Spatial Data
- Created by: mollyb
- Created on: 13-06-13 18:52
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- Spatial Data
- Maps
- simplest form of displaying data over space with relevant features
- display of spatial pattern of a vast range of data
- Isopleths or Isolines
- makes spatial patterns out of point form data by using lines to join up points with the same value
- isopleths are lines that represent the same value at the points is an area through which it passes
- contour lines
- colour and shading can be used to fill in the area between isopleths to stress value changes
- Limitations
- selection of the interval between isopleths is crucial
- shape and size needs to be considered for units
- should be smooth, not angular or erratic
- choropleths
- gives quick visual impression of patterns
- density maps where areas are shaded in to represent the average number per unit area
- limitations
- treats the area as a whole so hides variations within area
- scale of the areal division is crucial
- colours are difficult to use so should be avoided
- shading range important
- Maps
- choropleths
- gives quick visual impression of patterns
- density maps where areas are shaded in to represent the average number per unit area
- limitations
- treats the area as a whole so hides variations within area
- scale of the areal division is crucial
- colours are difficult to use so should be avoided
- shading range important
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