HAW - Next Media - Tile Rechnerei

_.md

[ Launch: HAW - Next Media - Tile Rechnerei ] 5693924 by Salzig

config.json

{"description":"HAW - Next Media - Tile Rechnerei","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01}

inlet.js

console.clear();

var center_long = 9.9649
var center_lat = 53.5496
var zoom = 21

var bounding_long_0 = 9.935
var bounding_long_1 = 9.99
var bounding_lat_0 = 53.5374
var bounding_lat_1 = 53.57

var bounding_long_0_tile = long2tile(bounding_long_0, zoom)
var bounding_long_1_tile = long2tile(bounding_long_1, zoom)

var bounding_lat_0_tile = lat2tile(bounding_lat_0, zoom)
var bounding_lat_1_tile = lat2tile(bounding_lat_1, zoom)

console.log("BoundingBox Long 0 Tile:",bounding_long_0_tile);
console.log("BoundingBox Long 1 Tile:",bounding_long_1_tile);
console.log("BoundingBox Long 0 Long:", tile2long(bounding_long_0_tile, 21))
console.log("BoundingBox Long 1 Long:", tile2long(bounding_long_1_tile, 21))

console.log("BoundingBox Lat 0 Tile:",bounding_lat_0_tile);
console.log("BoundingBox Lat 1 Tile:",bounding_lat_1_tile);
console.log("BoundingBox Lat 0 Lat:", tile2lat(bounding_lat_0_tile, 21))
console.log("BoundingBox Lat 1 Lat:", tile2lat(bounding_lat_1_tile, 21))

console.log("Tiles Wide: ", bounding_long_1_tile - bounding_long_0_tile)
console.log("Tiles High: ", bounding_lat_0_tile - bounding_lat_1_tile)

function long2tile(lon,zoom) { 
  return (Math.floor((lon+180)/360*Math.pow(2,zoom))); 
}
function lat2tile(lat,zoom)  { 
  return (Math.floor((1-Math.log(Math.tan(lat*Math.PI/180) + 1/Math.cos(lat*Math.PI/180))/Math.PI)/2 *Math.pow(2,zoom))); 
}
function tile2long(x,z) {
  return (x/Math.pow(2,z)*360-180);
}
function tile2lat(y,z) {
  var n=Math.PI-2*Math.PI*y/Math.pow(2,z);
  return (180/Math.PI*Math.atan(0.5*(Math.exp(n)-Math.exp(-n))));
}