inconsitency adding lat labelling on the right (on graticules)...

[peters77]

Code Sample, a minimal, complete, and verifiable piece of code

# Your code here
font=aggdraw.Font('yellow','/usr/share/fonts/truetype/dejavu/DejaVuSerif.ttf', opacity = 200, size=30)
areaid = 'eurol'
#areaid = 'germ'
lscn = scn.resample(areaid, radius_of_influence=10000)

lscn.save_dataset(composite, imgdir + '/Metop-A.jpg',
                          overlay={'coast_dir': '/satpy/coastlines/', 'color': (255, 255, 0), 'width': 1.0, 'resolution': 'i',
                          'grid': {'major_lonlat': (10, 10), 'minor_lonlat':(2, 2),'font': font,
                          'write_text': True,
                          'outline': (224, 224, 0), 'outline_opacity': 175,
                          'width': 1.0, 'minor_width':0.5, 'minor_outline_opacity': 175, 'minor_is_tick': False, 'lon_placement':'tb', 'lat_placement': 'lr'}}, fill_value=0)

Problem description

There seems to be some strange inconsitency adding lon/lat labeling in satpy.
If I try to place the labeling with
'lon_placement':'tb', 'lat_placement': 'lr'
and area = eurol

the '20N' lable is missing on the lower right corner

If I set e.g.
area = germ

the lat label '50N' is missing on the right. I can't get a labeling on the right (pic2)
I even tried to set ''lat_placement': 'lr' " or 'lat_placement': 'r'. But no labeling on the right.

Another example, 40N, 50N and 60N missing, 'lat_placement': 'lr'

Versions of Python, package at hand and relevant dependencies

satpy-0.14.1
pycoast-1.2.2
Python 3.6

[mraspaud]

I think this mail from Ernst is related:
Here is the diff of cw_base.py distributed
with current pycoast 1.2.3 (<) and my corrected version (>).

102c102
<         offset by margins and returns an array of coordintes"""
---
>         offset by margins and returns an array of coordinates"""
123c123
<         ylim2 = y_size - margins[0]
---
>         ylim2 = y_size - margins[1]
129c129
<         # loop trought line steps and detect crossings
---
>         # loop trough line steps and detect crossings
237c237
<         # posituion text labels near edges of image...
---
>         # position text labels near edges of image...
256c256
<         lin_lons = np.arange(lon_min, lon_max + Dlon / 5.0, Dlon / 10.0)
---
>         lin_lons = np.arange(lon_min, lon_max + Dlon / 5.0, Dlon / 100.0)
303c303
<                                       Dlon / 50.0)
---
>                                       Dlon / 500.0)
359c359
<                                       Dlat / 50.0)
---
>                                       Dlat / 500.0)

[djhoese]

So we need to test that code out is what you're saying?

[mraspaud]

If we don't get a PR from Ernst, then yes...

[peters77]

I can test it if martin patch the code and there is a branch to install?

[mraspaud]

@peters77 I applied the patch in #33, feel free to test