Posts Tagged ‘boundary’

PREVIEW Natural Earth Vector: First Order Admin Units

Monday, July 13th, 2009

We shipped off the 1:15,000,000 scale first-order administrative units for Natural Earth Vector to University of Wisconsin @ Madison to be attributed with country and province names and alpha-numeric codes last week. There are only 3,000+ of these around the world so this is no small task! Kudos go to Tom for doing the heavy lifting on this data theme. Props to Kevin and Ben @ UW-Madison for undertaking the attributing.

Some units are super tiny (see Slovenia in the Europe detail at bottom, almost equivalent in scale to municipalities in the USA). We ignore some small, mostly island nations (see the Caribbean image below) but will include a general admin_0 polygon for the entire country instead. First order administrative units are composed what most people call “provinces” and “states” (not to be confused with countries aka “states”). For some countries, we will also include 1st order admin “regions” that group smaller 1st order units into larger statistical areas (eg: the United Kingdom’s England, Scotland, Wales, and Northern Ireland).

If you have 10 to 20 hours to spare, we need your help to complete Natural Earth Vector. Please email me at nathaniel@kelsocartography.com to find out more.

admin_1_world

admin_1_africa

admin_1_asia_se1

admin_1_australasia1admin_1_central_america_caribbean1

admin_1_south_america1

admin_1_europe1

admin_1_europe_detail1

Update Your Maps: Nigeria cedes Bakassi to Cameroon (BBC)

Thursday, August 14th, 2008

Nigeria has handed over the potentially oil-rich Bakassi peninsula to Cameroon, bringing an end to a long-standing dispute over the territory.

Reprinted from the BBC. Thursday, 14 August 2008.) Thanks Patterson!

The handover ceremony was moved from the peninsula’s main town to Calabar in Nigeria amid security concerns.

Over the past year about 50 people have been killed in clashes.

The majority of the local population considers itself Nigerian, but an international court ruled in favour of Cameroon in 2002.

The BBC’s Abdullahi Kaura in Calabar says there are unconfirmed reports that militants have attacked a boat travelling to Abana, the main town on the Bakassi peninsula.

 

Unresolved pain at Bakassi handover

Nigerian security sources said between three and seven people were killed when militants ambushed the boat as it made its way from Cameroon.

Correspondents say security had been beefed up ahead of the ceremony.

On the Cameroonian side, there have been celebrations as people moved back into the peninsula.

In recent years, at least 100,000 people have moved from the peninsula to Nigeria, local leaders say.

The International Court of Justice ruling was based on an early 19th century colonial agreement between Britain and Germany.

Nigeria challenged the ruling, but finally agreed to relinquish the territory two years ago.

“The gains made in adhering to the rule of law may outweigh the painful losses of ancestral homes,” said the head of the Nigerian delegation at the ceremony, Attorney General Mike Aondoakaa.

Part of the territory was handed over to Cameroon two years ago.

Revellers

A spokesman for Nigerian President Umaru Yar’Adua said the process was “painful… for everyone including the president”, but added that Nigeria had made “a commitment to the international community and we have a responsibility to keep it”.

 

Map

Cameroon said the final handover would mark “the end of a crisis”.

On the beaches of the northern part of the island there were parties and celebrations as Cameroonians prepared to go into the last section to be turned over to them.

“We are going straight to the place, and we’re going to be happy,” one reveller told the BBC’s Randy Joe Sa’ah in Bakassi.

But in Nigeria there is still bitterness about the deal.

“The government has abandoned its duties,” said Kayode Fasitere, the lawyer acting for some displaced from Bakassi who sought to have the handover delayed.

The transfer of Bakassi had been described by UN Secretary General Ban Ki-Moon as “a model for negotiated settlements of border disputes”.

A group of Bakassi leaders have been seeking compensation from the Nigerian government.

About 90% of the area’s population, estimated at up to 300,000, is made up of Nigerian fishermen.

About 30,000 of the residents have moved out to an area in Cross Rivers State set aside for them, but it has no access to the sea, campaigners say.

Bakassi has a rich fishing culture and people say the handover has destroyed their way of life.

The Bakassi peninsula juts out into the Gulf of Guinea close to the Niger Delta.

Its offshore waters are thought to contain substantial oil fields – untapped because of the border dispute – which Nigeria and Cameroon will now work together to explore.

It’s Still a Big City, Just Not Quite So Big (NY Times)

Wednesday, May 28th, 2008

[Editor's note: When asked to report the length of a border frontier I often pause a moment to reflect on map scale and precision. Both are developed in this article by Sam Roberts on how New York City has just shrunk by 5% in area due to a few cartographic slights of hand.]

over estimating new york city

By SAM ROBERTS. Published: May 22, 2008. Thanks Denny.

Graphic one (above) and 2nd graphic accompany the article.

Somehow, Michael S. Miller resisted the temptation when he got home not long ago.“Honey,” he would have been completely justified in proclaiming to his wife, “I shrank the city.”

Mr. Miller, a geographer for the Department of City Planning, has calculated that New York City is 17 square miles smaller than it was long thought to be.

For two decades, the city’s official directory, the Green Book, has stated definitively that the five boroughs encompass nearly 322 square miles of land.

Not so, Mr. Miller and his staff recently discovered: New York’s land area actually totals 304.8 square miles.

The shrinkage generally is not the result of rising sea levels from global warming or beach erosion or any other act of nature. It is largely the work of man, mainly Mayor Michael R. Bloomberg, whose yen to precisely measure everything from poverty to traffic congestion led the planning department to recalculate the city’s land mass.

Acting on the mayor’s mandate, Mr. Miller and his team spent months analyzing thousands of digitized, high-resolution aerial photographs of the squiggling shoreline and other geographic features to calculate the city’s size anew.“

This is not a reflection of a change in the physical area, but a refinement of the measurement,” Mr. Miller said.Seventeen square miles may not seem like much. But consider:

¶17 square miles could accommodate 13 more Central Parks, nearly a third of Washington, D.C., about three dozen versions of Vatican City and nearly two dozen replicas of Monaco.

¶If 17 square miles were populated at Manhattan’s density, New York might be home to as many as 1.1 million more people.

¶At the price of an acre in Midtown, as recently computed by the Federal Reserve Bank of New York, 17 square miles could be worth $1 trillion.

Mr. Miller said the recalculation probably would have little practical effect, other than revising the land area chart in the 2008 Green Book and amending other official records, textbooks and statistical abstracts. Its psychological impact might be significant, however, coming as it does at a time of political and economic uncertainty. With Wall Street firms shrinking, how will people respond to the news that Brooklyn is, too?

“All everybody else can talk about is how much bigger China and India are getting,” said Sylvie Smoke, 59, a retiree from the Upper West Side. “And we are losing it.”

On the other hand, given the effect of the credit crisis on real estate prices, some property owners might be pleased. If there is less land, maybe it will be worth more.

“I guess,” said Mike Slattery, senior vice president for research of the Real Estate Board of New York, “it’s good news for those who still have it.”

Planning department officials stress that their new measurement is only an estimate, an approximation subject to the vagaries of time. Over the course of four centuries, they note, the city’s land area has actually grown because adjacent waterways were reclaimed for development in Lower Manhattan and in Queens to extend the runways at Kennedy International and La Guardia Airports.

The new estimate, which will appear in the 2008 Green Book, to be released next month, reduces New York’s official size by about 5 percent.

But even in its supposedly diminished form, New York still ranks 14th in land area among cities with more than 100,000 people, according to the United States Census Bureau. (Anchorage covers nearly 1,700 square miles; Jacksonville, Fla., 758.) The new calculation also conforms more closely to census estimates.

Mr. Miller, 52, the planning department’s deputy director of information technology, said the apparent loss in land mass was distributed throughout the city.

“There’s no neighborhood that’s vanished,” he said.

That said, about seven square miles of the difference could be accounted for by better measurements of the islands and peninsulas in Jamaica Bay. And it appears that Brooklyn shrank the most, by about 12 percent, to 72 square miles from 82.

Continue reading . . . 

Zillow® Labs – Neighborhood Boundaries Shapefiles for Download

Tuesday, March 25th, 2008

zillow logo(Zillow.com via arcdigita.com) The Zillow data team has created a database of nearly 7,000 neighborhood boundaries in the largest cities in the U.S. And they’d like to share them with you! They’re sharing these neighborhoods under a Creative Commons license to allow people to use and contribute to their growing database.

Now comes the fine print: You are free to use the files in this database in applications as long as you attribute Zillow when you use it. You may also make your own changes to the database files and distribute them, as long as you provide them under the same kind of license and give Zillow attribution. The neighborhood shapes are available below, zipped up in the Arc Shapefile format.

The downloads are by state and available here:
http://www.zillow.com/labs/NeighborhoodBoundaries.htm