Historical border GeoJSON in this folder
=========================================

Source : historical-basemaps by AOUREDNÍK
         https://github.com/aourednik/historical-basemaps
Repository license: GNU GPL version 3 (GPL-3.0)
         https://github.com/aourednik/historical-basemaps/blob/master/LICENSE
Local full license: /borders/LICENSE-GPL-3.0.txt
Rights/source check: 2026-10-11 (Asia/Seoul)

The repository's LICENSE is retained here, not replaced by a claim of public
domain or a different data licence. An upstream request to clarify the licence's
application to the GeoJSON data is still open at the time of this check:
https://github.com/aourednik/historical-basemaps/issues/74
No separate licence permission or project-wide legal clearance is claimed.

Files (13개 시대 → 7개 국경 파일, 인접 시대는 가장 가까운 연도 재사용):
  world_bc2000.geojson  (약 BC 2000) — primeval, patriarchs
  world_bc1500.geojson  (약 BC 1500) — exodus, conquest
  world_bc1000.geojson  (약 BC 1000) — united-monarchy
  world_bc700.geojson   (약 BC 700)  — divided-monarchy, exile (앗수르·바벨론)
  world_bc500.geojson   (약 BC 500)  — return (아케메네스 페르시아)
  world_bc100.geojson   (약 BC 100)  — intertestamental (헬라·하스몬→로마 공화국)
  world_100.geojson     (약 AD 100)  — life-of-jesus, early-church,
                                       paul-journeys, revelation (로마 제국)

world_bc1500/bc1000/bc700/bc500/bc100.geojson은 원본을 그대로 받은 뒤,
지도 폴리곤이 하나라도 lng -10~60 / lat 10~50 박스에 걸치는 feature만
남기고 나머지(먼 대륙의 문화권)는 제거해 용량을 줄였다
(원본 약 860~960KB → 필터 후 130~195KB). 런타임 표시 시에는 별도로
더 좁은 REGION_BBOX(src/data/borders.ts)로 한 번 더 걸러 범례를 정리한다.

The modified GeoJSON files remain available in their human- and machine-editable
source format at the public URLs below, with the GPL notice retained. The filtering
selects whole features; it does not redraw their coordinates. Changes made by
BibleTrip are the feature filtering and removal of unused collection-level
name/crs metadata in five files, plus presentation labels in the application.
The originally downloaded upstream commit was not recorded. Original URLs below
identify the upstream filenames, not a claim that today's upstream revision is
byte-identical to this site's previously downloaded copy.

Public source copies and upstream originals
------------------------------------------
Local file                                  Upstream original
/borders/world_bc2000.geojson (145 features)  https://github.com/aourednik/historical-basemaps/blob/master/geojson/world_bc2000.geojson
/borders/world_bc1500.geojson (32 features)   https://github.com/aourednik/historical-basemaps/blob/master/geojson/world_bc1500.geojson
/borders/world_bc1000.geojson (32 features)   https://github.com/aourednik/historical-basemaps/blob/master/geojson/world_bc1000.geojson
/borders/world_bc700.geojson  (40 features)   https://github.com/aourednik/historical-basemaps/blob/master/geojson/world_bc700.geojson
/borders/world_bc500.geojson  (22 features)   https://github.com/aourednik/historical-basemaps/blob/master/geojson/world_bc500.geojson
/borders/world_bc100.geojson  (34 features)   https://github.com/aourednik/historical-basemaps/blob/master/geojson/world_bc100.geojson
/borders/world_100.geojson   (440 features)   https://github.com/aourednik/historical-basemaps/blob/master/geojson/world_100.geojson

The two unfiltered local copies retain their collection-level name/crs metadata.
All seven data files are deliberately preserved; this rights-notice update does
not edit or remove the geographical data. Redistribution of these copies retains
the upstream GPL-3.0 terms. A site-wide ownership claim does not apply to them.

These are scholarly approximations of historical political boundaries,
used only for the "사건 당시 국경" overlay. Boundaries are illustrative,
not authoritative. Attribution is shown in-app (hist-legend credit).