Where it's at categories

Tuesday
May222012

GPS - How'd they think of that? 

A great talk talk about innovation, which then highlights the discovery of GPS! I just love the idea that GPS, something that has changed the face of geographic science, was stumbled upon by a group of people just doing something they they thought was cool! Granted, it was initially restricted to military use but now anyone can use this technology to navigate to the next coffee shop (for example).

Steven Johnson doesn't get talking about GPS until the end but just keep watching. It's quite fantastic. 

 

Monday
May072012

Geography as a Science

Since studying for my Bachelor of Arts in Geography at Syracuse University I never understood why the degree was not a Bachelor of Science. It certainly felt like science to me at the time! As I look back on my studies I also cannot understand how Geography somehow got pushed aside and nearly forgotten as a fundamental class in the curriculum at many high schools and even universities. I strongly feel that geography not only teaches you about those important connections between the more recognized scientific disciplines (biology, chemistry, physics, anthropology, astronomy) but also the essential skills of research, writing, and presentation that one will need through out their academic and professional career.

The article below lays out a good argument for why geography should be recognized as a fundamental science and deserves a firm position in any educational institution.

By  for About.Com.

Many secondary education institutions, particularly in the United States, include very minimal study of geography. They opt instead for separation and focus of many individual cultural and physical sciences, such as history, anthropology, geology, and biology, which are encompassed within the realms of both cultural geography and physical geography.

History of Geography

The trend to ignore geography in classrooms does seem to be slowly changing, though. Universities are starting to recognize more the value of geographic study and training and thus provide more classes and degree opportunities. However, there is still a long way to go before geography is widely recognized by all as a true, individual, and progressive science. This article will briefly cover parts of the history of geography, important discoveries, uses of the discipline today, and the methods, models, and technologies that geography uses, providing evidence that geography qualifies as a valuable science.

The discipline of geography is among the most ancient of all sciences, possibly even the oldest because it seeks to answer some of man’s most primitive questions. Geography was recognized anciently as a scholarly subject, and can be traced back to Eratosthenes, a Greek scholar who lived around 276-196 B.C.E. and who is often called, “the father of geography.” Eratosthenes was able to estimate the circumference of the earth with relative accuracy, using the angles of shadows, the distance between two cities, and a mathematical formula.

Claudius Ptolemaeus

Another important ancient geographer was Ptolemy, or Claudius Ptolemaeus, a Roman scholar who lived from about 90-170 C.E. Ptolemy is best known for his writings, the Almagest (about astronomy and geometry), the Tetrabiblos (about astrology), and the Geography – which significantly advanced geographic understanding at that time. Geography used the first ever recorded grid coordinates, longitude and latitude, discussed the important notion that a three dimensional shape such as the earth could not be perfectly represented on a two dimensional plane, and provided a large array of maps and pictures. Ptolemy’s work was not as accurate as today’s calculations, mostly due to inaccurate distances from place to place. His work influenced many cartographers and geographers after it was rediscovered during the Renaissance.

Alexander von Humboldt

Alexander von Humboldt, a German traveler, scientist, and geographer from 1769-1859, is commonly known as the “father of modern geography.” Von Humboldt contributed discoveries such as magnetic declination, permafrost, continentality, and created hundreds of detailed maps from his extensive traveling – including his own invention, isotherm maps (maps with isolines representing points of equal temperature). His greatest work, Kosmos, is a compilation of his knowledge about the earth and its relationship with humans and the universe – and remains one of the most important geographical works in the history of the discipline.

Without Eratosthenes, Ptolemy, von Humboldt, and many other important geographers, important and essential discoveries, world exploration and expansion, and advancing technologies would not have taken place. Through their use of mathematics, observation, exploration, and research, mankind has been able to experience progress and see the world, in ways unimaginable to early man.

Science in Geography

Modern geography, as well as many of the great, early geographers, adheres to the scientific method and pursues scientific principles and logic. Many important geographic discoveries and inventions were brought forth through complex understanding of the earth, its shape, size, rotation, and the mathematical equations that utilize that understanding. Discoveries like the compass, north and south poles, the earth’s magnetism, latitude and longitude, rotation and revolution, projections and maps, globes, and more modernly, geographic information systems (GIS), global positioning systems (GPS), and remote sensing – all come from rigorous study and a complex understanding of the earth, its resources, and mathematics.

Today we use and teach geography much like we have for centuries. We often use simple maps, compasses and globes, and learn about the physical and cultural geography of different regions of the world. But today we also use and teach geography in very different ways as well. We are a world that is increasingly digital and computerized. Geography is not unlike other sciences that have broken into that realm to advance our understanding of the world. We not only possess digital maps and compasses, but GIS and remote sensing allows for understanding of the earth, the atmosphere, its regions, its different elements and processes, and how it can all relate to humans.

Jerome E. Dobson, president of the American Geographical Society writes (in his article Through the Macroscope: Geography's View of the World) that these modern geographic tools “constitute a macroscope that allows scientists, practitioners, and the public alike to view the earth as never before.” Dobson argues that geographic tools allow for scientific advancement, and therefore geography deserves a place among the fundamental sciences, but more importantly, it deserves more of a role in education. Recognizing geography as a valuable science and studying and utilizing the progressive geographical tools will allow for many more scientific discoveries in our world.

Tuesday
Apr172012

New Bermuda Aerial Mapping Project

(BerNews Article published March 24, 2012)

An aerial survey of Bermuda will shortly be underway with the aim of providing current geographical data of the island.

The Department of Land Surveys and Registration, under the Ministry of Environment, Planning and Infrastructure Strategy, commissioned the survey, which will be conducted in two parts.

The first requires a specialist survey aircraft to take high resolution aerial photography of the island, using a camera mounted in the fuselage.

The airplane will fly up and down the island at a relatively low altitude, taking a series of photographs of the ground. This stage will begin early next month and hence the Ministry would like to advise the public in advance that there is no need to be alarmed by the low-flying aircraft.

In the second stage of the project, the survey company will extract information from the photographs, and create a digital map of Bermuda.

Through this method a technician can view the ground in three dimensions, and can trace the outlines and buildings to great accuracy.

 

The aircraft has an on-board GPS navigation system, which fixes its position every second to an accuracy of about 5cm. However, when the airplane is flying at close to 100mph, even a one second interval leaves big gaps between photographs, and additional work is required to exactly locate the camera’s position.

To do this, Survey Section needs to mark the ground with a number of large white targets which are surveyed to great accuracy, and are used to orientate and scale the photographs and “connect” them to the ground.

Staff from the Land Surveys Department began painting such targets on Monday.

Senior Land Surveyor at the Ministry of Environment, Planning and Infrastructure Strategy Peter Hopkin BA, FRICS, MSc (GIS), said: “While many of these targets have been placed on Government or public land, inevitably some needed to be placed on private land, and the Ministry is very
grateful to those land-owners who have graciously agreed to allow us to paint targets on their property.

“This aerial survey is the culmination of seven years’ work to upgrade Bermuda’s national reference system for modern use. There is a high, and rapidly increasing, demand for digital data for use with Geographic Information Systems [GIS] both within Government and from the private sector.”

The mapping project will cost about $260,000. The data will be used extensively throughout Government, but copies of the photographs and mapping will be available for purchase by the public.

The Minister of Environment, Planning and Infrastructure Strategy Marc Bean said: “The Bermuda Mapping Update Project is something that will be of great benefit to our island and is long overdue. Aerial photography and mapping were last updated in 2003 and since then over 1200 addresses have been created and are not mapped.

“Significant infrastructure developments are missing from the maps such as the National Stadium, Berkeley School and large housing developments such as Whale Watch, Loughlands and Harbour Side Village. Furthermore, many buildings and infrastructure no longer exist but are still shown on the existing mapping, for example the Sonesta Beach Resort and the Club Med Hotel.

“The omission of key detail reduces the quality and value of mapping. Up-todate quality mapping is fundamental to Bermuda’s modern digital economy because the majority of government and private projects require spatial information to operate.”

 

Wednesday
Feb082012

Does Government GIS Data Belong to the People? 

This is certainly a question any GIS professional is familiar with and most certainly has a strong opinion on. 

The article below is a U.S based case but the discussion of data sharing policies, in particular with regards to government databases, has been going on globally for years. 

The author briefly explains why governments are tempted into charging for access to data but they really should not have to, as the return on investment with GIS is significant. 


A California court case showcases the importance of public access to tax-funded databases.

By: Bruce Joffe

After nearly three years of legal wrangling, the Sierra Club and Orange County are now facing off in the California Supreme Court. The issue that brought the two organizations into conflict is one of great importance to GIS professionals and non-users alike: public access to government databases. 

 

Read more:  

 

 
Wednesday
Jan042012

"Best of Show" 

Ok, the title of the article below is quite over the top and it is clearly written by a staunch paper map enthusiast who hates the fact that people are using paper maps less and less; however, it does provide an interesting discussion and assessment of David Imus' "The Essential Geography of the United States of America", which was last year's "Best of Show" winner at the Cartography and Geographic Information Society's annual map competition. 

It also highlights some of the interesting challenges of map making. Worth a read.  

The Greatest Paper Map of the United States You'll Ever See

Monday
Nov282011

North at the Top of the Map

History of North at the Top of the Map

From Xanthe Webb Aintablian, Contributing Writer for About.com 

 

Why is north "up"?

Most modern-day maps typically show an orientation with north at the top of the two-dimensional depiction. In other eras, different directions at the top were more prevalent, and all directions have been used by different societies and cultures to depict our world. The biggest factors that contribute to north being commonly placed at the top of a map include the invention of the compass and the understanding of magnetic north and the egocentricity of society, mainly in Europe.


The Compass & Magnetic North

The discovery and use of the compass in Europe in the 1200-1500s may have greatly influenced many modern-day maps with north at the top. A compass points to magnetic north, and Europeans, like other cultures long before, noticed that the earth spins on an axis that is relatively pointed at the north star. That idea combined with the concept that when we look up we see the stars, contributed to north being placed up at the top of maps, with words and symbols being placed relative to that viewpoint.


Egocentricity in Societies

Egocentricity is having a view or perspective that revolves around you or your situation at the centre. Thus, in cartography and geography, an egocentric society is one that places itself in either the centre of a depiction of the world, or at the top. Information at the top of a map is commonly viewed as being both more visible and more significant.

Since Europe was a powerhouse in the world, producing both heavy exploration and the printing press – it was instinctual for European mapmakers to put Europe (and the Northern Hemisphere) as the focus at the top of maps. Today Europe and North America remain dominant cultural and economic forces, producing and influencing many maps – showing the Northern Hemisphere at the top of the map.


Different Orientations

Most early maps, before the wide-spread use of the compass, placed east at the top. This is generally thought to be due to the fact that the sun rises in the east. It was the most consistent directional maker.

Many cartographers show what they want to be the focus at the top of the map, and therefore, influence the orientation of the map. Many early Arab and Egyptian cartographers placed south at the top of the map because, having most of the world they knew of to the north of them, it drew the most attention to their area. Many early settlers of North America created maps with a west-east orientation that resulted from the direction that they primarily traveled and explored. Their own viewpoint greatly altered the orientation of their maps.

In the history of mapmaking, the general rule of thumb is whoever made the map is probably at the center or the top of it. This rings mostly true for centuries of mapmaking, but has been greatly influenced as well with European cartographers’ discovery of compasses and the magnetic north.

 

Monday
Nov212011

Basic Earth Facts

22 Essential Facts You Need to Know About the Planet Earth

By Matt Rosenberg, About.com Guide

 

Here you will find a listing of essential facts about the planet earth, the home to all of humanity:

Human Population of the Earth: Seven billion as of Nov. 2011

World Population Growth: 1.092% - 2009 estimate (this means at the current rate of growth, the earth's population will double in about 64 years)

Countries of the World: 196

Earth's Circumference at the Equator: 24,901.55 miles (40,075.16 km)

Earth's Circumference between the North and South Poles: 24,859.82 miles (40,008 km)

Earth's Diameter at the Equator: 7,926.28 miles (12,756.1 km)

Earth's Diameter at the Poles: 7,899.80 miles (12,713.5 km)

Average Distance from the Earth to the Sun: 93,020,000 miles (149,669,180 km)

Average Distance from the Earth to the Moon: 238,857 miles (384,403.1 km)

Highest Elevation on Earth - Mt. Everest, Asia: 29,035 feet (8850 m)

Tallest Mountain on Earth from Base to Peak - Mauna Kea, Hawaii: 33,480 feet (rising to 13,796 feet above sea level) (10204 m; 4205 m)

Point Farthest From the Center of the Earth - The peak of the volcano Chimborazo in Ecuador at 20,561 feet (6267 m) is farthest from the center of the earth due to its location near the equator and the oblateness of the Earth.

Lowest Elevation on Land - Dead Sea: 1369 feet below sea level (417.27 m)

Deepest Point in the Ocean - Challenger Deep, Mariana Trench, Western Pacific Ocean: 35,840 feet (10924 m)

Highest Temperature Recorded: 135.8°F - Al Aziziyah, Libya, September 13, 1922 (57.7°C)

Lowest Temperature Recorded: -128.5°F - Vostok, Antarctica, July 21, 1983 (-89.2°C)

Water vs. Land: 70.8% Water, 29.2% Land

Age of the Earth: 4.5 to 4.6 billion years

Atmosphere Content: 77% nitrogen, 21% oxygen, and traces of argon, carbon dioxide and water

Rotation on Axis: 23 hours and 56 minutes and 04.09053 seconds. But, it takes an additional four minutes for the earth to revolve to the same position as the day before relative to the sun (i.e. 24 hours).

Revolution around Sun: 365.2425 days

Chemical Composition of the Earth: 34.6% Iron, 29.5% Oxygen, 15.2% Silicon, 12.7% Magnesium, 2.4% Nickel, 1.9% Sulfur, and 0.05% Titanium

Wednesday
Nov162011

Happy GIS Day!!!

Today, November 16th 2011 is GIS Day. This internationally recognized event is a chance for organizations and educational facilities across the world to celebrate Geographic Information Systems (GIS) and showcase the importance of geographic literacy. 

Learn more about GIS Day 

 

 

Monday
Nov072011

What is Geography?

Have you wondered about Geography and where the term comes from? Click on the link below to watch a video about geography and its origins.

 

What is Geography? - Video

Thursday
Nov032011

Geography Matters

"A transformation is taking place. Businesses and government, schools and hospitals, nonprofit organizations, and others are taking advantage of it. All around the world, people are working more efficiently because of it. Information that was limited to spreadsheets and databases is being unleashed in a new, exciting way - all using geography. " (Geography Matters, ESRI)

 

Read more...