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Display Classes

Definition: A classification of features that enables a meaningful display of hydrographic features in Europe/Middle East/Africa and Asia-Pacific. The classification is assigned according to the importance of the associated feature.

Display Class information can be used to determine which features to display at different zoom levels.

Default value: 8

NOTE: Display Class definitions for hydrographic features use different criteria for individual classes than Display Class for POIs.

Value Description
blank Not Applicable
1 First Class:
  • Oceans
  • Rivers, Canals and Intermittent Rivers displayed at world overview maps at an approximate scale of 1:50,000,000 or based on local knowledge. For example, the Mississippi River in North America or the Rhein River in Europe.
  • Bay/Harbours touching Oceans or touching Rivers included at Display Class = 1 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.
2 Second Class:
  • Rivers, Canals and Intermittent Rivers on commercial maps at an approximate scale of 1:25,000,000 or based on local knowledge.
  • Bay/Harbours touching Rivers included as Display Class = 2 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.
3 Third Class:
  • Rivers, Canals and Intermittent Rivers displayed on commercial maps at an approximate scale of 1:10,000,000 or based on local knowledge.
  • Bay/Harbours touching Rivers included as Display Class = 3 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.
4 Fourth Class:
  • Rivers, Canals and Intermittent Rivers displayed on commercial maps at an approximate scale of 1:2,500,000 or based on local knowledge.
  • Bay/Harbours touching Rivers included as Display Class = 4 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.
5 Fifth Class:
  • Rivers, Canals and Intermittent Rivers displayed on commercial maps at an approximate scale of 1:1,000,000 or based on local knowledge.
  • Bay/Harbours touching rivers included as Display Class = 5 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.
6 Sixth Class:
  • Rivers, Canals and Intermittent Rivers displayed on commercial maps at an approximate scale of 1:500,000 or based on local knowledge.
  • Bay/Harbours touching rivers included as Display Class = 6 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.
7 Seventh Class:
  • Rivers, Canals and Intermittent Rivers displayed on commercial maps at an approximate scale of scale 1:150,000 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.
8 Eighth Class:
  • Rivers, Canals and Intermittent Rivers displayed on commercial maps at an approximate scale of 1:30,000 or based on local knowledge.
  • Lakes and Parks in Water; see Lakes and Parks in Water Display Classes.