Today, I will review the difference between vector and raster data and practice embedding both into a StoryMap, considering how I would explain this to someone I’m mentoring.
I can add a vector layer and a raster layer into ArcGIS Online, describe what each shows, and reflect on how to explain the difference to 11th graders.
As seniors, you’re not just building your own projects — you’re also preparing to guide others. Knowing how to show the strengths and weaknesses of raster vs. vector data makes you a stronger designer and mentor.
💡 If you had to explain the difference between a photo (raster) and a drawing (vector) to a 9th grader, how would you do it in one sentence?
| Term | Definition | Example |
|---|---|---|
| Vector Data | Points, lines, and polygons for precise features. | Roads, building footprints, county boundaries. |
| Raster Data | A grid of cells/pixels showing continuous data. | Elevation, satellite images, land cover. |
| Resolution | Size of raster cells → determines detail. | 10m DEM vs. 30m DEM. |
✅ Check for Understanding #1
Ask: Which type (raster or vector) would be better for mapping the spread of warehouses in San Bernardino? Why?