Benjamin Gudehus hastebrot

The difference between XYZ and TMS tiles and how to convert between them

Lots of tile-based maps use either the XYZ or TMS scheme. These are the maps that have tiles ending in /0/0/0.png or something. Sometimes if it's a script, it'll look like &z=0&y=0&x=0 instead. Anyway, these are usually maps in Spherical Mercator.

Good examples are OpenStreetMap, Google Maps, MapBox, MapQuest, etc. Lots of maps.

Most of those are in XYZ. The best documentation for that is slippy map tilenames on the OSM Wiki, and Klokan's Tiles a la Google.

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

LevelDB is Google's embedded key/value store that uses similar design concepts as the BigTable Tablet

	import javafx.application.*;
	import javafx.beans.value.*;
	import javafx.geometry.*;
	import javafx.scene.Scene;
	import javafx.scene.control.*;
	import javafx.scene.image.*;
	import javafx.scene.layout.*;
	import javafx.stage.Stage;

	/**

	#!/bin/bash

	if [ "$#" -ne 1 ] ; then
	echo "Usage: $0 <title>" >&2
	exit 1
	fi


	title=`echo "$1" \|sed 's/ /-/g'`
	fileName="_posts/`date +%Y-%m-%d-$title.markdown`"

	//#!/usr/bin/env groovy

	import groovy.json.JsonSlurper
	import java.text.SimpleDateFormat

	// fetches a Github API URL and parses the result as JSON
	def fetch(addr, params = [:]) {
	def auth = "<personal api token>"
	def json = new JsonSlurper()
	return json.parse(addr.toURL().newReader(requestProperties: ["Authorization": "token ${auth}".toString(), "Accept": "application/json"]))

	(ns extend-core-logic.core
	(:require [clojure.core.logic :refer :all]
	[clojure.core.logic.protocols :refer [walk]]
	[clojure.java.io :as jio]
	[clojure.string :as string])
	(:import [java.io BufferedReader StringReader]))

	;; from: http://federalgovernmentzipcodes.us/
	(defn load-db []
	(let [data (java.io.BufferedReader. (java.io.StringReader. (slurp "/Users/tim/Downloads/free-zipcode-database.csv")))

	class Event<T> {
	private val handlers = arrayListOf<(Event<T>.(T) -> Unit)>()
	fun plusAssign(handler: Event<T>.(T) -> Unit) { handlers.add(handler) }
	fun invoke(value: T) { for (handler in handlers) handler(value) }
	}

	val e = Event<String>() // define event

	fun main(args : Array<String>) {
	e += { println(it) } // subscribe

Benjamin Gudehus hastebrot

Python 2.x

Code

Projects

	trait Disposable {
	fun dispose()
	}

	fun using(value : Disposable, body : ()->Unit) {
	try {
	body()
	} finally {
	value.dispose()
	}

	pub fn main() {
	let f = action(floats(), p);
	let parser = spaces() << string_s("vertex") << string_s("[") <<
	f << spaces() << f << spaces() << f << spaces() << string("]");

	let input = ParserInput::new(std::os::args()[1]);
	let result = parser.parse(&input);
	}