Fig. 2
Schematic of the data storage and related infrastructure surrounding the COVID-19 Forecast Hub. (A) Forecasts are submitted to the COVID-19 Forecast Hub GitHub repository and undergo data format validation before being accepted into the system. (B) A continuous integration service ensures that the GitHub repository and PostgreSQL database stay in sync with mirrored versions of the data. (C) Truth data for visualization, evaluation, and ensemble building are retrieved once per week using both the covidHubUtils and the covidData R packages. Truth data are stored in both repositories. (D) Once per week, an ensemble forecast submission is made using the covidEnsembles R package. It is submitted to the GitHub repository and undergoes the same validation as other submissions. (E) Using the covidHubUtils R package, forecast and truth data may be extracted from either the GitHub or PostgreSQL database in a standard format for tasks such as scoring or plotting.
