South Korea Maps

This repo hosts South Korea administrative division geodata in open formats that can be used to build static and interactive maps (e.g. with D3), and was inspired by swiss-maps.

To see maps for Seoul, go to https://github.com/southkorea/seoul-maps

Description

Formats

The following formats are available: shp, kml/kmz, svg, GeoJSON, TopoJSON, and RData.

Sources

Data is acquired from the following sources:

KOSTAT: Administrative division geodata for Census (센서스용 행정구역경계), 2011|2012}2013
GADM: Global administrative areas
POPONG: Hand-traced (for production)
Wikimedia: Administrative divisions map of South Korea

Levels

South Korean administrative divisions are consisted of three levels:

Provinces (시도): Special City(특별시), Metropolitan City(광역시), Province(도), Special Self-governing Province(특별자치도), Special Self-governing City(특별자치시)
Municipalities (시군구): Si (시, city), Gun (군, county), Gu (구, district)
Submunicipalities (읍면동): Eup (읍, town), Myeon (면, township), Dong (동, neighborhood), Ri (리, village)
Precinct (선거구): TBA

Data

The following data are available.
Numbers are data sizes in Megabytes in the following order: Country border, Provinces, Municipalities, Submunicipalities. Numbers in parentheses are simplified versions of each format.

Format \ Source	KOSTAT (2013)	GADM	POPONG	Wikimedia
ESRI Shapefile	0, 9.6, 19, 46	5.5, 5.5, 5.8, 0	0	0
KML/KMZ	0, 0.16, 0.452, 2.8	1.5, 1.5, 1.7, 0	0	0
SVG	0	0	0, 0.014, 0, 0	0, 0, 0.100, 0
GeoJSON	0, 31, 52, 0 (0, 0.148, 0.364, 1.7)	15, 15, 16, 0	0	0
TopoJSON	0, 1.2, 2.0, 4.9 (0, 0.032, 0.0.96, 0.812)	1.5, 1.5, 1.6, 0	0	0
RData	0	1.0, 1.0, 1.2, 0	0	0

Development Notes

Requirements

brew install gdal
npm install -g topojson

KOSTAT (2013)

Download Shapefiles

Projection files are provided here. Otherwise, copy the snippet below and save to a separate prj file having the same name as the shp file.

  PROJCS["Bessel_1841_Transverse_Mercator",GEOGCS["GCS_Bessel_1841",DATUM["D_Bessel_1841",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",200000.0],PARAMETER["False_Northing",500000.0],PARAMETER["Central_Meridian",127.0028902777778],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",38.0],UNIT["Meter",1.0]]

CRS: Korean 1985 / Modified Central, EPSG:5174
Data encoding: EUC-KR

Downloaded dates
- 2011 version: Downloaded on Mar 2013.
- 2012 version: Downloaded on Feb 2015.
- 2013 version: Downloaded on May 2015.

Download and install QGIS. With QGIS for each shapefile:
1. Change layer encoding to EUC-KR
2. Save as, with CRS and data encoding as shown in the image below.
  - Change CRS from Korean 1985 / Modified Central, EPSG:5174 to WGS84, EPSG:4326
  - Change data encoding from System to UTF8

Convert shp to GeoJSON, TopoJSON

 ogr2ogr -f geojson [geojson_file] [shp_file]
 topojson -p -o [topojson_file] [geojson_file]

Simplify GeoJSONs with http://mapshaper.org/ (with Visvalingam / weighted area, 1% simplification)

Convert simplifies GeoJSONs to KML

 ogr2ogr -f kml [simplified_geojson_file] [kml_file]

GADM

Shapefile, KMZ, RData

To download data files, run:

make get_gadm

GeoJSON

Created from shapefiles with ogr2ogr -f geojson [filename]-geo.json [filename].shp.

TopoJSON

Created from GeoJSON files with topojson [filename]-geo.json -o [filename]-topo.json --properties.

Wikimedia

SVG

To download file, run:

wget http://upload.wikimedia.org/wikipedia/commons/7/77/Administrative_divisions_map_of_South_Korea.svg

Examples

대한민국 시군구 지도 (KOSTAT KML, 2013)
우리나라 시군구별 인구밀도 시각화 (KOSTAT TopoJSON, 2012)
우리나라 도시별 인구수 시각화 (KOSTAT TopoJSON, 2012)
시도 시각화 (POPONG SVG)
시도 시각화 (GADM TopoJSON)
시군구 시각화 (GADM TopoJSON)
...add yours to this list!

threadbuilder/southkorea-maps