Improve Output Formats

[SteffenME]

We need a more qualitative output format that gives discreet latitude and longitude to put in a chart plotter.
Possible Solution:

• Plain text in mail with cluster center/ centrum
• kml file
• Raster file for density map
• grib file
• Netcdf file

See also #81

[julled]

What would be a good output geometry for input in a plotter?
e.g. kml supports paths and polygons

[julled]

polygon could be created by full enclosing polygon or by slightly outlier filtered polygon.

[julled]

KML it supports acutally more geometrys:

[SteffenME]

Plotters often do support weather data aka grib files. KML is supported by flight planning tools (if i am not mistaken).

I think the lowest fruit would be plain text in the mail with exact location in dm of clusters

[julled]

Plotters often do support weather data aka grib files. KML is supported by flight planning tools (if i am not mistaken).

I think the lowest fruit would be plain text in the mail with exact location in dm of clusters

yes this is the lowest possible interface, but the area always resembles a complex geometry, which i think should be at best somehow transported too.

Maybe we should investigate / ask which plotters ship use and then provide some more formats. We dont need to limit us to only one.

[SteffenME]

KML export all Points with timestamp:

import simplekml
def export_kml(simulation):
    lons,lats=simulation.get_lonlats()
    time_array=simulation.get_time_array()
    kml=simplekml.Kml()
    for i in range(len(time_array[0])):
        for j in range(len(lons[...,i])):
            point=kml.newpoint(name=f'Point{i+j}')
            point.coords=[(lons[j,i],lats[j,i])]
            point.timestamp.when=time_array[0][i].strftime('%Y-%m-%dT%H:%M:%S')

[SteffenME]

Density maps can be exported to geotiff with rioxarray. Geotiffs can then be read by opencpn PhotoLayer Plugin