September, 2014


GIS Data

Graphs showing the geographic distribution of lakes by abundance, total area, and total area. Source: Verpooter et al, 2014.Graphs showing the geographic distribution of lakes by abundance, total area, and total area. Source: Verpooter et al, 2014.

GLOWABO – Remotely Sensed Inventory of the World’s Lakes

Up until now, there have only been estimates of how many lakes there are in the world.  Four researchers from France, Sweden, Estonia, and the United States have attempted to answer long-standing question of, “how many lakes in the world” using remote sensing techniques. The team applied an automated algorithm […]

GIS Data

London from above in GB Minecraft 2.0. Source: Ordnance Survey.London from above in GB Minecraft 2.0. Source: Ordnance Survey.

Improved and More Realistic Minecraft Map of Great Britain

Last year, UK Ordnance Survey (OS) intern Joseph Braybrook created a geographically accurate map of Great Britain for the virtual reality game Minecraft.  That map was created using 22 billion blocks.  Now a full-time employee with the OS, Jopseph has built an improved map built using 83 billion blocks. From the […]

GIS Data

Changes in Earth’s gravity field resulting from loss of ice from West Antarctica between November 2009 and June 2012 (mE = 10–12 s–2). A combination of data from ESA’s GOCE mission and NASA’s Grace satellites shows the ‘vertical gravity gradient change’.Changes in Earth’s gravity field resulting from loss of ice from West Antarctica between November 2009 and June 2012 (mE = 10–12 s–2). A combination of data from ESA’s GOCE mission and NASA’s Grace satellites shows the ‘vertical gravity gradient change’. Source: DGFI/Planetary Visions

Measuring Small Variations in the Earth’s Gravity

Scientists can create higher resolution maps showing small variations in the earth’s gravity gradient by combining data from two different satellites. The NASA–German Grace satellites were launched in May of 2002 in order to map variations in Earth’s gravity field.  The two satellites fly about 220 kilometers (137 miles) apart in a polar […]

GIS Data

Carbon dioxide emissions increased in East Asia (right) at an average rate of 9.8% per year from 2003 to 2011, but nitrogen oxides increased by ‘only’ 5.8% per year. This indicates a use of cleaner technology in East Asia. North America and Europe, however, show slightly decreasing trends for both gases. The maps show the corresponding spatial pattern as obtained from the satellite data: red corresponds to regions with high values of NOx and CO2, while blue indicates background values. Source: University of Bremen.Carbon dioxide emissions increased in East Asia (right) at an average rate of 9.8% per year from 2003 to 2011, but nitrogen oxides increased by ‘only’ 5.8% per year. This indicates a use of cleaner technology in East Asia. North America and Europe, however, show slightly decreasing trends for both gases. The maps show the corresponding spatial pattern as obtained from the satellite data: red corresponds to regions with high values of NOx and CO2, while blue indicates background values. Source: University of Bremen.

Measuring Carbon Dioxide and Nitrogen Dioxide Trends with Remote Sensing

Researchers from the University of Bremen published in Nature Geoscience the results of an effort to implement a top-down approach using data acquired remotely.

GIS Data

This overlay showing WGS 84 Ellipsoid Mercator in Blue and the Spherical Web Mercator in Red WGS 84 highlights the spatial inaccuracies of the latter projection.This overlay showing WGS 84 Ellipsoid Mercator in Blue and the Spherical Web Mercator in Red WGS 84 highlights the spatial inaccuracies of the latter projection.

National Geospatial-Intelligence Agency’s Web Mercator Advisory Notice

The National Geospatial-Intelligence Agency (NGA) has an advisory notice posted on its site warning about errors users of the popular Web Mercator projection stating, “the use of Web Mercator and other non-WGS 84 spatial reference systems may cause geo-location / geo-coordinate errors up to 40,000 meters.”

GIS Data

Healthmap.org

Mapping the Outbreaks of Diseases

In August of 2014, the World Health Organization declared a public emergency in response to the growing number of Ebola cases that have struck several West African countries. So far, the countries that have been hit hardest include Nigeria, Liberia, Sierra Leone, Guinea, and Senegal. In those countries, more than […]

GIS Software

Orange County Watershed Map in GIS Cloud's Map EditorOrange County Watershed Map in GIS Cloud's Map Editor

Where is the Cloud in GIS for Watershed Management?

Barbara Horvatic, the Marketing Manager at GIS Cloud, explains how using a cloud-based GIS can help create a collaborative environment for pulling together and manipulate disparate datasets.   With the recent increase in frequency of flooding events (followed by the usual ‘I haven’t seen this in the past hundred years’ […]

GIS Learning

Ordnance Survey Launches the GeoVation Housing Challenge

The Ordnance Survey has launched new GeoVation challenge that offers £101,000 to the ventures that make the best use of geography, technology, and good design in order to offer solutions that address the identified problems of long term housing issues in the United Kingdom.  Looking to provide a way for people in Britain to […]