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What is upstream of this pixel like?

Shape measures like perimeter or elongation normally have to be computed on demand: delineate the catchment of the point you care about, walk its boundary, then do the arithmetic. Here all sixteen — eight terrain statistics and eight shape metrics — are already computed and stored at the pixel for every pixel with at least 10 km² of upstream drainage area, so getting them is a raster read. This is possible because every pixel stores a depth-first interval, and both the catchment and its divide follow from those two numbers; that is what makes computing them at every pixel, rather than at a fixed list of outlets, affordable.

Global map(unavailable)Example basin (pixel-level)
Global map(unavailable)Not available in a browser: the sixteen values are stored at every land pixel with at least 10 km² upstream, far more than a web map can draw. The rasters are in the Zenodo archive. A browsable version arrives at reach level with FullRiver.
Example basin (pixel-level)Basin 8595: click a pixel and read the sixteen upstream attributes stored there
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Attributes at the selected pixel

Click a pixel on the map. The page draws its upstream catchment, the divide around it and the two axes the shape metrics are built from, and lists the sixteen stored values.
Basin 8595 pixels that carry the sixteen attributes
the upstream catchment those values describe
the divide around it
L∥, the axial length
L⊥ and the bounding box
L∥ = max ∥p − v∥, p ∈ ∂U(v)
Site under development — for browsing only, not for download yet. Some results are still being recomputed with refined methods, so the files here may still be replaced. Any changes to the results are small refinements, not major revisions. When this notice is gone, the files are final and ready to download. The version described in the paper is archived on Zenodo and does not change. Comments are welcome: lulu_jiang@pku.edu.cn