Jan Marsch kekscom

kekscom / gist:6829920

Created October 4, 2013 17:54

soldner to wgs84 for soldner coordinates 26197,19294

	var proj = require("proj4");
	proj.defs("EPSG:3068", "+proj=cass +lat_0=52.41864827777778 +lon_0=13.62720366666667 +x_0=40000 +y_0=10000 +ellps=bessel +datum=potsdam +units=m +no_defs");
	console.log(proj("EPSG:3068", "WGS84", [26197,19294]));

kekscom / gist:5367764

Created April 11, 2013 22:38

hatching test in canvas, see it in action: http://jsfiddle.net/S5aAY/

	// <canvas>

	var w = 600, h = 300;

	var canvas = document.getElementsByTagName('CANVAS')[0];
	canvas.width = w;
	canvas.height = h;

	var context = canvas.getContext('2d');

kekscom / gist:5053306

Last active May 11, 2025 06:35

JavaScript toLocalISOString() function

	function toLocalISOString(d) {
	var off = d.getTimezoneOffset();
	return new Date(d.getFullYear(), d.getMonth(), d.getDate(), d.getHours(), d.getMinutes() - off, d.getSeconds(), d.getMilliseconds()).toISOString();
	}

kekscom / Thick Line to Polygon JS

Created December 3, 2012 10:43

A JavaScript method to turn thick lines into polygons

	/**
	* @author Jan Marsch (@kekscom)
	* @example see http://jsfiddle.net/osmbuildings/2e5KX/5/
	* @example thickLineToPolygon([{x:50,y:155}, {x:75,y:150}, {x:100,y:100}, {x:50,y:100}], 20)
	* @param polyline {array} a list of point objects in format {x:75,y:150}
	* @param thickness {int} line thickness
	*/

	var thickLineToPolygon = (function () {
	function getOffsets(a, b, thickness) {

kekscom / BulkInsert.js

Created July 9, 2012 19:54

MySQL bulk Insert

	/**
	This little helper creates bulk SQL insert queries like this:

	INSERT INTO mytable (id, col1, col2) VALUES
	(1, "col1value", "col2value"),
	(2, "col1value", "col2value"),
	(3, "col1value", "col2value"),
	:
	:
	(4999, "col1value", "col2value"),