Pith Number

pith:D4VZ4IUE

pith:2018:D4VZ4IUEJVGOEHCSGJ6KXPJL7A

not attested not anchored not stored refs pending

Infrastructure Quality Assessment in Africa using Satellite Imagery and Deep Learning

Annie Hu, Barak Oshri, David Lobell, Jeremy Weinstein, Marshall Burke, Pascaline Dupas, Peter Adelson, Stefano Ermon, Xiao Chen

arxiv:1806.00894 v1 · 2018-06-03 · cs.CY · cs.CV · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D4VZ4IUEJVGOEHCSGJ6KXPJL7A}

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	2026-05-18T00:01:48.850719Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f2b9e22844d4ce21c52327cabbd2bf81688a89fcecb004c7140ef893436c5eb

Aliases

arxiv: 1806.00894 · arxiv_version: 1806.00894v1 · doi: 10.48550/arxiv.1806.00894 · pith_short_12: D4VZ4IUEJVGO · pith_short_16: D4VZ4IUEJVGOEHCS · pith_short_8: D4VZ4IUE

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/D4VZ4IUEJVGOEHCSGJ6KXPJL7A \
  | 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: 1f2b9e22844d4ce21c52327cabbd2bf81688a89fcecb004c7140ef893436c5eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b1bdae72bcf15d133f0c25b3a2bdd179610c64b91e47235c688ac0162f404608",
    "cross_cats_sorted": [
      "cs.CV",
      "stat.ML"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2018-06-03T23:30:01Z",
    "title_canon_sha256": "d111dacc4d8a2ca969de667b219c3479fb94f0f74537618d2ed697e62305d677"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.00894",
    "kind": "arxiv",
    "version": 1
  }
}