Initial commit.

Author: mbostock

.gitignore

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+zip
+geo
+shp
+topo
+node_modules

Makefile

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+TOPOJSON = ./node_modules/topojson/bin/topojson
+
+COLLECTIONS = \
+	ne_10m_admin_0_countries \
+	ne_10m_admin_0_countries_lakes
+
+all: node_modules $(addprefix topo/,$(addsuffix .json,$(COLLECTIONS)))
+
+node_modules:
+	npm install
+
+zip/%.zip:
+	mkdir -p $(dir $@) && curl "http://www.nacis.org/naturalearth/$*.zip" -o $@.download && mv $@.download $@
+
+# Admin 0 – countries (8.4M)
+shp/ne_10m_admin_0_countries.shp: zip/10m/cultural/ne_10m_admin_0_countries.zip
+	mkdir -p $(dir $@) && unzip -d shp $< && touch $@
+
+# Admin 0 – countries without boundary lakes (8.6M)
+shp/ne_10m_admin_0_countries_lakes.shp: zip/10m/cultural/ne_10m_admin_0_countries_lakes.zip
+	mkdir -p $(dir $@) && unzip -d shp $< && touch $@
+
+geo/%.json: shp/%.shp
+	mkdir -p geo && rm -f $@ && ogr2ogr -f GeoJSON $@ $<
+
+topo/%.json: geo/%.json
+	mkdir -p $(dir $@) && $(TOPOJSON) -o $@ -- $<

README.md

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+# World Atlas TopoJSON
+
+This repository provides a convenient mechanism for generating TopoJSON files from [National Earth](http://naturalearthdata.com/).
+
+## Installing via Homebrew
+
+Before you can run `make`, you’ll need to install Node.js. Here’s how to do that using [Homebrew](http://mxcl.github.com/homebrew/) on Mac OS X:
+
+```bash
+brew install node
+```
+
+And then, from this repository’s root directory, install the dependencies:
+
+```bash
+npm install
+```
+
+If you want to install this software using an alternate method see the website for [TopoJSON](https://github.com/mbostock/topojson). I also recommend reading my tutorial, [Let’s Make a Map](http://bost.ocks.org/mike/map/).
+
+## Generating TopoJSON
+
+Once you have everything installed, simply run:
+
+```
+make
+```
+
+This will generate various TopoJSON files in the `topo` directory. As a by-product of producing these files, you’ll also download the shapefiles directly from National Earth and convert them into GeoJSON and filter.
+
+If you want to generate a custom map, I recommend modifying the Makefile. Or, just use the Makefile as a set of examples, and run the appropriate `ogr2ogr` and `topojson` commands from the terminal.

package.json

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+{
+  "name": "world-atlas",
+  "version": "0.0.1",
+  "description": "Roll your own TopoJSON from Natural Earth.",
+  "keywords": [
+    "topojson",
+    "geojson",
+    "shapefile"
+  ],
+  "author": {
+    "name": "Mike Bostock",
+    "url": "http://bost.ocks.org/mike"
+  },
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/mbostock/world-atlas.git"
+  },
+  "devDependencies": {
+    "topojson": ">= 0.0.15"
+  }
+}