Causes And Consequences Of Map GeneralizationThis text describes late-1990s understanding of map generalisation in the context of paper maps and GIS. Its particular value should be in helping to further automate and measure the process of map generalisation.; The research has concentrated on quantifying generalisation effects and on analysing how these effects of generalisation locked into the maps were measured. Elsa Joao's book covers the background to the problems of map generlasation; the methodology developed by the author to investigate the consequences of the map generalisation; a detailed description of results, and a conclusion that draws together consequences for the broader applications to GIS. |
Contents
Scale and generalisation in GIS | 1 |
a review | 27 |
Selecting and preparing the maps | 59 |
A methodology for the measurement of generalisation | 87 |
The effects of generalisation on individual features | 111 |
The impact of generalisation on GIS map manipulations | 159 |
repercussions | 187 |
Appendix A Generalisation effects embedded in | 211 |
Appendix B Raw data for each feature per scale for the | 223 |
Sample monochrome copies of the maps used | 239 |
| 247 | |
| 259 | |
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Common terms and phrases
alisation analysis automated automatically generalised boundary British maps British study area Canterbury cartographic generalisation cent city of Canterbury cut-off point database decrease different features different scales digital maps digitising displacement vectors Douglas-Peucker algorithm due to generalisation effects of generalisation eliminated example feature class feature type fractal dimension Fronteira generalisation algorithms generalisation effects generalisation operators generalisation process generalised lines GIS map manipulations individual features IPCC km² line generalisation manual generalisation map scales map sheet mapping agencies maximum measurements model generalisation Müller number of features number of points number of polygons Ordnance Survey overlay operation paper maps Portuguese maps Portuguese study area positional accuracy Rail ac Ramsgate Rd ac reduction Ribeira Grande rivers road buffers root mean square scale map sideways shift sinuosity smaller scales smaller-scale maps Sousel spatial Stour systematic error Table three scales topographic Total areal displacement triangulation points unit length VTRAK Weibel zones
Popular passages
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