Remote Data Acquisition & Subsetting

Downloading massive operational datasets (e.g. 50 GB daily atmospheric forecasts) is often impractical. Capella Datascience implements the OpenDAP (Open-source Project for a Network Data Access Protocol) and OGC WMS/WCS clients to stream precise slices of interest across standard HTTP connections.

OpenDAP Streaming Mechanism

1. DAS / DDS / DDX Request: Fetches dataset attributes and structure over HTTP without downloading array values.
2. DODS Binary Streaming: When a 2D slice is visualized, Capella Datascience sends an OpenDAP constraint expression (e.g. temperature[0:1:0][5:1:5][0:1:100][0:1:200]).
3. On-Demand Decoding: Only the exact slice payload is retrieved and rendered, reducing network transfer by over 99%.