TNM elevation products

Use products to request specific elevation products from The National Map:

fetchez run --global-hook list-only -R -124.5/-124.0/41.5/44.0 tnm --products 1m/1_3as

Supported names are s1m, 1m, 1_9as, 1_3as, 1_as, 5m, and 2_as. Each product is queried separately, in the requested order. Repeated names are queried once. This order does not establish coverage precedence.

Each entry includes tnm_product and tnm_dataset, along with the existing source ID, publication date, update date, and metadata links supplied by TNM. tnm_project is the decoded project directory from the download URL, when present. It is not a verified WESM project identifier. No WESM lookup is made.

Downloads requested through products use a product directory and a short URL hash before the filename, so different endpoints with the same filename do not overwrite each other. Overlapping entries remain available to hooks.

Product queries raise an error if the API rejects the dataset, fails a request, or returns incomplete or inconsistent pages. Entries collected during that run are removed before the error is raised. A failed query must not be treated as evidence that a higher-resolution product has no coverage. A successful query returning zero products is allowed.

The existing datasets argument and default one-arc-second query remain available. Do not combine products and datasets. Use --strict-datasets true with datasets to request the same error handling; otherwise the existing broad-search fallback remains available. Results from that fallback are not assigned a specific product label.

Discovery provides API bounding boxes. Use footprint hooks to obtain more precise geometry and spatial_cull when whole overlapping entries should be removed. Partial coverage exclusions, resolution precedence, and WESM project matching belong in the consuming application, such as Globato.