package with python

1 files changed, 101 insertions, 0 deletions

diff --git a/metchart/plotter/vertical_from_grib.py b/metchart/plotter/vertical_from_grib.py
new file mode 100755
index 0000000..c632b0b
--- /dev/null
+++ b/metchart/plotter/vertical_from_grib.py
@@ -0,0 +1,101 @@
+#!/usr/bin/env python3
+import os
+
+import datetime
+import json
+
+import matplotlib.pyplot as plt
+
+import xarray as xr
+from metpy.units import units
+import metpy.calc as mpcalc
+import numpy as np
+
+import skewt
+
+from . import misc
+
+config = {
+    'source':'dwd_icon-eu/combined.grib2',
+    'plots':[
+        {
+            'lat':47.9626,
+            'lon':11.9964,
+            'name':'Antersberg',
+            'analysis':'lcl'
+        },
+    ]
+}
+
+def run(data, plots, output='.'):
+    misc.create_output_dir(output)
+    index = []
+
+    for plot in plots:
+        index.append(_plot(data, output, **plot))
+
+    return index
+
+def _plot(data, output, name, lat=None, lon=None, analysis=None):
+    for_temp = data[['r', 't', 'u', 'v']]
+
+    if not (lat is None and lon is None):
+        for_temp = for_temp.sel(latitude=lat, longitude=lon, method='nearest')
+
+    index = []
+
+    for step in for_temp.coords['step']:
+        this_step = for_temp.sel(step=step)
+
+        p = this_step.coords['isobaricInhPa'].values * units.hPa
+        T = this_step.t.values * units.K
+        relHum = this_step.r.values * units.percent
+        Td = mpcalc.dewpoint_from_relative_humidity(T, relHum)
+        u = this_step.u.values * (units.m / units.s)
+        v = this_step.v.values * (units.m / units.s)
+
+        valid = misc.np_time_convert(step.valid_time.values)
+        init = misc.np_time_convert(step.time.values)
+
+        valid_str = valid.strftime('%d %b %Y - %HUTC')
+        init_str = init.strftime('%d %b %Y - %HUTC')
+        hours_since_init_str = str(int(this_step.step.values / np.timedelta64(1,'h'))).zfill(2)
+
+        skt = skewt.Skewt(p=p, T=T, Td=Td)
+        skt.addWindUV(u, v)
+        skt.addInfo(f'{name} INIT+' + hours_since_init_str)
+        skt.addInfo(f"VALID: {valid_str}")
+        skt.addInfo(f"INIT : {init_str}")
+        skt.addInfo(f"LAT {lat} LON {lon}")
+
+        if analysis is not None:
+            skt.addAnalysis(shade=True, analysis=analysis)
+
+        if '_description' in data.attrs:
+            skt.addInfo(data.attrs['_description'])
+
+        init_for_filename = init.strftime('%Y-%m-%d-%HUTC')
+
+        outname = f'skewt_{name}_{init_for_filename}+{hours_since_init_str}.png'
+        skt.plot(filename=os.path.join(output, outname))
+
+        plt.close('all')
+
+        index.append(
+            {
+                'file': outname,
+                'init': init_str,
+                'valid': valid_str,
+                'valid_offset': hours_since_init_str,
+                'display_name': name,
+                'id': name
+            }
+        )
+
+    with open(os.path.join(output, f'skewt_{name}.index.json'), 'w') as f:
+        f.write(json.dumps(index, indent=4))
+
+    return {'name': name, 'indexfile': f'skewt_{name}.index.json', 'list_title': 'Location'}
+
+if __name__ == '__main__':
+    run(**config)