BD09 (Q29043632)

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Baidu's Coordinate system based on GCJ02. Include two different variants, BD-09ll and BD-09mc, where BD-09ll is a coordinate system based on degree for end users while BD-09mc is a meter-based system based on Mercator projection for Baidu SDK users.

BD-09
BD-09mc
BD-09ll

Language	Label	Description	Also known as
English	BD09	Baidu's Coordinate system based on GCJ02. Include two different variants, BD-09ll and BD-09mc, where BD-09ll is a coordinate system based on degree for end users while BD-09mc is a meter-based system based on Mercator projection for Baidu SDK users.	BD-09 BD-09mc BD-09ll

Statements

geodetic reference system

1 reference

imported from Wikimedia project

English Wikipedia

spatial reference system

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software obfuscation

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restrictions on geographic data in China

0 references

0 references

Mercator projection

1 reference

https://developer.baidu.com/map/changeposition.htm

1 reference

https://developer.baidu.com/map/changeposition.htm

defining formula

\phi _{b}=r\times \cos(t)+0.0065;\theta _{b}=r\times \sin(t)+0.0060

measurement scale

1 reference

https://archive.fo/20170328042729/https://github.com/caijun/geoChina/blob/5c6284b/R/cst.R

t={\rm {atan2}}(\phi _{g},\theta _{g})+0.000003\times \cos(3000\theta _{g})

measurement scale

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r={\sqrt {{\rm {degrees}}(\phi _{g})^{2}+{\rm {degrees}}(\theta _{g})^{2}}}+0.00002\times \cos(3000\phi _{g})

measurement scale

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official website

https://developer.baidu.com/map/changeposition.htm

language of work or name

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maintained by WikiProject

WikiProject Mathematics

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Sitelinks

Wikipedia(0 entries)

Wikibooks(0 entries)

Wikinews(0 entries)

Wikiquote(0 entries)

Wikisource(0 entries)

Wikiversity(0 entries)

Wikivoyage(0 entries)

Wiktionary(0 entries)

Multilingual sites(0 entries)

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