Articles

These Two Satellite Images Highlight the Disappearance of a Glacier

Caitlin Dempsey

Okjökull was once a large glacier in Iceland located in western Iceland on top of the volcanic mountain Ok. 

New Map Shows How Fast Ice is Leaving Antarctica

Elizabeth Borneman

Researchers used synthetic-aperture radar (SAR) data to look at how the ice is moving and shifting on Antarctica.

Shaded elevation map with Voronoi cells overlayed with white boundaries for the California and Nevada region.

Voronoi Diagrams and GIS

Mark Altaweel

Voronoi diagrams can be created by many GIS packages today for understanding spatial patterns.

Non-diverse tree populations like this orange grove can potentially make drought conditions worse. Photo: Cynthia Mendoza, USDA, Fresno Harlen Ranch in Fresno, CA, 2014, public domain.

New Findings on How Trees Impact Droughts

Katarina Samurović

Recently published research looked at the question of, "Instead of looking at how drought affects the forest, how might this go the other way around?"

How Hydropower is Changing the Balkan Landscape

Katarina Samurović

How is the proliferation of hydro power plants (HPPs) changing Balkan peninsula's landscapes?

Mapping the Human Footprint

Mark Altaweel

The world settlement footprint, created in a online application called Urban Thematic Exploration Platform (TEP) sponsored by the European Space Agency (ESA), is the first map that combines optical and radar satellites to create a human urban footprint map of the world.

Willow Oak in City Park. Photo: USGS, public domain.

Increasing Tree Cover Linked to Improved Community Mental Health

Elizabeth Borneman

Studies show that adults who live in a neighborhood that has 30% or more tree coverage have lower odds of experiencing psychological distress in their lifetime.

Determining Uncertainty in GIS Data

Seda Salap Ayca

Multi-Criteria Evaluation (MCE) has widely been coupled with GIS to solve the spatial decision-making problems where there are several measures to be compared and screened for decision alternatives.

Version 3 of the ASTER Global Digital Elevation Model Released

Caitlin Dempsey

2.3 million scenes from the ASTER archive were processed to create the latest version of the ASTER Global Digital Elevation Model (GDEM).

Using Crowdsourcing and Deep Learning to Map Human Settlements

Mark Altaweel

Machine learning techniques are being used to map new urban and land use patterns that were previously difficult to detect using crowdsourcing data.

3 Ways Geospatial Data is Changing the Way We Manage the Environment Around Us

Geo Contributor

Dr. Michael Flaxman, director of Geodesign Technologies and Geospatial Community Advocate for OmniSci, presents three example of how newly available geospatial data is being leveraged.  

A laptop running QGIS, a mapping software.

What Skills Does a Geographer Need?

Caitlin Dempsey

To be a successful geographer, certain skills are needed in order to be able to understand the Earth’s physical environment as well as human patterns and processes. 

Greenland’s Ice Arch Crumbles Earlier Than Normal

Katarina Samurović

Across the Nares Strait, between Greenland and Ellesmere Island, lies a horizontal ice arch.

How Google Earth Engine Has Changed Access to Remote Sensing Data

Mark Altaweel

Google Earth Engine provides access to remote sensing data without requiring advanced software or skilled geospatial technicians.

kepler.gl’s point, arc, and heatmap layers (top) and grid, hexbin, and polygon layers (below) provide rich geospatial data analysis. Source: Uber

Uber’s Open Source Mapping Tool

Mark Altaweel

In 2016, kepler.gl, Uber’s mapping tool used to track and map journeys on its popular ride hailing application, was released as an open source project by the company.

Working with GIS Data using Python

Seda Salap Ayca

Explore how Python, a scripting and programming language, enhances problem-solving across spatial sciences, from GIS data handling to visualization.

Black bear foraging in a trash can. Photo: Florida Fish and Wildlife, 2008, CC BY-ND

GPS Tracking Shows That Black Bears Avoid Humans During the Day

Caitlin Dempsey

A recent study found that American black bears tend to become more nocturnal during spring in summer to avoid interacting with humans as they search for food.

Tracking Lost Dogs with Their Nose Prints

Elizabeth Borneman

A new Chinese Artificial Intelligence startup called Magvii is working on new technology that could help reunite lost pets and their owners.

Using Historical Photographs to Map Landscape Change

Mark Altaweel

Researchers used historical photographs, some dating back to the mid-19th century, to analyze changes in landscapes.

Map of the United States showing tree cover change in urban/community areas by state. Map: Nowak & Greenfield, 2018.

The U.S. is Losing 36 Million Trees Per Year

Caitlin Dempsey

A study from the US Forest Service has found that, nationally, tree cover is declining at a rate of 175,000 acres per year which is the equivalent of about 36 million trees lost each year.

Gulf of Mexico Remains the Second-largest Low-Oxygen Dead Zone on Earth

Caitlin Dempsey

A newly released forecast by the National Oceanic and Atmospheric Administration (NOAA) has predicted that the Gulf of Mexico will again become the second-largest low-oxygen dead zone on after (after the Baltic Sea).  

European Global Position System Failure Points to the Importance of Location Technology

Pitney Bowes

What is being called a “major outage” by the European Global Navigation Satellite System (GNSS) Agency, or GSA, highlights the critical importance played by the satellite systems that provide accurate positioning and time information to devices such as mobile phones, car navigation systems and other services such as land surveying.

The Northernmost Permanently Inhabited Spot on Earth

Caitlin Dempsey

Located 817 kilometers (508 mi) from the North Pole, Alert (82°30'05" ) is the northernmost place with a permanent (year-round) population.  

Japan’s Highest Mountain

Caitlin Dempsey

At 3,776 meters (12,389 feet) tall, Mount Fuji is Japan's highest mountain.  

How to Change the Projection of a Shapefile Using QGIS

Caitlin Dempsey

If you know your shapefile's beginning coordinate system or projection, you can export the data using QGIS.

With the Help of GPS Trackers, 40 Tons of Trash is Removed from the Pacific Ocean

Caitlin Dempsey

Ocean Voyages Institute (OVI), a nonprofit, recently collected 40 tons of trash from the Pacific Gyre.