Tilde, an interdisciplinary data access solution serving GeoNet's volcano and other hazard data

Abstract

Tilde is a new in-house developed solution that the GNS Science’s GeoNet programme has recently developed to provide storage and access to low sample rate datasets used to monitor tsunami, landslides and volcanoes in Aotearoa New Zealand. It includes datasets covering sample rates of minutes or longer. Time series data are stored and disseminated in JSON and CSV formats, and users can access these through an Application Programming Interface (API) and a Graphical User Interface (GUI). Tilde’s GUI was created to allow technical and non-technical users easy access to the available data. The introduction of Tilde system as one of the GeoNet programme delivery channels has represented a big step forward for GeoNet’s volcano data holdings by providing a single point to access all low to medium sample rate volcano specific monitoring data. We designed the system, developed a domain model, an API, a graphical data discovery interface and associated data tutorials. This work leverages the Open by Default data policy for data generated through the GeoNet programme. This paper is intended to highlight how we made many of the key decisions that shaped Tilde system, how they were impacted by our multi-hazard monitoring requirements and how they have improved access to volcano monitoring data. We conclude with some open questions about the need of developing common standards to share analysis-ready time series data within different disciplines in volcanology and geophysics.