A small child riding a kids red play scooter on a sidewalk.

Using GIS to Design Child-Friendly Cities

Mark Altaweel

Using GIS, cities can design child-friendly pedestrian pathways that prioritize children's interests and safety, promoting urban living and sustainability.

In March the ice arch starting to disintegrate. By April, satellite imagery was showing the crumbling of the ice pack behind the ice arch. By May, sea ice was flowing freely through Nares Strait. Images: NASA.

What is an Ice Arch?

Caitlin Dempsey

An ice arch forms when sea ice buckles under pressure, creating a natural arch-shaped structure in polar regions, often blocking the movement of ice.

A polynya that has formed in an embayment where the Venable Ice Shelf meets Farwell Island in Antartica. Photo: John Sonntag/NASA, public domain.

Polynyas: Natural Openings in Polar Ice

Caitlin Dempsey

Explore the geography of polynyas, unique open water areas in polar ice, and learn about their formation, ecological impact, and role in climate dynamics.

A series of maps measuring heat stress and heat risk reduction in a neighborhood in Washington D.C. and the relationship to urban tree cover.

Urban Tree Canopy Affects How Heat Stress Impacts Residents

Mark Altaweel

Minority and low-income neighborhoods have 11% fewer trees, are 1.5°C hotter, and have 14% more impervious surfaces than wealthier, whiter areas.

A map showing in orange the range of steller's jay and in blue the range of blue jay over a gray shaded relief map of the United States.

Types of GIS Data Explored: Vector and Raster

Caitlin Dempsey

Explore the key differences between GIS vector and raster data, and how each type supports diverse spatial analysis tasks.

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