Type of site
Baidu Maps is a desktop and mobile web mapping service application and technology provided by Baidu, offering satellite imagery, street maps, street view ("Panorama" - zh:百度全景) and indoor view perspectives, as well as functions such as a route planner for traveling by foot, car, or with public transport. Android and iOS applications are available.
Baidu Maps is available only in the Chinese language and, before 2016, it offered only maps of mainland China, Hong Kong, Macau and Taiwan, with the rest of the world appearing unexplored. Currently Baidu Maps also offers maps of various other countries. It was reported that more than 150 countries would be supported by the end of 2016. Baidu uses map data supplied by NavInfo, MapKing, Here, LocalKing and OpenStreetMap.
Countries and territories supported
Within Mainland China
Outside Mainland China
- French Guiana
- Hong Kong
- New Zealand
- Solomon islands
- South Africa
- South Korea
- Sri Lanka
- United Arab Emirates
- United States
- September 2005 - Baidu Maps is released
- 2010 - Baidu adds a unique, highly detailed 3D view for select cities, very similar to the computer game SimCity. The images are licensed from digital mapping service Edushi. Cities being currently covered include Beijing, Shanghai, Guangzhou and Shenzhen.
- November 2011 - Baidu launches satellite imagery for the Greater China region with much better resolution than Google Maps City-level only includes Beijing, Shanghai, Guangzhou, Shenzhen, Hong Kong, Macao and other major cities.
- September 3, 2012 - at its annual Baidu World event, Baidu reveals 360-degree digital imagery for select buildings
Baidu Maps uses a variant of web Mercator projection for slicing map data into tiles, with distances expressed in degrees. It's associated with an underlying latitude-longitude reference. However, the reference uses the BD-09 coordinate system, which adds further obfuscation to the already obscure national standard in China, GCJ-02 (which in turn is defined in terms of the de facto standard around the world, WGS 84). Baidu alleges that adopting BD-09 "protects users' privacy".
BD-09's lat-lon coordinates are derived by scrambling a polar version of GCJ-02 coordinates and adding a fixed offset:
from cmath import polar, rect from math import sin, cos, pi # Represent coordinates with complex numbers for simplicity coords = complex # baidu assumes x/real: lon; y/imag: lat here. def gcj_bd(gcj: coords) -> coords: r, θ = polar(gcj) r += 2e-5 * sin(gcj.imag * pi * 3000 / 180) θ += 3e-6 * cos(gcj.real * pi * 3000 / 180) return rect(r, θ) + (0.0065 + 0.006j)
Street view service
The street view service of Baidu Maps was first launched on August 21, 2013. This is a list of cities supported as of March 11, 2015:
In June 2020, the Indian Government blocked Baidu Maps, as well as 58 other Chinese apps, citing national security concerns. That came after clashes between the People's Liberation Army Ground Force and the Indian Army in the Galwan Valley.
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