Pith Number

pith:VVQIF7XA

pith:2016:VVQIF7XAWJHW2IMGJY5LJ4YTKO

not attested not anchored not stored refs pending

Chatty Maps: Constructing sound maps of urban areas from social media data

Daniele Quercia, Francesco Aletta, Luca Maria Aiello, Rossano Schifanella

arxiv:1603.07813 v1 · 2016-03-25 · cs.SI · cs.CY · cs.SD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VVQIF7XAWJHW2IMGJY5LJ4YTKO}

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	2026-05-18T01:18:17.772796Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad6082fee0b24f6d21864e3ab4f31353ac953f0988c6376363402965b2b2526f

Aliases

arxiv: 1603.07813 · arxiv_version: 1603.07813v1 · doi: 10.48550/arxiv.1603.07813 · pith_short_12: VVQIF7XAWJHW · pith_short_16: VVQIF7XAWJHW2IMG · pith_short_8: VVQIF7XA

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/VVQIF7XAWJHW2IMGJY5LJ4YTKO \
  | 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: ad6082fee0b24f6d21864e3ab4f31353ac953f0988c6376363402965b2b2526f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "993bc73e90b31694d82a37f1a41515006427a50163ae99b5579566d018b03d32",
    "cross_cats_sorted": [
      "cs.CY",
      "cs.SD"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2016-03-25T03:33:46Z",
    "title_canon_sha256": "245b5387971d7252130d73d0f90834cf2daf4273aadd1b6187bb365a172593f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.07813",
    "kind": "arxiv",
    "version": 1
  }
}