Caitlin Dempsey

Caitlin Dempsey is the editor of Geography Realm and holds a master's degree in Geography from UCLA as well as a Master of Library and Information Science (MLIS) from SJSU.

Voyant: Online Text Analysis Tool

Caitlin Dempsey

Voyant is an online text analysis tool that allows users to enter one or more URLs, a block of text, or a set of text documents, and see the results of terminology used.

Mapping the Transportation Network of the Roman World

Caitlin Dempsey

ORBIS is a mapping project developed by researchers at Stanford that reconstructs the financial and spatial challenges of transporting goods and people during Roman times about 200 CE.

The National Weather Service in Miami recently issued a "falling iguana" warning during a cold spell.

Why Do Iguanas Drop From Trees When It’s Cold in Florida?

Caitlin Dempsey

Occasionally, the temperature in southern Florida approaches freezing, leading to falling iguanas.

Geography Facts About Antarctica

Caitlin Dempsey

Learn interesting geography facts about the continent of Antarctica, the driest, coldest, highest continent on Earth.

Collage of geography pioneers

GeoQuiz: Pioneering Geographers

Caitlin Dempsey

Take this quiz to test how well you know about the contributions of these geographers.

An analysis of 24 years of radar data shows a shift to earlier spring migrations, particularly for birds at higher latitudes where regions are warming more quickly. Figure: Horton et al., 2020.

Spring Bird Migration is Happening Earlier for Some Birds

Caitlin Dempsey

With changes in temperature due to climate change, researchers looking at ย 24 years of radar data from the National Oceanic and Atmospheric Administration (NOAA) have found that migrating birds were more likely to arrive at certain stops earlier than they would have twenty years ago.ย 

Researchers analyzed Landsat satellite imagery between 1993 to 2018 to look at changes in subnival vegetation cover in the Himalayas.

Plant Life is Expanding in the Area around Mount Everest

Caitlin Dempsey

Using satellite imagery, researchers have found that subnival vegetation, the vegetation that grows between the treeline and snowline, is increasing in spatial extent around the Mount Everest and Himalaya area.ย 

Landsat 8 imagery of Kangaroo Island showing damage from wildfires. Acquirered January 9, 2020.

Satellite Imagery Shows Fire Damage to Australia’s Kangaroo Island

Caitlin Dempsey

Like parts of mainland Australia, Kangaroo Island has been devastated by bushfires fueled by drought and intense temperatures.

Map showing the location of Iran in the Middle East. Map from Equal Earth, public domain.

Physical Geography Facts About Iran

Caitlin Dempsey

Iran, known officially as the Islamic Republic of Iran, is a country located in the Middle East. ย 

Hoodoos at Bryce Canyon National Park. Photo: Bryce Canyon NPS, Public domain.

The World’s Highest Concentration of Hoodoos

Caitlin Dempsey

Hoodoos are tall, thin rock spires that occur all around the world.

Tallest mountain on each continent. Graph adapted from Cmglee, Wikimedia, CC BY-SA 3.0

Seven Summits: The Tallest Mountain on Each Continent

Caitlin Dempsey

Listed here are the tallest mountains based on summit elevation for each of the seven continents.

What is Snapping in GIS?

Caitlin Dempsey

Snapping involves connecting a geometric vertex or edges of one feature to another when editing a GIS dataset.

The Reference Elevation Model of Antarctica (REMA).

The Highest Continent

Caitlin Dempsey

"The land of snow and ice" is the highest continent on Earth.

Null Island: Where Geocoding Errors Go to Live

Caitlin Dempsey

Null Island, a fictional location at the confluence of the Equator and the Prime Meridian, is used for troubleshooting purposes as a way to flag geocoding failures.

Dumbo octopus. Source: NOAA.

Life at the Entrance to the Arctic Ocean

Caitlin Dempsey

Researchers traveled to the Chukchi Borderlands to learn more about deep ocean life at the entrance to the Arctic Ocean.

A view of Greenland

The Greenland Ice Sheet Has Lost 3.8 Trillion Tons of Ice

Caitlin Dempsey

A new report analyzed 26 satellite datasets to track ice loss for the Greenland Ice Sheet.

Open Repository for Geospatial Training Data Released

Caitlin Dempsey

Radiant Earth has launched Radiant MLHub, aย cloud-based open library for training geospatial data used by machine learning algorithms.

Satellite Data Shows That Tilling Less Leads to Healthier Soils

Caitlin Dempsey

Researchers applied machine learning to satellite-derived datasets to to analyze tillage practices and crop yields in the US Corn Belt between 2005 and 2017.ย 

There are Four Trillion Measurements in this Global Sea Surface Temperature Dataset

Caitlin Dempsey

Researchers have compiled an enormous global dataset with over four trillion satellite-based measurements of sea surface temperature.

Do Bison Influence the Spring Season?

Caitlin Dempsey

Researchers took a look at the foraging behavior of Yellowstoneโ€™s bison (Bison bison) to see how well their grazing behavior fits with the Green Wave Hypothesis.

MERIT Hydro: A High-Resolution Global Hydrography GIS Dataset

Caitlin Dempsey

Researchers have developed a high-resolution GIS dataset of river systems using remotely sensed data and OpenStreetMap data.

Lowest Natural Point in Japan

Caitlin Dempsey

At 4 m (13 ft), Lake Hachirลย ย in Akita Prefectureย in northernย Japan is the lowest natural point in Japan.

A map showing with icons the locations of GIS companies.

Map of Geospatial Companies Around the World

Caitlin Dempsey

Christoph Rieke has assembled a growing list of commercial geospatial companies with offices located all around the world.

Geospatial Data Available: Global Sea-surface Salinity

Caitlin Dempsey

Data from three satellite missions has been merged to produce a global time-series showing sea-surface salinity measurements between 2010 and 2018.

Thanksgiving Map

Thanksgiving Maps and Geography

Caitlin Dempsey

Thanksgiving maps about this holiday involving major feasting. Maps shown include distribution of turkey, green beans, sweet potatoes, and cranberries by Zellmer and a similar interactive map by Esri.

24 Days of QGIS Tips

Caitlin Dempsey

Using the #24daysofqgis hashtag, North Road, a geospatial company based out of ย Australia, will be tweeting out a QGIS tip or trick for 24 days starting on December 1.

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