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Relation Between Point Patterns

The statistics used to describe a point pattern relative to another point pattern are the same as are the statistics for one type of points. In the case of two different categories of points the pattern statistics characterize the location of one type point objects relative to another. If the objects are from the same category – the pattern is aggregated, random or regular. The spatial relation of two categories can be associated, random or segregated.
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ID P Question or exercise
3948 5 The attached file contains coordinates of churches and cemeteries in Estonia.
  1. What is the mean distance from a church to the nearest cemetery?
  2. What is the mean distance from a cemetery to the nearest church?
  3. How to explain the difference in these distances?
  4. Which distance from a church to the closest cemetery and from a cemetery to the nearest church is most frequent if to count fequency with 200 m interval?
  5. Is the distance from a church to the nearest cemetery significantly non-random at p<0.05 level?
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3983 4 Traffic accidents with pedestrians are frequent near schools. The attached file contains coordinates of rural schools (Maakoolid.txt), locations of traffic accidents with pedestrians in 2000-2010, and raster layer of state owned roads.

1. Up to which distance are the traffic accidents with pedestrians significantly (p < 0.01) more frequent compared to random locations at the following conditions?
  • If to generate random locations to roads.
  • If to generate random locations in Estonian borders.
  • If to generate random locations to the rectangle which bounds Estonia.
2. In the last case, what affects the frequency of random locations at greater distances (>200 km) from the rural schools?
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