Title | ||
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Variation In Count Data Transferred From A Set Of Irregular Zones To A Set Of Regular Zones Through The Point-In-Polygon Method |
Abstract | ||
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This paper deals with variation in transferred data from a set of irregular zones (called source zones) to a set of regular zones (called target zones) through the point-in-polygon method (i.e., the method that transfers the attribute value of a source zone to a target zone if a representative point of the source zone is included in the target zone). First, the variation is written as a mathematical equation. Second, it is shown that among regular lattices of target zones, a regular hexagonal lattice gives the minimum variation. However, the difference in variation between a square lattice and a regular hexagonal lattice is very small. Third, under the condition that an allowable variation is less than 5 per cent (which is usually acceptable in practice), the safest (the most conservative) rule supported by a theory is that the point-in-polygon method should be used when the diameter of every source zone is less than 4 per cent of the length of the edge of a square cell. Last, a practical rule based upon empirical data is that the point-in-polygon method should be used when the perimeter of every sourer zone is less than around 20 per cent of the length of the edge of a square cell. |
Year | DOI | Venue |
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1997 | 10.1080/136588197242518 | INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE |
Keywords | DocType | Volume |
count data | Journal | 11 |
Issue | ISSN | Citations |
1 | 1365-8816 | 9 |
PageRank | References | Authors |
3.10 | 0 | 2 |
Name | Order | Citations | PageRank |
---|---|---|---|
Atsuyuki Okabe | 1 | 165 | 32.48 |
Yukio Sadahiro | 2 | 56 | 17.04 |