Articles

Next Generation Asset Management with iSTAR Pulsar

Geo Contributor

Danny Sullivan writes about how 360 imaging company NCTech's vehicle-mounted iSTAR Pulsar camera is being used by Icon Spatial as part of an asset management project for a major highway operator Australia.

Geography of International Travel by U.S. Presidents

Caitlin Dempsey

So where have U.S. presidents traveled?  This article explores the geography of international travel by sitting U.S. presidents.

Mapping Land Cover by Stacking Landsat Imagery

Mark Altaweel

Landsat 8 is offered as free, open data, which has led to new innovation in methods to better utilize such data for time series and complex scenes that are sometimes obstructed by clouds or dust.

Erbil Citadel, November 20, 2018, Landsat 8.

The Oldest Continuously Occupied Human Settlement

Caitlin Dempsey

Erbil Citadel, located in the center of Erbil, Iraq, is the oldest continuously occupied human settlement.

Various types and sizes of plastics collected from the Kinnickinnic River, Milwaukee, WI. Photo: S. Mason, State University of New York at Fredonia. Public domain. Source: USGS.

Stokes Drift Is Pushing Microplastics Towards the Arctic

Caitlin Dempsey

A recent publication in JGR Oceans took a look at how the physical processes of oceans affect the distribution of micro plastics around the world.

Normalized difference vegetation index satellite images of the state before and during the drought. | Image courtesy Chunyu Dong/UCLA.

Climate Change is Intensifying Drought in Southern California

Caitlin Dempsey

Researchers from UCLA and Columbia University discovered that the 2012–16 drought impacted Southern California more severely than northern regions.

Margaret Montgomery’s Map of Scotland. NLS shelfmark: EMS.s.701

Teaching Geography Through Map Samplers

Caitlin Dempsey

These map samplers, made by schoolgirls over 200 years ago, demonstrated how such craftwork was utilized to aid in the teaching of geography.

The dark-green, rectangular, reforested area of the Auwahi dryland forest in Hawaii as seen from above with surrounding grassland. Photo: Arthur Medeiros, USGS. Public domain.

What Is The Difference Between Afforestation and Reforestation?

Katarina Samurović

Both reforestation and afforestation represent a conversion of non-forested areas into new forests. So what's the difference between the two terms?

Using GIS to Analyze People’s Attitudes

Mark Altaweel

GIS can help researchers analyze spatial data within social media posts in order to understand how people react to different features in their environment.

Latest Release of ArcGIS Online Introduces New Features and Enhanced Capabilities

Geo Contributor

Bernard Szukalski, Esri tech evangelist and product strategist, introduces new features and enhancements to the latest release of ArcGIS Online.

Iceland's land mass is sparsely populated by trees. Image: NASA, public domain.

Iceland’s Long Road to Reforestation

Katarina Samurović

Reforestation and afforestation have a long tradition in Iceland, but the results are barely noticeable - only a tiny fraction of the land is now covered in forests.

Review | Who Owns England?

G.T. Dempsey

The concentration of wealth – in England, particularly landed wealth – is a most serious issue. 

The Arctic Permafrost is Thawing and It’s Causing Thousands of Landslides

Caitlin Dempsey

Using Banks Island, Canada as a study area, researchers analyzed trends in permafrost thaw and associated landslides.

36,500 Satellite Images from RADARSAT-1 Now Available to the Public

Caitlin Dempsey

The Canadian Space Agency and the Canada Centre for Mapping and Earth Observation have released RADARSAT-1's archive of 36,500 satellite images to the public.

Mapping School Performance and Inequality With GIS

Mark Altaweel

With GIS, researchers can look at how effective schools are relative to spatial measures.

Animated map showing the spread of the Cane Toad (Bufo marinus) throughout Australia from 1939 to 1980 at five year intervals. Map: Froggydarb, Mediawiki Commons.

Can Using a Waterless Barrier Prevent the Expansion of Invasive Species?

Caitlin Dempsey

In western Australia, researchers have proposed a waterless barrier method to halt the spread of cane toads.

Help Map Out Australia’s Dead Trees

Caitlin Dempsey

By using a GPS-enabled smartphone, volunteers can capture imagery of tree health around Australia to help researchers map out where trees are dying in Australia.

UK Satellite Data Now Available to Those Working in the Public Sector

Caitlin Dempsey

The UK Space Agency has announced that its radar and satellite imagery data will be made available to those working in the UK public sector.

Microsoft Releases Canada Building Footprint Database to OpenStreetMap

Caitlin Dempsey

Microsoft recently announced that it had released 12 million building footprints in Canada to the OpenStreetMap community.  

Fire Danger Reanalysis Dataset

Caitlin Dempsey

Researchers have made 38-years worth of global fire danger reanalysis available as an open dataset.

How the Last 160 Years Have Changed the Earth’s Climate

Geo Contributor

Since the Industrial Revolution, this level has been rising continuously, reaching 410 ppm in 2018.

The First South Atlantic Tropical Storm Since 2010

Caitlin Dempsey

Iba is the first tropical storm to form in the South Atlantic since 2010.

NASA Satellite Captures Image of Meteor Over the Bering Sea

Caitlin Dempsey

On December 18, 2018,  the Multi-angle Imaging SpectroRadiometer (MISR) instrument on NASA's Terra satellite detected the aftermath of an explosion of a fireball (a very bright meteor)  16 miles (26 kilometers) over the Bering Sea.

A 514m year old jellyfish – with tentacles still attached.Fu et al

Fossil Finds Reveal More About the ‘Cambrian explosion’ – When Oceans First Developed Complex Life

Geo Contributor

Recent fossil finds in China reveal Cambrian seas were more diverse than thought.

Manhole cover with a plan of old town part of Oldenburg, Germany. Photo: Anaconda74, Public domain

Maps on Manhole Covers

Caitlin Dempsey

Cities like Seattle, Chandigarh (India), and Oldenburg (Germany) have designed manhole covers with maps of their respective cities.

Topography of Australia’s Intertidal Zone Available as Open Data

Caitlin Dempsey

The National Intertidal Digital Elevation Model (NIDEM) is the first 3D model of Australia's intertidal zone. It is available for downloading as an open source dataset from Australia's National Map portal.