package with python

1 files changed, 123 insertions, 0 deletions

diff --git a/metchart/plotter/horizontal.py b/metchart/plotter/horizontal.py
new file mode 100755
index 0000000..89945c3
--- /dev/null
+++ b/metchart/plotter/horizontal.py
@@ -0,0 +1,123 @@
+#!/usr/bin/env python3
+import os
+import json
+
+import xarray as xr
+
+import numpy as np
+import matplotlib.pyplot as plt
+from metpy.plots import MapPanel, PanelContainer, RasterPlot, ContourPlot
+
+from . import misc
+
+config = {
+    'source': 'dwd_icon-eu/combined.grib2',
+    'plots': [
+        {
+            'name':'r_t-750',
+            'area': None,
+            'layers': [
+                {
+                    'layertype': 'raster',
+                    'field': 'r',
+                    'level': 750,
+                },
+                {
+                    'layertype': 'contour',
+                    'field': 't',
+                    'level': 750,
+                    'contours': 5,
+                    'clabels': True
+                },
+            ]
+        },
+    ]
+}
+
+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, layers, area = None):
+    index = []
+
+    for step in data.coords['step']:
+        this_step = data.sel(step=step)
+
+        map_layers = []
+
+        for layer in layers:
+            map_layers.append(_layer(this_step, **layer))
+
+        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)
+        init_for_filename = init.strftime('%Y-%m-%d-%HUTC')
+
+        panel = MapPanel()
+        if area is not None:
+            panel.area = area
+        panel.projection = 'mer'
+        panel.layers = ['coastline', 'borders']
+        panel.plots = map_layers
+        panel.left_title = f'{name} VALID: {valid_str} (INIT +{hours_since_init_str}) INIT: {init_str}'
+        if '_description' in data.attrs:
+            panel.right_title = data.attrs['_description']
+
+        pc = PanelContainer()
+        pc.size = (12.8, 9.6)
+        #pc.figure.layout='constrained'
+        pc.panels = [panel]
+        pc.draw()
+        #pc.show()
+        outname = f'{name}_{init_for_filename}+{hours_since_init_str}.png'
+        pc.save(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'{name}.index.json'), 'w') as f:
+        f.write(json.dumps(index, indent=4))
+
+    return { 'name': name, 'indexfile': f'{name}.index.json', 'list_title': 'INIT+' }
+
+def _layer(data, layertype, **kwargs):
+    layertypes={
+        'raster': {
+            'obj': RasterPlot,
+            'defaults': {
+                'colorbar': 'vertical',
+            }
+        },
+        'contour': {
+            'obj': ContourPlot,
+            'defaults': {}
+        }
+    }
+
+    args = layertypes[layertype]['defaults'] | kwargs
+
+    ret = layertypes[layertype]['obj'](**args)
+    ret.data = data
+
+    return ret
+
+if __name__ == '__main__':
+    run(**config)