Pith Number

pith:Z2U6UAEU

pith:2021:Z2U6UAEUZE52X6E4GYEFXLKN5U

not attested not anchored not stored refs pending

The SpaceNet Multi-Temporal Urban Development Challenge

Adam Van Etten, Daniel Hogan

arxiv:2102.11958 v2 · 2021-02-23 · cs.CV

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z2U6UAEUZE52X6E4GYEFXLKN5U}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

GeoVision Labeler: Zero-Shot Geospatial Classification with Vision and Language Models

Receipt and verification

First computed	2026-07-05T02:42:03.896027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cea9ea0094c93babf89c36085bad4ded10a649caf636eeba83a70add3623f744

Aliases

arxiv: 2102.11958 · arxiv_version: 2102.11958v2 · doi: 10.48550/arxiv.2102.11958 · pith_short_12: Z2U6UAEUZE52 · pith_short_16: Z2U6UAEUZE52X6E4 · pith_short_8: Z2U6UAEU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/Z2U6UAEUZE52X6E4GYEFXLKN5U \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: cea9ea0094c93babf89c36085bad4ded10a649caf636eeba83a70add3623f744

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d21858135b7b8a9376ef4d754e0c111c5c63c65de9f2c8c38382c795a7e60004",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-02-23T22:01:22Z",
    "title_canon_sha256": "13cc4b82ea1b8639dc4cd5dde89d68f0ac7f88d67d645a9d7e62eb49b3d80732"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.11958",
    "kind": "arxiv",
    "version": 2
  }
}