Introduction to Raster Data
- Raster data is pixelated data where each pixel is associated with a specific location.
- Raster data always has an extent and a resolution.
- The extent is the geographical area covered by a raster.
- The resolution is the area covered by each pixel of a raster.
Introduction to Vector Data
- Vector data structures represent specific features on the Earth’s surface along with attributes of those features.
- Vector objects are either points, lines, or polygons.
Coordinate Reference Systems
- All geospatial datasets (raster and vector) are associated with a specific coordinate reference system.
- A coordinate reference system includes datum, projection, and additional parameters specific to the dataset.
The Geospatial Landscape
- Many software packages exist for working with geospatial data.
- Command-line programs allow you to automate and reproduce your work.
- The RStudio GUI provides a user-friendly interface for working with R.