National Open-Data Terrain (tablecn)

The same table as National Open-Data Terrain, rendered with tablecn's data table (shadcn/ui on Base UI, TanStack Table v9) in its client mode, useDataTable({ mode: "client" }), for comparison. The original page's separate tables (the four Mapterhorn groups, regional datasets, surface models and global datasets) are one table here: Category, vs Mapterhorn, Country, API resolution (by class), Served as and Model are faceted filters, and the search box looks through codes, countries, dataset names and coverage. Column headers sort and hide; View picks the columns, including Model and the source id, which start hidden. Sort, filters and page live in the address bar, Show all replaces the pages with one, and Export CSV saves the rows shown. API resolution is the grid the live service streams, Bulk download the finest grid the agency advertises for download, which is what Mapterhorn ingests.