What sort of changes has your neighborhood, the area around your school or university campus, or even your own backyard seen over the past few years? Outside our Esri office in Colorado, a large condominium complex has been under construction for a year. Its construction invites consideration of scale, change, and geography. In my neighborhood and in yours, GIS provides an excellent toolkit to examine changes and the reasons for them.
For centuries, communities changed very little, and indeed, some communities today undergo very little change. Yet in most communities, changes in infrastructure, total population, and the makeup of that population are commonplace. In my neighborhood, the hilltop site was chosen because of the excellent views its residents will have of the Colorado Front Range. These, incidentally, were formerly enjoyed by my colleagues on the north end of our building! Regionally, construction reflects population growth fuelled by the combination of high-tech industries, including GIS, and amenities such as nearby universities, the mountains, and the climate, making Colorado one of the fastest growing states over the past half century.
One way to do this is to examine imagery in ArcGIS Online and add three types of basemaps: Bing maps aerials, the ArcGIS Online imagery, and the USGS topographic maps layer. These sources were created on different dates and thus provide an easy and rich data source with which to examine changes in local communities. Revisit a changing area often and capture and save the updated images as I did here. Toggle the layers on and off and/or adjust the transparency so that you can compare and contrast them. Combine this to population change data that is easily added in ArcGIS Online.
Go outside and take pictures and videos around your local community. Write and sketch what you see. Revisit the same sites during different weather events and in different seasons, or in the case of my Esri neighborhood in Colorado, as construction progresses. Link these photographs, videos, and text to points on your ArcGIS Online maps. What changes are occurring, and why? What will your community look like and be like in 5 years? In 20 years? What can you do to influence your community in a positive way?
I invite you to use ArcGIS Online beginning with these simple but powerful ways.
- Joseph Kerski, Esri Education Manager