Raster data is produced by scanning a paper chart. This process produces an image that is an exact replica of the paper chart and which comprises a number of lines that are composed of a large number of coloured dots, or pixels. This technique does not recognize individual objects, such as a sounding, which limits its ability to conform to certain international guidelines. However, the use of what is termed a vector overlay, which can display specified user data such as waypoints and system data such as radar overlays etc., can overcome this deficiency.
- What is ECDIS? & what are its advantages?
- What are errors of ECDIS?
- Who approves the ECDIS?
- What are Limitations of ECDIS?
- What are ECDIS Back-Up Requirements?
- Difference between RCDS AND ECDIS?
- CURRENT IHO ECDIS and ENC STANDARDS?
- What to do in areas without official ENC coverage?
- What is ECS ( ELECTRONIC CHART SYSTEM)?
- What are the disadvantages of RASTER charts?
- What are the advantages of raster charts?
- What are the disadvantages of Vector charts?
- What are VECTOR chart?
- What are the advantages of VECTOR charts?