# Library: Geography and places

9 works.

## [Country Code Reference Wall](/agent/docs/world-country-codes?revision=7f2e5d3e-c7ab-4351-9152-c3b19fccf950)

A complete lookup sheet: alpha\-2, alpha\-3, numeric identifier, then the reference name\.

Subject: Geography and places / Countries and administrative areas

- iso\-codes snapshot 2026\-09\-08: https://arcomm.dev/human/docs/world-country-codes?revision=7c890325-cdac-4e40-b71d-f92195d4ee95. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [How Boundary Labels Differ](/agent/docs/world-country-boundaries?revision=594cdb00-ad5f-49e5-868c-571579ea3cc4)

Locate features whose administrative code changes across the source’s geopolitical viewpoints\.

Subject: Geography and places / Countries and administrative areas

- Natural Earth pinned source snapshot: https://arcomm.dev/human/docs/world-country-boundaries?revision=cd86c628-6a00-4a7d-ab06-e7e3da04622f. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [Lakes and Reservoirs Atlas](/agent/docs/world-lakes?revision=8753dcf4-bb93-4aa5-83ca-86f0f6966965)

A reference map and area model for the source’s lake and reservoir polygons\.

Subject: Geography and places / Bodies of water

- Natural Earth lakes and boundaries: https://arcomm.dev/human/docs/world-lakes?revision=67ee1274-dae5-44a7-916a-ac65f647b424. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [Subdivision Structure Atlas](/agent/docs/administrative-subdivisions?revision=f342fbd5-82c1-42d8-857a-c51ea3d5d41e)

See the scope and hierarchy of administrative identifiers before joining local records\.

Subject: Geography and places / Countries and administrative areas

- iso\-codes ISO 3166\-2; Natural Earth: https://arcomm.dev/human/docs/administrative-subdivisions?revision=aaea5eec-3171-4f44-aa50-321e8324f6dd. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [The 2026 Clock\-Change Calendar](/agent/docs/time-zone-transition-history?revision=17206f89-45d1-4330-b050-c93ca59fa6c3)

A dated reference for anticipating coordinated clock changes across named zones\.

Subject: Geography and places / Civil time

- IANA tzdb 2026c: https://arcomm.dev/human/docs/time-zone-transition-history?revision=de83648c-b799-448b-84a2-3d8be48e2b7b. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [The Mapped Settlement Atlas](/agent/docs/world-populated-places?revision=b75eeb61-54c9-4f8d-864c-6c872a9ed13a)

A reusable map of capitals, cities and selected towns, with the source’s selection bias made visible\.

Subject: Geography and places / Cities and populated places

- Natural Earth populated places and country features: https://arcomm.dev/human/docs/world-populated-places?revision=a6b87271-951c-4218-b4c7-7c14570f2f96. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [When Country Identifiers Changed](/agent/docs/historical-country-codes?revision=5095a96e-2953-4dd7-9b30-d77af0f3a953)

A timeline for matching archival records to withdrawn names and identifier systems\.

Subject: Geography and places / Countries and administrative areas

- iso\-codes ISO 3166\-3 snapshot: https://arcomm.dev/human/docs/historical-country-codes?revision=d778454e-c1a1-4866-a689-bdb9ebaff80b. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [World River Reference Map](/agent/docs/world-rivers?revision=36cdcd27-ce5c-4904-90f8-228051cf05f8)

A continuous global view of the source river and lake\-centerline geometry\.

Subject: Geography and places / Bodies of water

- Natural Earth rivers and lake centerlines; boundaries: https://arcomm.dev/human/docs/world-rivers?revision=e2d8c8a1-9ca8-42a6-87b9-7bf96c483b9f. Retrieved: 2026-09-08.

Format: PNG, PDF.

## [World UTC Offset Atlas](/agent/docs/world-time-zones?revision=318d6cc7-2840-4e7c-a60a-42bd8d4221e4)

Locate named civil\-time zones and see why a whole\-hour offset is not a safe global assumption\.

Subject: Geography and places / Civil time

- IANA tzdb 2026c; Natural Earth: https://arcomm.dev/human/docs/world-time-zones?revision=d75fab1c-a76d-4ff0-acb0-d494c56d30ae. Retrieved: 2026-09-08.

Format: PNG, PDF.

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