Caitlin Dempsey

Caitlin Dempsey is a geographer, writer, and founder and editor of Geography Realm. She holds bachelor's and master's degrees in Geography from UCLA and a Master of Library and Information Science (MLIS) from San José State University.

For more than two decades, she has written about geography, maps, geographic information systems (GIS), remote sensing, satellite imagery, and environmental science. Her work focuses on making geography accessible to a broad audience through articles, tutorials, and educational resources.

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Wilderness.net's interactive map.

Eight Online Maps in Celebration of the 50th Anniversary of the Wilderness Act

Caitlin Dempsey

In celebration of the 50th anniversary of the Wilderness Act, Wilderness50 was launched by a coalition of agencies, organizations, and universities to help elevate wilderness protection.

Female (upper bird) and male (lower bird) Passenger Pigeons. Reproduced from the John J. Audubon Plate

Centennial of the Extinction of the Passenger Pigeon

Caitlin Dempsey

September 1, 2014 marks the hundred year anniversary of the extinction of the Passenger Pigeon.  Passenger pigeons were once the ...

Sleep patterns by Jawbone UP users around the time of the Napa earthquake.

Who Did the Napa Earthquake Wake Up?

Caitlin Dempsey

Jawbone aggregated data from thousands of UP activity trackers to see what percentage of people in the Bay Area were woken up by the Napa earthquake.

Mapping out stories about pollutants in California.

Mapping the Impacts of Climate Change in California

Caitlin Dempsey

A group of Stanford students taking a biology class entitled Geographic Impacts of Climate Change: Mapping the Stories have mapped out news and journal articles about climate change in California.

Map of nations using English as a de facto or official majority language (dark blue) or an official minority language (light blue)

Geography of Languages

Caitlin Dempsey

Information about which country has the most spoken languages, which country has the most official languages, and which language is spoken in the most countries.

GPS sites showing the measured displacement. As the drought deepens in March of 2014, the red dots showed the greatest uplift in the Sierra Mountains. Source: Borsa et al.

Tracking the Effects of Drought in the Western U.S. with GPS

Caitlin Dempsey

The effects of the drought that has stricken the western United States can be measured with GPS.  As anyone who ...

Map showing the urban heat island effect in Cincinnati, Ohio.

Hot Cities Getting Hotter in the US

Caitlin Dempsey

Climate Central has published a new report that took at look at the increases in temperature in sixty of the largest U.S. cities.

The border between northwestern China around the city of Qoqek and far eastern Kazakhstan near Lake Balqash.

Borders that are Visible on Satellite Imagery

Caitlin Dempsey

Here are international borders that are visible on satellite imagery.

Heat map showing clusters for Fortune 1000 companies.

Geography of Fortune 1000 Companies in 2014

Caitlin Dempsey

The 2014 listing of Fortune 1000 companies were mapped out in order to understand the answers to such questions as which states have the most Fortune 1000 companies and where are there geographic clusters of Fortune 1000 companies.

Fortune 1000 and Fortune 500 Companies by State for 2014

Caitlin Dempsey

This table shows the total number of Fortune 1000 and Fortune 500 companies by U.S. state and territory (Puerto Rico). The list can be sorted by state, number of Fortune 1000 companies, and number of Fortune 500 companies.

List of Fortune 1000 Companies by Urban Area for 2014

Caitlin Dempsey

A list of the total number of Fortune 1000 by urban area as defined by the US Census Bureau. The list can be sorted by urban name, total number of Fortune 1000 companies, and by 2010 population.

Fortune 1000 Companies List for 2014

Caitlin Dempsey

Excerpt of Fortune 1000 companies for 2014 which can be filtered by state.

What is the Difference Between a Heat Map and a Hot Spot Map?

Caitlin Dempsey

Learn about the difference between Heat Maps and Hot Spot Maps in GIS.

Benjamin Heumann and the UAV. Photo: Heumann, Central Michigan Press Release.

Using Unmanned Aircraft to Help Map Threatened Plant Species

Caitlin Dempsey

Geography researchers at Central Michigan University have tested out the usability of UAVs in mapping out threatened plant species.  

Detected methane leaks in the city of Staten Island.

Mapping Methane Leaks with Google Street View Cars

Caitlin Dempsey

Google partnered with the Environmental Defense Fund on a pilot project to use Google’s fleet of Street View cars to ...

No Drones Zones: Map and GIS Data

Caitlin Dempsey

Unmanned aircraft, known more commonly as drones, have a blanket ban by the Federal Aviation Authority in the United States over military ...

GRACE based shallow groundwater drought indicator map for July 7, 2014. Source: NASA.

Using Remote Sensing to Measure the Effect of Drought on Ground Water

Caitlin Dempsey

This map shows a comparison of modeled relative amount of water stored in underground aquifers in the continental United States for July 7, 2014 as compared to the average for comparable weeks for the sixty year average water storage.  

How Topography Affects Language

Caitlin Dempsey

How high up you live affects your spoken language.

History of Geography as a Timeline

Caitlin Dempsey

Listed here are significant events that happened in the field of Geography.

Maps of Israel

Caitlin Dempsey

Printable maps of Israel.  This collection of maps showing the country of Israel include a detailed map showing major cities ...

GIS Tutorial for Python Scripting

Caitlin Dempsey

GIS Tutorial for Python Scripting is a new release from Esri Press.  This workbook contains hands-on programming exercises to familiarize GIS users ...

Esri Launches GeoNet

Caitlin Dempsey

Timing its announcement with the start of the annual Esri International User Conference, Esri has announced the launch of GeoNet, ...

The town of Å in Norway. Photo: © hansenn / stock.adobe.com.

Longest and Shortest Geographical Names in the World

Caitlin Dempsey

Learn about the longest and short names for geographical locations in the world.

USGS Report on the Uses and Benefits of Landsat Imagery in Water Resources

Caitlin Dempsey

The USGS recently published a report looking at case studies of Landsat Imagery use in water resource management within public ...

Esri Releases Explorer for ArcGIS for Mac OS

Caitlin Dempsey

Data viewer from Esri for MacOS which offers limited functionality to "access maps, search for and visualize data."

Help Find Invasive Weeds in Hawaii

Caitlin Dempsey

Tomnod, which previously helped with crowdsourcing the search for the missing Malaysian Airlines flight, has teamed up with the Nature Conservancy ...