The First Security System for Shapefiles
In This Issue
In the August 2011 edition of GeoView, we are proud to unveil a video introduction to VectorLock, the first security system for shapefiles. We also feature a detailed look at the Q3 US Parcel layer update as well as details on a new pricing model for pipelines and other corridors. From our partners, we have a new DigitalGlobe aerial coverage map for the US and Europe and details on the second edition of SPOTMAPS Australia.
Do You Know Who Has Your Mapping Data? If Not, Protect it With VectorLock - The First Security System For Shapefiles
A Video Introduction to VectorLock - The First Security System for Shapefiles
Specifics on the Q2 2011 US-Wide Parcel Layer Release
Custom US Parcel Pricing for Pipelines, Transmission Systems and Corridors
Satellites in the News – Aquarius
Gone Fishing – Invasion of the Snakehead
In Focus - Three Gorges Dam
High Resolution Satellite Imagery Shows an Increase in Rwanda’s Forest Cover
Q: “Ongoing Geospatial Education?” A: “Penn State.”
Monthly Update on DigitalGlobe’s Aerial Imagery Program
SPOTMAPS Australia – On Going Updates and High Location Accuracy
Word of the Month - Spectral Band
Geospatial Freebie of the Month - The ASTER GDEM
The Beaten Path – The Strategic Petroleum Reserves
The Speculative Tasking Program
If you would like to subscribe to our monthly newsletter, please click on the Subscribe button below.
Featured Image of the Month
Can you guess where this location is?
If you send us the correct location first, then you will win free ImageBoost on your next order! Click here for clues.
The Area of Interest
Considered one of the seven forgotten wonders of the world, Niagara Falls is a breathtaking tourist destination. Located on the Niagara River, it acts as an international water barrier separating the United States from Canada. It is composed of two major sections, the Horseshoe Falls on the Canadian side, and the American Falls on the U.S. side. These two sections are separated by Goat Island, a popular destination on the American side accessible by foot, car or trackless train. It derives its name from a herd of goats that was kept on the island in the late 1700s, but due to an extremely harsh winter, only one goat survived. Also included in Niagara Falls is another smaller waterfall called Bridal Veil Falls. At its base is the Cave of the Winds which provides a protective barrier from the runoff - and is a very kitschy place for people to get married – hence its name. The name Niagara is believed to be derived from “Niagagarega” who were a local branch of the Iroquois Nation that resided in the area when French settlers arrived in the 1700s.
Read More... »
The World is Flat
Can of alphabet soup mistaken for ransom note.
Rosie O’Donnell gets stuck in hula-hoop and is diagnosed with Ring Around The Rosie.
Alzheimer’s ward saves money on newspapers by just keeping an old edition around.
With only one fan in attendance, the guitar solo took on new meaning.
Brock Adam McCarty
Chief Operating Officer
Follow the links below to find each archived version of eMap International's GeoView newsletters from 2009, 2010 & 2011.
2009 | 2010 | 2011
High Resolution Satellite Imagery Shows an Increase in Rwanda's Forest Cover
In the late 1980s, the country of Rwanda’s image began to shift from a socially and environmentally progressive society to one that had fallen on hard times due to a decrease in agricultural output and governmental change. Outside interest from countries supplying aid also began to change with their desire to see democratic reform. This eventually led to a civil war in 1990, where the Rwandan Patriotic Front, a rebel movement comprised of Tutsis, clashed with government and military fighters comprised of Hutus. In 1994, Hutus took control of the government and issued orders to exterminate all Tutsis.
The civil war caused massive damage to the forests and natural resources, destroying hundreds of thousands of acres of land due to fighting and modification by refugees trying to make new homes. Today, forest covers only 20% of the country, and none is considered primary or old growth forest. Rwanda is located in the rain forest region of Africa, and deforestation in the area can be devastating to species that require the canopy for their livelihood, such as mountain gorillas.
Researchers at the University of Louisville, Jacob Noel, Dr. Jessica McCarty and Dr. Jennie Burnett, have studied forest cover patterns by employing satellite imagery. Large-scale deforestation can affect the international community by reducing oxygen production and forests’ ability to sequester greenhouse gases. Using Landsat Thematic Mapper images from 1986-2001 over Rwanda’s Gishwati Rainforest, Noel et al. analyzed forest cover loss during the period. The 1986 imagery showed nearly 100,000 hectares of forest cover, whereas in 2001 there was only 600 hectares left – a reduction in cover of over 99%!
Continuing their study, they used recent high-resolution imagery coming from dates into 2008 to measure any positive changes in forest cover. They looked at three districts in southern Rwanda: Huye, Nyarugur, and Nyamagabe. There has been a large reforestation effort in the country since 2000, and currently 7.7% of the nation is considered protected areas.
After a noticeable decrease in vegetation from 1986-2000, a period of increased vegetation occurred between the period from 2000-2008. A Normalized Difference Vegetation Index (NDVI) was used to measure reflectance values in each image. Deeper shades of blue showed a negative change in vegetation, while deeper shades of red indicated a positive change. Imagery from as late as 2008 showed that the area of study had reached 99.62% cover, up from 89.15% in 1989.
The researchers were then able to conclude that government policy was indeed a major factor in forest recovery and vegetative growth. The results of this study will hopefully lead to the implementation of a better policy for land use, as well as further consideration on growth regulations in the area.
A decrease in vegetation between 2000-2002 shown in blue areas.
An increase in vegetation between 2002-2008 shown in dark red areas.
- Back to Main -