Ldm

LDM is an acronym that can refer to several concepts in information technology and data management. Two of the most common uses are Local Data Manager in meteorology and Logical Data Model in database design.

Local Data Manager, in meteorology and data distribution, is a software system for real-time ingestion, storage, and dissemination of weather data among geographically distributed organizations. The LDM typically operates on a publish–subscribe architecture, where data producers (feed writers) publish observations, satellite data, or forecasts to the system, and consumers (feed readers) subscribe to data streams of interest. Developed in part by academic and government researchers, notably UCAR and NOAA affiliates, the LDM network enables near real-time sharing of data such as observations, model outputs, and radar imagery across universities, laboratories, and partner agencies. It relies on data feeds, buffering, filtering, and routing rules, and records provenance and data quality checks to maintain reliability in distributed environments.

Logical Data Model is a high-level representation of data requirements for a domain, focusing on what data are and how they relate, without specifying how the data will be stored. It describes entities, attributes, and relationships in a way that is independent of a particular database technology. The logical model serves as an intermediary between business concepts and the physical implementation, guiding data consistency, integrity constraints, and naming standards. It is commonly used during the early phases of information system design to capture user needs and to align stakeholders on data semantics before creating a Physical Data Model.