Mapping Data: How Geographic Visualization Works
Put your data on the map. Literally.
Put your data on the map. Literally.
Every event happens somewhere. When you place data on a map, patterns emerge that are invisible in tables. Click on the map to place data points and watch clusters form.
Click to place data points. Clusters reveal patterns.
In 1854, John Snow plotted cholera deaths on a map of London and found them clustered around one water pump on Broad Street. He removed the pump handle and the outbreak stopped. This is considered the birth of epidemiology and data mapping.
Earth is a sphere, but maps are flat. Projecting a sphere onto a rectangle always distorts something: size, shape, distance, or direction. No map is perfectly accurate. Click each projection to see the trade-offs.
Mercator: preserves angles and shapes, but grossly distorts sizes near the poles.
A city planner needs to decide where to build a new fire station. No single dataset answers the question, but stacking layers reveals the answer. Toggle each layer to see how the picture builds.
Toggle layers on and off. Where should the new fire station go?
Geographic visualization powers decisions across every industry.
Traffic flow, population density, transit coverage, and zoning all live on maps. City planners overlay these to decide where to build schools, parks, and roads.
Temperature anomalies, sea level rise, deforestation, and ice coverage are mapped globally. Spatial patterns reveal regional impacts invisible in averages.
Where are your customers? Where are competitors? Where is demand unserved? Mapping sales data answers questions that pie charts cannot.
During hurricanes, earthquakes, and wildfires, responders use live maps to coordinate evacuations, allocate resources, and track damage in real time.
You've seen how placing data on a map reveals patterns invisible in spreadsheets. Clusters, corridors, and spatial relationships all become obvious when you add geography to your data.
"500 cases" is a number. "500 cases clustered around one water pump" is a discovery. Geography turns data into insight.
Every flat map stretches the globe. Mercator makes Greenland look huge. Equal-area maps distort shapes. No projection is perfect.
Stack roads, buildings, elevation, and your data as separate layers. Toggle them on and off to find correlations.
When you have thousands of points, individual dots become noise. A heatmap smooths them into a gradient showing where activity concentrates.
Put your new knowledge into practice!