Pith Number

pith:DDLUDHQF

pith:2019:DDLUDHQFN44QFIWDVGVFHAP4JT

not attested not anchored not stored refs pending

Mapping Informal Settlements in Developing Countries using Machine Learning and Low Resolution Multi-spectral Data

Alejandro Coca-Castro, Bradley Gram-Hansen, Faiza Azam, Indhu Varatharajan, Patrick Helber, Piotr Bilinski, Veronika Kopackova

arxiv:1901.00861 v3 · 2019-01-03 · cs.CY · cs.CV · cs.LG · 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{DDLUDHQFN44QFIWDVGVFHAP4JT}

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	2026-05-17T23:44:42.694833Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18d7419e056f3902a2c3a9aa5381fc4cf9a1bde403289d80c33781d0fe390c3e

Aliases

arxiv: 1901.00861 · arxiv_version: 1901.00861v3 · doi: 10.48550/arxiv.1901.00861 · pith_short_12: DDLUDHQFN44Q · pith_short_16: DDLUDHQFN44QFIWD · pith_short_8: DDLUDHQF

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/DDLUDHQFN44QFIWDVGVFHAP4JT \
  | 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: 18d7419e056f3902a2c3a9aa5381fc4cf9a1bde403289d80c33781d0fe390c3e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7d75e4cc5f7fbd45b1eabb408ab69ee3c424088da9b74a848ff59f4c5369ad9",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2019-01-03T16:51:40Z",
    "title_canon_sha256": "be986ddb5832082ffb9bea399959fa327fd88feb664a107213cd545b9036c8ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.00861",
    "kind": "arxiv",
    "version": 3
  }
}