Examples of open-meteo added

Author: aswind-1h2h3

openDataVisio/datadownload/data-download.ipynb

@@ -22,7 +22,7 @@
     "## The development environment setup\n",
     "The tutorials use the [Python](https://www.python.org/) programming language and its libraries:\n",
     "- [`earthkit`](https://earthkit.readthedocs.io/en/latest/) to speed up weather and climate science workflows\n",
-    "- [`ecmwf-opendata`](https://github.com/ecmwf/ecmwf-opendata)to download the ECMWF open data\n",
+    "- [`ecmwf-opendata`](https://github.com/ecmwf/ecmwf-opendata) to download the ECMWF open data\n",
     "- [`numpy`](https://pypi.org/project/numpy/c) for scientific computing of multi-dimensional arrays\n",
     "- [`cfgrib`](https://pypi.org/project/cfgrib/) to map GRIB files to the netCDF\n",
     "- [`requests`](https://pypi.org/project/requests/) (or urllib3, [`wget`](https://www.gnu.org/software/wget/manual/wget.html)) for sending HTTP requests\n",
@@ -1019,16 +1019,6 @@
    "id": "14889769-196b-42cf-aeed-73de42bcef37",
    "metadata": {},
    "source": [
-    "When you need to download a single field from a GRIB file, inspect the corresponding index file and look for the parameter of your interest. For example, to download only the 2m temperature at step=0h from the 00 UTC HRES forecast on 08 June 2025\n",
-    "```\n",
-    "{\"domain\": \"g\", \"date\": \"20250608\", \"time\": \"0000\", \"expver\": \"0001\", \"class\": \"od\", \"type\": \"fc\", \"stream\": \"oper\", \"step\": \"0\", \"levtype\": \"sfc\", \"param\": \"2t\", \"_offset\": 62556419, \"_length\": 660091}\n",
-    "```\n",
-    "use the values of `_offset`  and `_length` keys and calculate the `start_bytes` and `end_bytes` (the `_offset` and `_length` values of a specific field are different for each forecast run!)\n",
-    "```\n",
-    "start_bytes = _offset = 62556419\n",
-    "end_bytes = _offset + _length - 1 = 62556419 + 660091 - 1 = 63216509\n",
-    "```\n",
-    "\n",
     "```\n",
     "ROOT=\"https://data.ecmwf.int/forecasts\"\n",
     "yyyymmdd=\"20250608\"\n",
@@ -1064,6 +1054,40 @@
     "For more information, see [Access real-time open data with `wget`](https://confluence.ecmwf.int/display/DAC/ECMWF+open+data%3A+real-time+forecasts+from+IFS+and+AIFS#ECMWFopendata:realtimeforecastsfromIFSandAIFS-Locations).\n",
     ":::"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "75f0f714-1d0c-4349-b7ca-caa0140e32c1",
+   "metadata": {},
+   "source": [
+    "### 4. The [`curl`](https://curl.se/) command-line tool\n",
+    "When you need to download a single field from a GRIB file, inspect the corresponding index file and look for the parameter of your interest. For example, to download only the 2m temperature at step=0h from the 00 UTC HRES forecast on 08 June 2025\n",
+    "```\n",
+    "{\"domain\": \"g\", \"date\": \"20250608\", \"time\": \"0000\", \"expver\": \"0001\", \"class\": \"od\", \"type\": \"fc\", \"stream\": \"oper\", \"step\": \"0\", \"levtype\": \"sfc\", \"param\": \"2t\", \"_offset\": 62556419, \"_length\": 660091}\n",
+    "```\n",
+    "use the values of `_offset`  and `_length` keys and calculate the `start_bytes` and `end_bytes` (the `_offset` and `_length` values of a specific field are different for each forecast run!)\n",
+    "```\n",
+    "start_bytes = _offset = 62556419\n",
+    "end_bytes = _offset + _length - 1 = 62556419 + 660091 - 1 = 63216509\n",
+    "```\n",
+    "\n",
+    "```\n",
+    "ROOT=\"https://data.ecmwf.int/forecasts\"\n",
+    "yyyymmdd=\"20250608\"\n",
+    "HH=\"00\"\n",
+    "model=\"ifs\"\n",
+    "resol=\"0p25\"\n",
+    "stream=\"oper\"\n",
+    "step=\"0\"\n",
+    "U=\"h\"\n",
+    "type=\"fc\"\n",
+    "format=\"grib2\"\n",
+    "start_bytes=62556419\n",
+    "end_bytes=63216509\n",
+    "\n",
+    "curl --range \"$start_bytes-$end_bytes\" \"$ROOT/$yyyymmdd/$HH\"z\"/$model/$resol/$stream/$yyyymmdd$HH\"0000\"-$step$U-$stream-$type.$format\" --output 2t.grib2\n",
+    "```"
+   ]
   }
  ],
  "metadata": {
@@ -1082,7 +1106,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.17"
+   "version": "3.12.3"
   },
   "widgets": {
    "application/vnd.jupyter.widget-state+json": {