{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:O2G56IEEDHJ5NZEPKVVJLHVOP5","short_pith_number":"pith:O2G56IEE","canonical_record":{"source":{"id":"1605.08485","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2016-05-27T00:58:30Z","cross_cats_sorted":[],"title_canon_sha256":"2372bea6c5bf043aafaa3ffc81eb845ff2318ecb9d211d4432cf89f118ae4c56","abstract_canon_sha256":"30816aee3b616016b8199fcfb0bb69781a74df7ffeb3ff377d21c2789aa3e373"},"schema_version":"1.0"},"canonical_sha256":"768ddf208419d3d6e48f556a959eae7f613f1034d01ed9bdadcd81d413ee31b3","source":{"kind":"arxiv","id":"1605.08485","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08485","created_at":"2026-05-18T01:04:37Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08485v3","created_at":"2026-05-18T01:04:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08485","created_at":"2026-05-18T01:04:37Z"},{"alias_kind":"pith_short_12","alias_value":"O2G56IEEDHJ5","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"O2G56IEEDHJ5NZEP","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"O2G56IEE","created_at":"2026-05-18T12:30:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:O2G56IEEDHJ5NZEPKVVJLHVOP5","target":"record","payload":{"canonical_record":{"source":{"id":"1605.08485","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2016-05-27T00:58:30Z","cross_cats_sorted":[],"title_canon_sha256":"2372bea6c5bf043aafaa3ffc81eb845ff2318ecb9d211d4432cf89f118ae4c56","abstract_canon_sha256":"30816aee3b616016b8199fcfb0bb69781a74df7ffeb3ff377d21c2789aa3e373"},"schema_version":"1.0"},"canonical_sha256":"768ddf208419d3d6e48f556a959eae7f613f1034d01ed9bdadcd81d413ee31b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:04:37.268171Z","signature_b64":"9r7EJr5hAVPhXYaZESb8RozlQEwhcDbKjLETHmwDfSExGWJ1Tp7mYyPuEcCvav2hDCdf/ExY+gSvtPRoDMnHAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"768ddf208419d3d6e48f556a959eae7f613f1034d01ed9bdadcd81d413ee31b3","last_reissued_at":"2026-05-18T01:04:37.267440Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:04:37.267440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.08485","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:04:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lw/506QNzYyI/P+uFdZE1NnHUu4kcmINPOAPXvYHJ19RTeIX0mtn1nbNb0SqwfPYNKgl/FNAoO0BLZD2Qx6BBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T06:17:24.162419Z"},"content_sha256":"24e2a0504f5e0df0fc21fd3fc018723142ea92f918dc1d61a7ca325a2651fe47","schema_version":"1.0","event_id":"sha256:24e2a0504f5e0df0fc21fd3fc018723142ea92f918dc1d61a7ca325a2651fe47"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:O2G56IEEDHJ5NZEPKVVJLHVOP5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The State of the Art in Cartograms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.HC","authors_text":"Sabrina Nusrat, Stephen Kobourov","submitted_at":"2016-05-27T00:58:30Z","abstract_excerpt":"Cartograms combine statistical and geographical information in thematic maps, where areas of geographical regions (e.g., countries, states) are scaled in proportion to some statistic (e.g., population, income). Cartograms make it possible to gain insight into patterns and trends in the world around us and have been very popular visualizations for geo-referenced data for over a century. This work surveys cartogram research in visualization, cartography and geometry, covering a broad spectrum of different cartogram types: from the traditional rectangular and table cartograms, to Dorling and diff"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08485","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:04:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6GsdC4KbyYFvBWd+KDJ/t64nTxbGdy+7yMJstcl3mdBvK7p1CkjBd11XY2o2qUETYRRJhIRE+6woJ5cZBwDXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T06:17:24.163110Z"},"content_sha256":"94e787f6610b26b262d1d2507e140f59039f9f668fbc4a68d8451a93d2c0119e","schema_version":"1.0","event_id":"sha256:94e787f6610b26b262d1d2507e140f59039f9f668fbc4a68d8451a93d2c0119e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O2G56IEEDHJ5NZEPKVVJLHVOP5/bundle.json","state_url":"https://pith.science/pith/O2G56IEEDHJ5NZEPKVVJLHVOP5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O2G56IEEDHJ5NZEPKVVJLHVOP5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-01T06:17:24Z","links":{"resolver":"https://pith.science/pith/O2G56IEEDHJ5NZEPKVVJLHVOP5","bundle":"https://pith.science/pith/O2G56IEEDHJ5NZEPKVVJLHVOP5/bundle.json","state":"https://pith.science/pith/O2G56IEEDHJ5NZEPKVVJLHVOP5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O2G56IEEDHJ5NZEPKVVJLHVOP5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:O2G56IEEDHJ5NZEPKVVJLHVOP5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"30816aee3b616016b8199fcfb0bb69781a74df7ffeb3ff377d21c2789aa3e373","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2016-05-27T00:58:30Z","title_canon_sha256":"2372bea6c5bf043aafaa3ffc81eb845ff2318ecb9d211d4432cf89f118ae4c56"},"schema_version":"1.0","source":{"id":"1605.08485","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08485","created_at":"2026-05-18T01:04:37Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08485v3","created_at":"2026-05-18T01:04:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08485","created_at":"2026-05-18T01:04:37Z"},{"alias_kind":"pith_short_12","alias_value":"O2G56IEEDHJ5","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"O2G56IEEDHJ5NZEP","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"O2G56IEE","created_at":"2026-05-18T12:30:36Z"}],"graph_snapshots":[{"event_id":"sha256:94e787f6610b26b262d1d2507e140f59039f9f668fbc4a68d8451a93d2c0119e","target":"graph","created_at":"2026-05-18T01:04:37Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Cartograms combine statistical and geographical information in thematic maps, where areas of geographical regions (e.g., countries, states) are scaled in proportion to some statistic (e.g., population, income). Cartograms make it possible to gain insight into patterns and trends in the world around us and have been very popular visualizations for geo-referenced data for over a century. This work surveys cartogram research in visualization, cartography and geometry, covering a broad spectrum of different cartogram types: from the traditional rectangular and table cartograms, to Dorling and diff","authors_text":"Sabrina Nusrat, Stephen Kobourov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2016-05-27T00:58:30Z","title":"The State of the Art in Cartograms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08485","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:24e2a0504f5e0df0fc21fd3fc018723142ea92f918dc1d61a7ca325a2651fe47","target":"record","created_at":"2026-05-18T01:04:37Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"30816aee3b616016b8199fcfb0bb69781a74df7ffeb3ff377d21c2789aa3e373","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2016-05-27T00:58:30Z","title_canon_sha256":"2372bea6c5bf043aafaa3ffc81eb845ff2318ecb9d211d4432cf89f118ae4c56"},"schema_version":"1.0","source":{"id":"1605.08485","kind":"arxiv","version":3}},"canonical_sha256":"768ddf208419d3d6e48f556a959eae7f613f1034d01ed9bdadcd81d413ee31b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"768ddf208419d3d6e48f556a959eae7f613f1034d01ed9bdadcd81d413ee31b3","first_computed_at":"2026-05-18T01:04:37.267440Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:37.267440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9r7EJr5hAVPhXYaZESb8RozlQEwhcDbKjLETHmwDfSExGWJ1Tp7mYyPuEcCvav2hDCdf/ExY+gSvtPRoDMnHAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:37.268171Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.08485","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24e2a0504f5e0df0fc21fd3fc018723142ea92f918dc1d61a7ca325a2651fe47","sha256:94e787f6610b26b262d1d2507e140f59039f9f668fbc4a68d8451a93d2c0119e"],"state_sha256":"8c1a1824f5ac5a72fad5fd5b84b702b6c7cf0402d23f468216b1cc85aa41f09b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/xqGWH10WaYzfIwEIHyONWvVa1mI8Xt4/qkCYUGMXXkG8LFNBtO3y5iPRlLNC6rwId+vH3hN15x5kokeo4gQAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T06:17:24.166266Z","bundle_sha256":"d9e3c793a551fffe42a342d54a9f191973cbfec5a80c7ac8082dc7955094979a"}}