Articles

Smoothing a line using the Generalize tool in ArcGIS. Image: Esri.

Generalization in GIS

Caitlin Dempsey

Generalization is the method used in GIS to reduce detail in data. Learn about how to generalize GIS data using QGIS, ArcGIS, and other software tools.

GAP ecological gap analysis map. Map: USGS.

Gap Analysis

Elizabeth Borneman

Gap analysis in ecology identifies areas where species lack protection, comparing actual habitats to areas conserved in order to guide conservation efforts.

Land Surveying and GIS Revisited: An Unnecessary Drama

Joseph Magnotta

Joseph Magnotta presents an opinion piece about the relationship between surveyors and the GIS industry and why it doesn't need to be contentious.

Digital attack map.

Mapping Digital Attacks Around the World

Caitlin Dempsey

The site Digital Attack Maps shows the leadingย Distributed Denial of Service (DDoS) attacks happening at the moment.

Some highlights of the improvements being offered with MapInfo Pro 64 bit

Latest Release of MapInfo Focuses on an Easier to Use Mapping Experience

Caitlin Dempsey

Pitney Bowes, the maker of MapInfo, has released an updated version of the GIS software that is aimed towards lowering ...

Times Square by Bert Monroy.

Bert Monroy – An Artist at the Intersection of Geography and Art

Kristina Jacob

Kristina Jacobs interviews Bert Monroy about his geography themed art.

Minimum cost-distance habitat linkages for a) black bear, b) bobcat, and c) fisher. These were merged to create the functional habitat linkage d)

How GIS is Being Used in Conservation Biology

Geo Contributor

GIS has a central role in analyzing the geographic distribution of endangered species, in measuring and monitoring biodiversity, and in identifying priorities for conservation management.

Boming Wang draw his map of the world on a chalkboard.

Mastering Geography

Caitlin Dempsey

Here are some people who have amazing memories when it comes to geography.

Incidents of Dengue overlaid on top of Land Surface Temperatures from Landsat TM. Source:

Four Ways GIS is Being Used to Help Populations Vulnerable to Long Term Climate Change

Devon Reeser

GIS is changing the way vulnerable populations relate with their natural world and resources to keep ahead of imminent climate changes.ย ย 

Atlantic view of fishing activity on Global Fishing Watch.

Using Geospatial Technologies to Map Illegal Fishing

Caitlin Dempsey

Worldwide overfishing is having a devastating effect on marine ecosystems.  A 2014 report from the United Nations Food and Agriculture Organization ...

Theory of Island Biogeography illustrated in a graph. Graph: Wikipedia.

Island Biogeography

Elizabeth Borneman

The biogeography of islands is a fascinating topic that extends to more than just island locations. The โ€˜islandโ€™ part of ...

Continents and Population Density

Caitlin Dempsey

The worksheet below is aimed towards helping elementary school students uses graphs to learn about the different continents and the ...

Monthly 700 hPa vertical velocity anomalies (Pa/s) from October of 1933 through March of 1934, calculated from the 20th Century Reanalysis. All anomalies are calculated relative to the baseline period of 1931โ€“1990.

New Study Discovers the Worst Drought of the Millennium Occurred in 1934

Rebecca Maxwell

According to the National Aeronautics and Space Administration (NASA), the worst drought of the last thousand years occurred in 1934 ...

Mapping the California Drought with Open Data

Caitlin Dempsey

The Center for Integrated Data Analytics (CIDA) of the United States Geological Survey has created an open source visual description of California's ongoing drought using free and publicly available GIS data sources

Creating a mosaic by stitching several orthorectified images. Source: Meo et al, 2012).

Using Drones to Create Fast Orthorectified Maps

Rebecca Maxwell

Computer scientist Mark Pritt, along with colleagues at Lockheed Martin in Gaithersburg, Maryland, developed a new algorithm to handle thousands of images and speed up the process of creating an orthorectified map from UAV aerial imagery.

Traffic along heile selasi Avenue next to Railway satation in Nairobi. Photo: Demosh

Finding Low Tech Solutions for Nairobi’s Commuters

Caitlin Dempsey

How do you help commuters navigate traffic when only 19% of the population owns a smartphone? IBM's Nairobi Labs has released a solution for commuters that uses low resolution traffic cameras to predict traffic patterns that are relayed via SMS.

Arriving in Pyongyang, the capital of North Korea. Photo: Arriving Pyongyang by Clay Gilliland, https://flic.kr/p/oWzGuu, CC BY-SA 2.0, https://creativecommons.org/licenses/by-sa/2.0/

Tourism in North Korea

Elizabeth Borneman

More and more people are flocking to the tightly controlled state for a peek into one of the most mysterious nations on Earth.

Parcel inquiry on Sangamon County, IL GIS Tax Parcel Viewer

How GIS is Being Used in Real Estate

Joseph Magnotta

What do GIS and real estate have in common? They both place a very high importance on location.ย For real estate ...

Wildfire management project of Ysleta del Sur Pueblo (Tigua Indian Reservation).

How GIS is Being Used to Help Native Americans

Sangeeta Deogawanka

Native Americans use GIS for heritage/environmental protection, economic development, education, health, transportation, land use, and resource management.

Relative Direction Versus Compass Direction

Caitlin Dempsey

Learn about the difference between relative directions and compass directions.

Imago Mundi from Babylonia, 500 BCE.

The Oldest Known Map of the World

Elizabeth Borneman

The oldest known world map is the Babylonian Map of the World known as the Imago Mundi.

Ecuador reforestation plots from Sistema รšnico de Informaciรณn Ambiental.

Putting the Trees Back on the Map: How GIS is Helping Reforest South America

Devon Reeser

GIS is being used in creative ways โ€“ including covert spy tracking of illegal logging deep in the Amazon โ€“ to help put and keep trees back on South Americaโ€™s map. The simplification of tools and availability of web systems has empowered technicians, NGOs, and governments alike to address corruption and illegal logging with transparent map-based monitoring.

GIS is commonly used in urban planning to assists with land use planning and development zoning maps. Zoning map from the City of Cambridge, MA.

GIS in Urban Planning

Geo Contributor

Frank Stafford, a graduate of Cambridge University with a background in Civil Engineering writes about why GIS is being used in Urban Planning.

QGIS versus ArcGIS

Caitlin Dempsey

When considering which GIS desktop software to adopt, two of the most popular choices are Esri’s ArcGIS and Quantum GIS, ...

Geography Awareness Week

Elizabeth Borneman

Geography Awareness Week is a weeklong event geared towards getting people more involved in the geographical world around them. Geography ...

Using Landsat images analyzed by a neural network, Anemone and his colleagues created a land cover map of the Great Divide Basin. Potential fossil locations are light red, and likely locations are dark red. (Map adapted from Anemone, et al., 2011.)

Finding Fossils with Remote Sensing

Rebecca Maxwell

In the field of paleontology, finding fossils is often a substantial undertaking. Researchers usually have to assemble crews of up ...

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