- Identify what is contained within a “data file” and “documentation file”

- Identify the file extensions for IDRISI raster and vector data and documentation files

- Define the following components of a raster documentation file: reference system, reference units, min and max X and Y's; resolution; min and max value and value units

- Interpret a frequency histogram, specifying what is being shown on the x and y axes

- Explain why qualitative maps are not displayed well with qualitative palettes, nor qualitative maps with quantitative palettes

- Explain why qualitative maps look right with quantitative palettes and qualitative maps with qualitative palettes
- Explain why quantitative images that range from 0-256 do not display well with palettes that range from 1-16

- Explain why quantitative images that range from 0-16 do not display well with palettes that range from 0-256.