Retrieving fields with polytope¶

The polytope source provides access to the Polytope web services.

The following example retrieves data from the ECMWF MARS archive using polytope. The dataset was prepared for the OGC GeoDataCubes working group, see details here.

[1]:

import earthkit.data as ekd

request = {
    "stream": "oper",
    "levtype": "pl",
    "levellist": "500",
    "param": "129.128",
    "step": "0/12",
    "time": "00",
    "date": "20200915",
    "type": "fc",
    "class": "rd",
    "expver": "hsvs",
    "domain": "g",
}

ds = ekd.from_source("polytope", "ecmwf-mars", request, stream=False)
ds.to_fieldlist().ls()

[1]:

	parameter.variable	time.valid_datetime	time.base_datetime	time.step	vertical.level	vertical.level_type	ensemble.member	geography.grid_type
0	z	2020-09-15 00:00:00	2020-09-15	0 days 00:00:00	500	pressure	0	None
1	z	2020-09-15 12:00:00	2020-09-15	0 days 12:00:00	500	pressure	0	None

[ ]: