Articles

A view of a wetland with marshes on either side of a body of water.

Mapping the World’s Tidal Marshes

Mark Altaweel

The first global map of tidal marsh locations was developed using satellite-based imagery.

A grayscale map with dots to show the locations within the United States that are mapping urban heat.

Mapping Heat in U.S. Cities

Mark Altaweel

NOAA has been coordinating an effort to map urban heat islands in cities across the United States.

Screenshot showing a watershed boundary with lines showing the density of water flow on top of a base map.

How to Map Watersheds Using ArcGIS Pro: A Step-by-Step Guide

Jeff Oppong

This tutorial shows you how to use ArcGIS Pro to delineate watersheds and drainage paths from elevation data.

Growth of GIS job listings with the term open source.

Five Reasons to Start Using QGIS

Caitlin Dempsey

Here are five compelling reasons to start using the open-source GIS platform QGIS, a free and open source software.

This map shows city locations symbolized based on population sizes using graduated circles. Map: Caitlin Dempsey

What are Graduated Symbols in GIS?

Caitlin Dempsey

Graduated symbols is one way of visualizing data that can be quantified on a map in GIS.

A globe of the world with quotation marks.

GIS and Cartography Quotes

Caitlin Dempsey

Looking for a memorable GIS quote? Check out this growing collection of interesting and notable quotes relating to GIS, cartography, maps, and geography.

Marina del Rey area on a county map of the state of California.

A Guide to Understanding Map Scale in Cartography

Caitlin Dempsey

Map scale refers to the ratio between the distance on a map and the corresponding distance on the Earth's surface.

A blackbird feeding nestlings in a nest built on top of a rusty rake. A red wooden wall is in the background and a white downspout helps to support the nest.

Timing Mismatch is Resulting in Fewer Birds

Caitlin Dempsey

A study has found that shifts in the timing of spring seasons, linked to climate change, are impacting bird breeding patterns and leading to less offspring.

A series of three images: top is a gray shaded relief, middle is a black and white contour image, and the bottom is a digital elevation model in shades of red with darker red indicating higher elevation.

Overview of Elevation Data

Jeff Oppong

This article reviews some of terminology and types of elevation based datasets available to GIS.

Map of Florida. Map: Caitlin Dempsey, Natural Earth Data.

Interesting Geography Facts About Florida

Caitlin Dempsey

Show off your knowledge about Florida's geography with these fun and amazing facts.

Warming ocean waters stress corals and cause coral bleaching. Colonies of “blade fire coral” that have lost their symbiotic algae, or “bleached,” on a reef off of Islamorada, Florida. Photo: Kelsey Roberts, USGS. Public domain.

Warmer Ocean Temperatures are Bleaching Coral Reefs

Mark Altaweel

Higher ocean temperatures, along with overfishing and pollution, are leading to more coral bleaching events.

Satellite imagery of a wildfire burning in Canada with smoke streaming from the area.

Wildfires in Canada

Caitlin Dempsey

Canada's boreal forests are facing a strong start to the 2023 wildfire season in Alberta and British Columbia.

A shaded relief map of the northern part of the United States and Canada showing areas in green that are boreal and hemiboreal forests.

Boreal Forests of North America are Shrinking

Katarina Samurović

Boreal forests in North America are defying predictions of northward expansion in response to climate change.

A purple gradient map of a section of Maui in Hawaii showing in bright orange areas where wildfires are burning.

Wildfires in Hawaii

Caitlin Dempsey

Fueled by high winds and drought, a wildfire has destroyed much of Lahaina on the Hawaiian island of Maui.

Pom-pom anemone on the Pacific Ocean floor off California.

Highly Detailed Seafloor Maps

Mark Altaweel

Researchers from MBARI have developed methods to map the ocean floor at incredibly high resolution.

A satellite image of Vancouver island showing puffy clouds and swirling green phytoplankton blooms.

Phytoplankton Blooms in the Northeast Pacific Ocean

Caitlin Dempsey

During summer in the Northeast Pacific Ocean, phytoplankton blooms proliferate due to the nutrient-rich upwelling along the continental shelf.

A satellite image of a wildfire burning across Oregon.

2023 Wildfires in the Western United States

Caitlin Dempsey

So far in early August of 2023, the wildfire season in the western United States has not been as intense as prior years when a years-long drought was raging.

A satellite view of a wind farm called Windpark Fryslân in the Netherlands.

World’s Largest Freshwater Wind Farm

Caitlin Dempsey

The world's largest freshwater wind farm is the 89-turbine installation in Lake Ijssel located south of the Wadden Sea in the Netherlands.

A map of the world showing the global ocean current with warmer waters in red and cold currents in blue.

Potential Collapse of the Atlantic Meridional Overturning Circulation

Mark Altaweel

A new study predicts that the Atlantic meridional overturning circulation (AMOC) could potentially collapse within this century.

Side by side maps showing land cover and a suitability map showing areas where cocoa can be planted.

How to Use the Suitability Modeler in ArcGIS Pro

Jeff Oppong

Learn how to use the suitability modeler in ArcGIS Pro to map out suitable areas given a set of criteria.

Top image is a high resolution thermal image showing sources of heat. The bottom satellite image is from Landsat and show a lower resolution heat signature.

Mapping Building Heat Using Remote Sensing

Mark Altaweel

Startup Satellite Vu launched the first of a satellite constellation to measure building heat signatures in high resolution.

A Burmese python coiled in the grass in the Everglades.

Florida’s Burmese Python Invasion

Marques Hayes

The introduction of the Burmese Python into Florida has resulted in the decline of many native mammals in the Florida Everglades.

Side by side comparison of black and white photo from 1899 showing glaciers and a color photo from 2003 showing a bay with water.

When Did the Anthropocene Begin?

Mark Altaweel

The Anthropocene is a proposed geological epoch defined by the significant influence of human activity on Earth's ecosystems and geology.

Gray clouds hang in the sky over vegetation dotting the surface of the dune field. Bits of pink clouds appear below the gray and a hint of a rainbow appears in the sky.

Five Basic Types of Sand Dunes

Caitlin Dempsey

Sand dunes are mounds, hills, or ridges of sand built by wind. Learn about the five basic types of sand dunes.

A light aqua blue background gradient with the words "GIS and map competitions" with stars that have different kinds of maps embedded in them.

GIS and Map Contests

Caitlin Dempsey

Current map and GIS related competitions listed in order of the competition deadline.

The earth against a dark background with stars and a line through the middle showing the earth's axis with the labels 23.5 degrees, Earth's Axis, and equator.

Removing Groundwater is Affecting the Earth’s Axis

Mark Altaweel

Researchers have found that the enormous amount of groundwater being pumped is changing the Earth’s tilt and increasing sea level rise.