Image Classification -
Compare a Satellite Image with a Classification

Duesseldorf 1
Düsseldorf in a satellite image.
Source: www.flaechennutzung.nrw.de
Duesseldorf 2
Düsseldorf on an classified image.
Source: www.flaechennutzung.nrw.de

Tasks

  1. Please compile the legend by adding the right colour to the 10 land cover classes. Following colours are given: yellow - light green - medium red - blue - lime green - dark red - grey - light red - dark green - medium green
  2. Estimate the area percentage of each land cover class (be sure not to exceed 100% in total)
  3. Legend class Colour Area percentage
    High degree of sealing (> 80%)    
    Medium degree of sealing (40 - 80%)    
    Low degree of sealing (< 40%)  
    Waste deposit sites, gravel-pits, building sites   -
    Agricultural land    
    Grassland and pasture    
    Coniferous forest    
    Mixed forest  
    Deciduous forest  
    Water bodies    
  4. Name reasons why a classification is useful.
  5. True colour satellite image or classified image? Name advantages and disadvantages of true colour and classified satellite images and where they are most useful.