Display data from HF radar (speed and direction of ocean surface currents)

KNMI / adaguc-server

ADAGUC is a geographical information system to visualize netCDF files via the web. The software consists of a server side C++ application and a client side JavaScript application. The software provides several features to access and visualize data over the web, it uses OGC standards for data dissemination.

Apache License 2.0

27 stars 26 forks source link

Display data from HF radar (speed and direction of ocean surface currents) #318

Open MarcoAlbaETT opened 1 year ago

MarcoAlbaETT commented 1 year ago

Hi, I've data from HF Radar (speed and direction of ocean surface currents) where currents are stored with two variables:

EWCT (West-east current component)
NSCT (South-north current component) I've tried to configure a dataset in order to display something like:

without success.

Data are from OpenDAP like https://data-erddap.emodnet-physics.eu/erddap/griddap/HFR_EUSKOOS_Total_NRT https://data-erddap.emodnet-physics.eu/erddap/griddap/HFR_DELTAEBRO_Total (these are ERDDAP datasets)

Can anyone help me configuring these datasets (if possible)?

Thanks

Marco

ernstdevreede commented 1 year ago

In principle ADAGUC can display layers for directional data with arrows. This can be achieved by configuring a layer with 2 elelements, in this case EWCT and NSCT nad using a vector plotting style. However the vector plotting code is designed for atmospheric currents and displays only a dot for current speeds beneath 1 m/s. In the atmosphere such low wind speeds are rated as non-relevant. Unfortunately ocean currents are very often less strong than 1 m/s, so no useful display can be generated by ADAGUC at the moment. We might need to do some code adaptations if we want to support this.

MarcoAlbaETT commented 9 months ago

Thanks for the clarification!