GIS and local information

[babayoshihiko]

gis.Rmd (28 GIS basics)

Geographic Information System (GIS) is geography-dependent, i.e. the national/local governments may maintain their coordinate systems and provide data such as national census and buildings. I suggest adding local information to the Japanese version of GIS.Rmd.

Key terms

Visualizing spatial data {.unnumbered}

CRS used in Japan

* Japan Plane Rectangular CS I to XIII, EPSG: 2443-2455
* JGD2011 GRS80 ellipsoid, EPSG:6668

Getting started with GIS

GIS data available for Japan

*  [Census](http://e-stat.go.jp/SG2/eStatGIS/page/download.html) population by address
*  [Suuchi](http://nlftp.mlit.go.jp/ksj/) - a variety of features (e.g. hospitals, schools, school districts)
*  [Kiban](http://www.gsi.go.jp/kiban/etsuran.html) - e.g. building and road edges
*  [Geospatial Japan](https://www.geospatial.jp/ckan/dataset) - a portal of GIS data by local governments and others

Preparation

Sample case data

In the code, the SRID=4326 is used. This is mainly for USA. Japanese government has maintained its own coordinate system and revised in 2000 and 2011 (after the Great East Japan Earthquake).

| Coordinates | EPSG | Region |
| :--- | :--- | :------- |
| lat/lon | 4326 | US |
| lat/lon | 3857 | Web |
| lat/lon | 4612 | Japan (JGD2000) |
| lat/lon | 6668 | Japan (JGD2011) |

[nsbatra]

Hello babayoshihiko!
First, I want to thank you for your translation and contribution to this project! We deeply appreciate your time.

Currently, our primary objective is to finish the translation as the book is written. Then we can implement revisions and consider changes such as localisation of the data and code. For your information, revisions for the next epiRhandbook version are being tracked in the Issues of the English version - feel free to note any typos/additions/corrections there.

This is a very relevant point that you raise. Please feel free to add the text above describing the Japanese and other CRS, and links to Japanese data.

Tagging GIS page authors @yuriei @ishaberry @ebuajitti and @aspina7 in case they want to comment.
Also tagging @hitomik723 for awareness.