By Joseph J. Kerski, Geographer, ESRI (email@example.com)
People have always been fascinated with investigating their home—the Earth. To understand our planet, ancient scholars in Rome, Greece, and China founded the study of geography over 2,500 years ago. Today, geography is more relevant than ever before, as issues of climate change, cultural diversity, economic globalization, urban sprawl, biodiversity loss, sustainable agriculture, water quality and quantity, crime, energy, tourism, politics, and natural hazards grow in importance on a global scale but also increasingly affect our everyday lives. To grapple with these issues requires a populace that has a firm foundation in geography, a populace that can see the “big picture” but also that understands how different patterns and trends are related from a global scale down to the local community. Geography is concerned with all of the relevant issues of our time, because all of these issues have a geographic component.
For centuries, maps have stirred imaginations and inspired explorations of the unknown. Today, maps are used to help understand relationships across areas and regions. These spatial relationships are analyzed using maps in digital form within a Geographic Information Systems (GIS) environment. In this way, rather than as static documents, these maps can be grappled with and combined with other maps, as well as charts, databases, and multimedia. GIS, together with Remote Sensing and Global Positioning Systems (GPS), make up the geotechnologies, which help people make everyday decisions and plans more effectively and efficiently.
In the classroom, GIS offers a powerful decision-making toolkit that helps students understand content in a variety of disciplines, not only geography, but history, mathematics, language arts, environmental studies, chemistry, biology, civics, and much more. GIS is used as an inquiry-driven, problem-solving, standards-based set of tasks that incorporates fieldwork and provides career pathways that are increasingly in demand. It helps students think critically, use real data, and connects them to their own community. It does so in informal, primary, secondary, and university settings and appeals to today’s visual learners. Geotechnologies, along with biotechnologies and nanotechnologies, are the three key skills and job markets identified by the US Department of Labor for the 21st Century.
What is the relationship between birth rate and life expectancy? How does acid mine drainage in a mountain range affect water quality downstream? How will climate change affect global food production? With GIS, students explore the relationships between people, climate, land use, vegetation, river systems, aquifers, landforms, soils, natural hazards, and much more.
Using GIS provides a way of exploring not only a body of content knowledge, but provides a way of thinking about the world. The geographic perspective informs other disciplines. When epidemiologists study the spread of diseases, scientists study climate change, or businesspersons determine where to locate a new retail establishment, they use spatial thinking and analysis. In each case, GIS provides critical tools for studying these issues and for solving very real problems on a daily basis.
GIS-based questions begin with the “whys of where”—why are cities, ecoregions, and earthquakes located where they are, and how are they affected by their proximity to nearby things and by invisible global interconnections and networks? After asking geographic questions, students acquire geographic resources and collect data online and from their own fieldwork. They analyze geographic data and discover relationships across time and space. Geographic investigations are often value-laden and involve critical thinking skills. For example, students investigate the relationship between altitude, latitude, climate, and cotton production. After discovering that much cotton is grown in dry regions that must be irrigated, they can ask “Should cotton be grown in these areas? Is this the best use of water and other natural resources?” Finally, students present the results of their investigations using GIS and multimedia. Their investigations usually spark additional questions, and the resulting cycle is the essence of geographic inquiry.
Our world is constantly changing. These changes include those brought about by physical forces such as erupting volcanoes, meandering rivers, and shifting plates, but also those brought about by human forces, such as urbanization. Students use GIS to understand that the Earth is changing, think scientifically and analytically about why it is changing, and then dig deeper: Should the Earth be changing in these ways? Is there anything that I should be doing or could be doing about it? This captures the heart of spatial thinking, inquiry and problem-based learning. It empowers students as they become decision-makers to make a difference in this changing world of ours.