Navy Rules Database METOC Server Integration
Abstract
This report presents a summary of enhancements made to the NRL METOC Server to allow integration with the Navy Rules Database (NRDB). With these changes NRDB can be used across various endpoints in the METOC server to visualize the impact of weather conditions on equipment listed within the database. One of the most common uses of the METOC Server is for data visualization through its WMS. Users may visit the metocserver/ogc/wms endpoint to view a list of the available data models supported by the service. Traditionally each model that is listed in the WMS is backed by data found in the METOC Server catalog under the same model name. Some examples of such models are HYCOM, NAVGEM, and COAMPS. The NRDB WMS service is an exception to this. There are no NRDB specific NetCDF or GRIB files cataloged in the METOC Server. NRDB is instead classified as a derived product, a product whose values are calculated using a combination of variables from existing models. To service a request for a given platform NRDB will often end up reading data from more than one model. For example, HYCOM might be used to retrieve salinity, NAVGEM for air temp, and COAMPS for ice coverage. This is necessary because NRDB WMS queries are performed on a specific asset, and assets often have rules that are based on data found across multiple models. Based on the rules for each asset, the METOC Server builds a mapping of value ranges to impact statuses. This mapping can be displayed in the form of a legend using a GetLegend Graphic request. Traditionally legends are often built for a single variable, but since NRDB assets have rules that may span many variables the NRDB legend can be thought of as a combination of multiple smaller legends. The legend provides users with a way to quickly identify the value ranges associated with each impact status. Note that all example outputs presented in this document are generated using a set of fake impact rules and assets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 05, 2023
- Accession Number
- AD1212709
Entities
People
- Clifford Wilson
Organizations
- United States Naval Research Laboratory