Raster Data

What is raster data?

Digital Photography

What is raster data?

Pixel Art

What is raster data?

Mona Lisa in Excel

What is raster data?

Figure 1: Values in the raster image

• regular grid
• grid cell contain information, here: color information

Example: Satellite imagery

• multiple layers, multiple information
  • e.g. blue, green and red reflectance
• all layers have the identical regular grid
  • extent
  • pixel size
  • pixel orientation

Example: Satellite imagery

Figure 2: Sentinel-2 bands contain color information that can be visualized as a True Color Composite

What makes a raster spatial?

• extent
• pixel size / spatial resolution
• coordinate reference system

What makes a raster spatial?

What makes a raster spatial?