China's Great Wall is longer than thought

The Great Wall of China is even greater than once thought.

A two-year government mapping study has uncovered new sections of the ancient Chinese monument that total about 180 miles, according to a report posted on the State Bureau of Surveying and Mapping website.

Using mapping technologies such as infrared range finders and GPS devices, experts discovered portions of the wall — concealed by hills, trenches and rivers — that stretch from Hu Mountain in northern Liaoning province to Jiayu Pass in western Gansu province, the official China Daily reported today.



The newly mapped parts of the wall were built during the Ming Dynasy (1368-1644) to protect against northern invaders and were submerged over time by sandstorms that moved across the arid region, the study said.



The additional parts mean the Great Wall — which Chinese emperors began constructing 2,000 years ago to keep out Monguls and invaders — spans about 3,900 miles through the northern part of the country.



The joint project, conducted by the State Administration of Cultural Heritage and State Bureau of Surveying and Mapping, will continue for another year in order to map sections of the wall built during the Qin (221 BC-206 BC) and Han (206 BC-9 AD) Dynasties, the report said.



Recent studies by Chinese archaeologists have shown that sections of the wall in Gansu are being reduced to "mounds of dirt" by sandstorms and may disappear entirely in 20 years. They blamed destructive farming methods in the 1950s that desertified large areas of northern China. In addition, portions of the wall in Gansu were made of packed earth, which proved less resilient that brick and stone used in much of the wall's construction.



China in recent years has begun restoring parts of the wall as well as trying to rein in commercial development on and around it.



The wall's modern sections around the Chinese capital date from the Ming Dynasty, including those restored since the Communist Party took power in 1949, and several areas — including the most popular, Badaling, just north of Beijing — draw hundreds of thousands of visitors each year.



Tourist encroachment also has been a problem in recent years, with state media saying that near Badaling almost every brick on a popular section of the wall has been carved with people's names or other graffiti.

Suggested Topics
Start your day with The Independent, sign up for daily news emails
News
Sir David Attenborough
people
Life and Style
Young girl and bowl of cereal
food + drink
Arts and Entertainment
'The Archers' has an audience of about five million
radioA growing number of listeners are voicing their discontent; so loudly that even the BBC's director-general seems worried
News
Comic miserablist Larry David in 'Curb Your Enthusiasm'
peopleDirector of new documentary Misery Loves Comedy reveals how he got them to open up
PROMOTED VIDEO
Have you tried new the Independent Digital Edition apps?
ebooks
ebooksA year of political gossip, levity and intrigue from the sharpest pen in Westminster
Arts and Entertainment
Henry VIII played by Damien Lewis
tvReview: Scheming queens-in-waiting, tangled lines of succession and men of lowly birth rising to power – sound familiar?
Sport
football
News
i100
Life and Style
Virtual reality headset: 'Essentially a cinema screen that you strap to your face'
techHow virtual reality is thrusting viewers into frontline of global events and putting film-goers at the heart of the action
Arts and Entertainment
Ready to open the Baftas, rockers Kasabian are also ‘great film fans’
musicExclusive: Rockers promise an explosive opening to the evening
Life and Style
David Bowie by Duffy
fashion
Arts and Entertainment
Hell, yeah: members of the 369th Infantry arrive back in New York
booksWorld War Z author Max Brooks honours WW1's Harlem Hellfighters in new graphic novel
News
advertisingVideo: The company that brought you the 'Bud' 'Weis' 'Er' frogs and 'Wasssssup' ads, has something up its sleeve for Sunday's big match
Arts and Entertainment
tv
News
i100
Environment
Dame Vivienne Westwood speaking at a fracking protest outside Parliament on Monday (AP)
environment
Life and Style
tech
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs General

Tradewind Recruitment: English Teacher

Negotiable: Tradewind Recruitment: This post arises as a result of the need to...

Tradewind Recruitment: Class Teacher Required ASAP In Uminster

£120 - £150 per annum: Tradewind Recruitment: I am recruiting on instruction o...

Ashdown Group: Head of Finance - Financial Director - London - £70,000

£70000 per annum: Ashdown Group: Head of Finance - Financial Controller - Fina...

Ashdown Group: Marketing Executive - Wimbledon, SW London

£24000 - £28000 per annum + benefits: Ashdown Group: Marketing Executive - Wim...

Day In a Page

Isis hostage crisis: Militant group stands strong as its numerous enemies fail to find a common plan to defeat it

Isis stands strong as its numerous enemies fail to find a common plan to defeat it

The jihadis are being squeezed militarily and economically, but there is no sign of an implosion, says Patrick Cockburn
Virtual reality thrusts viewers into the frontline of global events - and puts film-goers at the heart of the action

Virtual reality: Seeing is believing

Virtual reality thrusts viewers into the frontline of global events - and puts film-goers at the heart of the action
Homeless Veterans appeal: MP says Coalition ‘not doing enough’

Homeless Veterans appeal

MP says Coalition ‘not doing enough’ to help
Larry David, Steve Coogan and other comedians share stories of depression in new documentary

Comedians share stories of depression

The director of the new documentary, Kevin Pollak, tells Jessica Barrett how he got them to talk
Has The Archers lost the plot with it's spicy storylines?

Has The Archers lost the plot?

A growing number of listeners are voicing their discontent over the rural soap's spicy storylines; so loudly that even the BBC's director-general seems worried, says Simon Kelner
English Heritage adds 14 post-war office buildings to its protected lists

14 office buildings added to protected lists

Christopher Beanland explores the underrated appeal of these palaces of pen-pushing
Human skull discovery in Israel proves humans lived side-by-side with Neanderthals

Human skull discovery in Israel proves humans lived side-by-side with Neanderthals

Scientists unearthed the cranial fragments from Manot Cave in West Galilee
World War Z author Max Brooks honours WW1's Harlem Hellfighters in new graphic novel

Max Brooks honours Harlem Hellfighters

The author talks about race, legacy and his Will Smith film option to Tim Walker
Why the league system no longer measures up

League system no longer measures up

Jon Coles, former head of standards at the Department of Education, used to be in charge of school performance rankings. He explains how he would reform the system
Valentine's Day cards: 5 best online card shops

Don't leave it to the petrol station: The best online card shops for Valentine's Day

Can't find a card you like on the high street? Try one of these sites for individual, personalised options, whatever your taste
Diego Costa: Devil in blue who upsets defences is a reminder of what Liverpool have lost

Devil in blue Costa is a reminder of what Liverpool have lost

The Reds are desperately missing Luis Suarez, says Ian Herbert
Ashley Giles: 'I'll watch England – but not as a fan'

Ashley Giles: 'I'll watch England – but not as a fan'

Former one-day coach says he will ‘observe’ their World Cup games – but ‘won’t be jumping up and down’
Greece elections: In times like these, the EU has far more dangerous adversaries than Syriza

Greece elections

In times like these, the EU has far more dangerous adversaries than Syriza, says Patrick Cockburn
Holocaust Memorial Day: Nazi victims remembered as spectre of prejudice reappears

Holocaust Memorial Day

Nazi victims remembered as spectre of prejudice reappears over Europe
Fortitude and the Arctic attraction: Our fascination with the last great wilderness

Magnetic north

The Arctic has always exerted a pull, from Greek myth to new thriller Fortitude. Gerard Gilbert considers what's behind our fascination with the last great wilderness