Efficient Multiple Site Requests

[ktarbet]

Context

In applications like HEC-DSSVue, users may need to perform actions for all sites within a given state.

Current Implementation

Action	Current Method	Efficiency
Metadata Lookups (e.g., period of record)	Batched across multiple sites in large chunks	Efficient
Data Downloads	Requires separate, individual queries for each time-series	Inefficient

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Describe the solution you'd like

Implement batched data downloads across multiple sites, using a large-chunk method similar to how we currently handle metadata lookups.

Data Suitability for Cross-Site Batching

Data Type	Example	Suitability	Rationale
Sparse Data	Annual Max Discharge	High	The limited number of values (one per year) allows multiple sites to fit within request limits.
Continuous Data	5-Minute Intervals	Low	A single site can easily exceed the USGS 50,000 record limit on its own, making cross-site batching less practical
Daily Data	1-Day Intervals	Medium	A single time-series 100 years long approaches the limit without chunking across time; multiple time-series queries could be investigated.

Note: We have already implemented pagination/chunking to handle continuous data limits within a single time-series (Site/Parameter/Statistic).