Split germany.osm into 20 handy chunks with Osmosis and Node.js

split-germany.js

var n = 55.304138,
    e = 15.380859,
    s = 47.040182,
    w =  4.394531;

var width = e - w,
    height = n - s;

console.log("Width: " + width);
console.log("Height: " + height);

var tileWidth = width / 5,
    tileHeight = height / 4;

console.log("Tile width: " + tileWidth);
console.log("Tile height: " + tileHeight);

var exec = require("child_process").exec;
var cwd = process.cwd();

var x, y;
var i = 0,
    j = 0;

var proc_count = 1;

var filename = "";

// Walk horizontally
for (x = w; x < e; x += tileWidth) {
	j = 0;
	for (y = n; y > s; y -= tileHeight) {
		filename = "germany-" + i + "-" + j++ + ".osm";
		exec(cwd + "/osmosis/bin/osmosis "
				+ "--read-xml enableDateParsing=no "
					+ "file=" + cwd + "/germany.osm "
				+ "--bounding-box "
					+ "top=" + y + " "
					+ "left=" + x + " "
					+ "bottom=" + (y - tileHeight) + " "
					+ "right=" + (x + tileWidth) + " "
				+ "--write-xml "
					+ "file=" + cwd + filename,
			function(err, stdout, stderr) {
				console.log(filename);
				console.log("  stdout: " + stdout);
				console.log("  stderr: " + stderr);
				if (error !== null)
					console.log("  exec error: " + error);
			}
		);

		console.log("Initiated split process #" + proc_count++ + ".");
		console.log("  File: " + filename + "\n");
	}
	i++;
}

console.log("Initialization Complete.");