Tagged articles

Map Projections

3 articles · Page 1 of 1

Sep 12, 2026 · Frontend Development

Why Web Mercator Still Rules Digital Maps: The 2005 Hack That Became a Global Standard

The article explains how Google Maps' 2005 decision to tile the world using a spherical Mercator projection cut at 85.05° latitude created the Web Mercator standard (EPSG:3857) that persists today because its angle-preserving property and square tile pyramid are essential for navigation and efficient rendering, making it irreplaceable despite UN advocacy for equal-area projections.

Conformal ProjectionEPSG:3857Google Maps

0 likes · 8 min read

Why Web Mercator Still Rules Digital Maps: The 2005 Hack That Became a Global Standard

ELab Team

Jan 30, 2023 · Fundamentals

Understanding Map Projections: From Geographic to Web Mercator and Tile Services

This article explains the fundamentals of geographic and projected coordinate systems, details the Mercator and Web Mercator projections, introduces EPSG standards, discusses China's GCJ02 and BD09 offsets, and describes common GIS data services and tile‑based rendering techniques.

Coordinate SystemsGISMap Projections

0 likes · 19 min read

Understanding Map Projections: From Geographic to Web Mercator and Tile Services

Caiyun Tech Team

Dec 30, 2022 · Fundamentals

Understanding Map Projections, Coordinate Systems, and Tile Generation

The article explains why flat maps require projections, compares conformal, equal‑area and equidistant methods, describes the WGS84 datum and the GCJ‑02 “Mars” offset, outlines modern Web Mercator tiling standards, and shows how Python libraries like mercantile, pygrib, xarray, GDAL and rasterio can be used to read gridded data and produce map tiles.

Coordinate SystemsGDALGIS

0 likes · 14 min read

Understanding Map Projections, Coordinate Systems, and Tile Generation