Caitlin Dempsey
GIS User Groups in the United States
GIS user groups are a great way to network with other GIS professionals on a local level. GIS user groups commonly are organized at the regional level.
Geography Facts About the Southern Ocean
The Southern Ocean is the Earth's windiest, southernmost ocean and plays a vital role in Earth's environmental health.
Exploring Rainbows and Moonbows
Rainbows and moonbows occur when light is refracted through drops of water in the sky.
What is Snowliage?
Snowliage is when an early winter storm creates a bright white snowfall that contrasts with the red, oranges, and yellow fall foliage of trees.
How to Track Santa Claus in 2023
Learn about the history of tracking Santa's Christmas travels and how to follow Santa using NORAD's app.
GIS Tutorials
Online GIS tutorials from Geography Realm for mapping and data analysis.
What are Those Clumps in Trees?
A dense clump of dried leaves and twigs in a tree is mostly likely a squirrel's nest, known as a drey.
Monarch Butterfly Overwintering in California
November and December are the best times to see large clusters of monarch butterflies overwintering in the coastal groves of California.
X is Longitude, Y is Latitude
Here are some simple strategies for remembering that X is longitude and Y is latitude in GIS.
U.S. States With the Most Extreme Elevation Spans
Here are the states with the greatest difference in elevation between the highest and lowest points.
Study: More U.S. Homes Burn in Grassland and Shrubland Fires than Forest Wildfires
A new study in Science reports that in the United States, grassland and shrubland fires tend to be more extensive and burn more houses than forest fires.
What is the Difference Between a Crow and a Raven
Here are some ways you can determine the difference between the common raven (Corvus corax) and the American crow (Corvus brachyrhynchos).
Study: Human Activities Have Changed How Wolves Hunt Deer
Logging, linear features, and human infrastructure are changing where wolves hunt for deer.
Mapping Wildfire Movement
The Fire Events Data Suite is being used to map near real-time wildfire behavior including fire perimeters, active front, and total burned areas.
Analemma: The Sun’s Pattern in the Sky
Analemmas are diagrams and photographs that show the changing position of the Sun and the Earth's moon over the course of a year.
Climate Change is Affecting the Color of the Ocean
Researchers are using satellite data to analyzing the levels of phytoplankton in the oceans which are being affected by climate change.
Tallest Active Volcano in Eurasia
With an elevation of 15,597 feet (4,754 meters) Klyuchevskoy is Eurasia's tallest active volcano.
Using Satellites to Map Arctic Amplification
Scientists are using remotely sensed data from Earth observation satellites to map and study Arctic amplification.
Mapping Coral Bleaching With Satellites
Satellite data is being used by scientists to map out where ocean heatwaves are triggering coral bleaching events.
Acorn Woodpeckers in Northern California
Acorn woodpeckers can be found in a range of habitats in Northern California where oak trees are present.
The Gray-Green Urban Divide: How Wealth and Poverty are Visible from Space
Known as the "gray-green divide”, the amount of trees and green space can be an indicator of the income level of the neighborhood.
Largest Island in Alaska
Kodiak Island off the southern coast of Alaska is the second largest island in the United States.
Largest Dome Volcano in the World
Lassen Peak is the world's largest dome volcano with a height of 10,457 feet (3,187 meters).
Third Order Islands
Islands with lakes or ponds that contain smaller islands within them are called recursive islands.