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January 29 2013

World Maps of Language Families

For teaching a class on the history and geography of the world’s major language families, good linguistic maps are essential. Unfortunately, serviceable maps that depict only language families are difficult to find.


July 22 2011

Index of Cartographic Images Illustrating Maps of the Late Medieval Period 1300
Index of Cartographic Images Illustrating Maps of the Late Medieval Period 1300 - 1500 A.D. 4:32 PM Jul 18th 
Begonya Cayuela

RIHA Journal, an international e-journal for the history of art
RIHA Journal, an international e-journal for the history of art 7:56 PM Jul 18th 
Begonya Cayuela

Theodulf, Goths and Garrisons: 7:23 PM Jul 21st
Theodulf, Goths and Garrisons: 7:23 PM Jul 21st 

Evernote shared notebook: different subjects | 2011-07-22

June 12 2011

Satellite to map ocean salt levels launched

An example of 8 days of aquarius sea surface salinity (sss) data.The US space agency early yesterday launched a satellite to observe salt levels on the surface of the world’s oceans and measure how changes in salinity may be linked to the future climate.

The $US400 million ($A380 million) Aquarius/SAC-D spacecraft, a partnership with Argentina, will aim to map the entire open ocean every seven days from 657 kilometres above the Earth, producing monthly estimates that show how salt levels change over time and location.

”Data from this mission will advance our understanding of the ocean,” said Michael Freilich, director of NASA’s Earth Science Division in Washington.

NASA said the three-year mission would be ”the most detailed summary of conditions ever undertaken”.

via Satellite to map ocean salt levels launched.

Here are some details from the NASA site ( about as to why:

The research-related goals of Aquarius include a better understanding of:

  • The water cycle – 86% of global evaporation and 78% of global precipitation occur over the ocean; thus SSS is the key variable for understanding how fresh water input and output affects ocean dynamics
  • Ocean circulation - With temperature, salinity determines seawater density and buoyancy, driving the extent of ocean stratification, mixing, and water mass formation
  • Climate – As computer models evolve, Aquarius will provide the essential SSS data needed to link the two major components of the climate system: the water cycle and ocean circulation


Reposted fromSigalontech Sigalontech

May 09 2011

April 26 2011


MapAction - Home Page

MapAction logo

The Emergency Mapping Service

Before an aid agency can respond to a disaster, their first need is for...information. Where are the affected people? Where are the relief resources? Who is doing what already?

MapAction delivers this vital information in the form of maps, created from information gathered at the disaster scene. By conveying a 'shared operational picture', our maps play a crucial role in delivering humanitarian aid to the right place, quickly.

MapAction is unique. We are the only non-governmental organisation (NGO) with a substantial track record in field mapping for disaster emergencies. Since 2004 we have helped in 25 emergencies including the Asian tsunami, earthquakes, volcanoes, floods and tropical storms. We can deploy a fully trained and equipped mapping team anywhere in the world, often within a few hours of an alert.

"Mapping support during the early phases of a response is critical, as responders and donors try to more clearly understand the situation on the ground. Without MapAction, the capacity to provide what is needed often simply doesn't exist." (UN disaster coordination manager, Pakistan flood emergency 2010) 


We have harnessed the power and portability of modern technology – particularly geographical information systems (GIS) and satellite location systems: GPS. So we can gather information on the ground, combine this with satellite images, and produce maps in the field, delivered directly to the rescue and relief agencies themselves. Between emergency missions we also deliver training in GIS and other skills to disaster management agencies around the world. Most importantly, we help to build disaster mapping capacity in the most vulnerable countries.

Making it all happen

MapAction delivers its ability to respond 365 days a year through a volunteer group of GIS professionals specialy trained in disaster response. Our volunteers work in a range of fields from Antarctic surveying to zoological research. They comprise the most competent and experienced emergency mapping team in the world. Backing up the operational volunteers is a cadre of full time staff, part-time specialist officials, and a board of trustees. MapAction counts among its strategic partners the UN Office for the Coordination of Humanitarian Affairs (UN-OCHA), with whom it regularly trains and works, UNOSAT, and the UK Government Department for International Development (DFID).

How you can help

Click here to find out how you can play a role in keeping MapAction’s volunteers ready to respond to disasters around the world.

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