Add some documentation. Add a Makefile.

Add a README.md. Add a generate.rb script.

Makefile

@@ -3,4 +3,4 @@ get:
 convert:
 	ruby generate.rb | tippecanoe -f -o a.pmtiles --minimum-zoom=3 --maximum-zoom=14 --base-zoom=14 \
 	-r2.0 --drop-densest-as-needed
-
+	

README.md

@@ -3,8 +3,14 @@ address_all (Address Base Registry from Digital Agency of Japan) in vector tiles
 
 ![social preview image](https://user-images.githubusercontent.com/18297/280753506-253f479f-b191-42e6-b1d4-3ff7c5fc4ed6.jpg)
 
-# Source data
-[全アドレスデータ from デジタル庁　レジストリカタログ](https://catalog.registries.digital.go.jp/rc/dataset/ba000001/resource/b535cd16-b477-4e5d-81c8-1eb116c97b2f)
+## Introduction
+This repository contains the address_all dataset, which is the Address Base Registry from the Digital Agency of Japan. The dataset is provided in vector tiles format.
 
-# About social preview image
-It is [Watercolor portrait of Ada King, Countess of Lovelace (Ada Lovelace)](https://ja.wikipedia.org/wiki/%E3%82%A8%E3%82%A4%E3%83%80%E3%83%BB%E3%83%A9%E3%83%96%E3%83%AC%E3%82%B9#/media/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Ada_Lovelace_portrait.jpg) (pubic domain)
+## Usage
+To use this dataset, you can download the vector tiles from the provided link and integrate them into your mapping application. The dataset includes detailed address information for locations in Japan.
+
+## Source Data
+The source data for this dataset can be found at [全アドレスデータ from デジタル庁　レジストリカタログ](https://catalog.registries.digital.go.jp/rc/dataset/ba000001/resource/b535cd16-b477-4e5d-81c8-1eb116c97b2f). It is a comprehensive collection of address data maintained by the Digital Agency of Japan.
+
+## Social Preview Image
+The social preview image used for this repository is a watercolor portrait of Ada King, Countess of Lovelace (Ada Lovelace). The image is in the public domain and can be found [here](https://ja.wikipedia.org/wiki/%E3%82%A8%E3%82%A4%E3%83%80%E3%83%BB%E3%83%A9%E3%83%96%E3%83%AC%E3%82%B9#/media/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Ada_Lovelace_portrait.jpg).

generate.rb

@@ -1,9 +1,16 @@
+# This script reads a zip file containing CSV files and generates GeoJSON data for each "pos" file.
+# It uses the 'zip', 'stringio', and 'json' libraries.
+# The main function is 'jump_into', which recursively jumps into nested zip files and processes the "pos" files.
+# The generated GeoJSON data is printed to the console.
+
 require 'zip'
 require 'stringio'
 require 'json'
 
 SRC_PATH = 'address_all.csv.zip'
 
+# Recursively jumps into nested zip files and processes the "pos" files.
+# @param [Zip::InputStream] stream - The input stream of the zip file
 def jump_into(stream)
   while entry = stream.get_next_entry
     if /.zip$/.match(entry.name.downcase)
@@ -40,6 +47,7 @@ def jump_into(stream)
   end
 end
 
+# Open the zip file and call the 'jump_into' function to process the files
 Zip::InputStream.open(File.open(SRC_PATH)) {|stream|
   jump_into(stream)
 }