neogis-de

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.

neogis-de

OpenLayers.Util.QuickHull = (function() {
    var buildConvexHull = function (baseLine, points, allBaseLines) {
            var convexHullBaseLines = [],
                maxDistance = 0,
                maxPoint = [],
                newPoints = [],
                point, distance, i, vY, vX;
            for (i = 0; i < points.length; i++) {
                point = points[i];
                vY = baseLine[1][0] - baseLine[0][0];

neogis-de

CREATE TABLE public.testpolygons1
(
  gid serial PRIMARY KEY,
  geom geometry(Polygon,3857)
);

CREATE TABLE public.testpolygons2
(
  gid serial PRIMARY KEY,
  geom geometry(Polygon,3857)

neogis-de

BEGIN;

-------------------------------------------------------

-- CREATE test tables

CREATE TABLE label_point (
gid serial NOT NULL,
geom geometry(point, 3857),
label_sample varchar(255),

neogis-de

import pprint
import operator
plugin_load_times= qgis.utils.plugin_times
sorted_load_times = sorted(plugin_load_times.items(), key=operator.itemgetter(1))
pprint.pprint(sorted_load_times)

# in addition to: https://gis.stackexchange.com/questions/209129/how-to-tell-which-qgis-plugins-are-slow-to-load?stw=2
# helpt to sort dictionary from: https://stackoverflow.com/questions/613183/sort-a-python-dictionary-by-value