbed in get_snapshot. get_snapshot is
temporarily broken so we do not compile test_get_snapshot.

set_outermost_contour is in charge of finding nearby_extr and the
initial value of level_try (get_outermost_contour was not). The method
for this depends on the value of noise_around. The rest of the
processing in set_outermost_contour is identical to what was done in
get_outermost_contour.

Made test_max_speed_contour_ssh more general: longitude-latitude
window and eddy identifying number may be chosen at run-time. Made
test_set_outermost_contour more general than test_outermost_contour
was: longitude-latitude window and eddy identifying number may be
chosen at run-time.

For both test_max_speed_contour_ssh and test_set_outermost_contour,
only the chosen longitude-latitude window is read from the NetCDF
files. We have to call local_extrema because set_outermost_contour
takes extr_map as an input argument (get_outermost_contour did not)
and because longitude-latitude window and eddy identifying number may
be chosen at run-time.