ADCPLOT

NetCDF Plotting API

NetCDF data access is based on xarray. Plotting routines are based on bokeh.

To run the service a working docker environment is needed and make sure the docker-compose tool is available.

On debian based linux distribution simply run:

apt-get install docker-io docker-compose

To start the service, clone this repository and execute the docker-compose instruction:

git clone https://github.com/NorDataNet/adcplot
cd adcplot
docker-compose up

Note: you may nedd root privileges depending on how your docker settings.

Once the service is running, assuming a NetCDF resource is available at resource_url:

• Get list of variables from a NetCDF resource

  • http://localhost:7000/adcplot/plot?get=param&resource_url=resource_url

• Get the bokeh plot of a selected variable embedded in a html div tsplot

  • http://localhost:7000/adcplot/plot?get=plot&resource_url=resource_url&variable=variable_name&axis=axis_name

Example using the built-in example data served via hyrax opendap server:

curl http://localhost:7000/adcplot/plot?get=param&resource_url=http://hyrax:8080/opendap/SN99938.nc

which will return the following json:

{"y_axis":["air_pressure_at_sea_level",
           "surface_air_pressure_2m", 
           "air_temperature_2m", 
           "air_pressure_at_sea_level_qnh", 
           "wind_speed_10m", 
           "wind_from_direction_10m", 
           "relative_humidity"]}

To get a json object that can be embeded in a html div named tsplot:

http://localhost:7000/adcplot/plot?get=plot&resource_url=http://hyrax:8080/opendap/SN99938.nc&variable=air_pressure_at_sea_level&axis=y_axis

To test the plotting widget is possible to code the API call into an HTML file using fetch, see example.