Pith Number

pith:QJ66QAF5

pith:2018:QJ66QAF5G7CK3QI4PYLTBDELGN

not attested not anchored not stored refs pending

Mapping Three-dimensional Urban Structure by Fusing Landsat and Global Elevation Data

Chengquan Huang, James C. Tilton, Panshi Wang

arxiv:1807.04368 v1 · 2018-07-11 · physics.soc-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QJ66QAF5G7CK3QI4PYLTBDELGN}

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.

Receipt and verification

First computed	2026-05-18T00:10:53.742549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

827de800bd37c4adc11c7e17308c8b335389457c7f4ef657924ef004bf37f6a0

Aliases

arxiv: 1807.04368 · arxiv_version: 1807.04368v1 · doi: 10.48550/arxiv.1807.04368 · pith_short_12: QJ66QAF5G7CK · pith_short_16: QJ66QAF5G7CK3QI4 · pith_short_8: QJ66QAF5

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/QJ66QAF5G7CK3QI4PYLTBDELGN \
  | 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: 827de800bd37c4adc11c7e17308c8b335389457c7f4ef657924ef004bf37f6a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e79c9ff49ac6d5f864eecf2c9cb828caeddf70532479784ab781cf198166b290",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2018-07-11T22:21:36Z",
    "title_canon_sha256": "2cac24bb4ff9a54bfe5f75def33542911e1890b7d1b6a0e7109a3f69859ca170"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04368",
    "kind": "arxiv",
    "version": 1
  }
}