# Generation of Center Points

### Description

Given a multi-resolution level, generate center points of each grid box by G\"ottlemann's method, modified G\"ottlemann's method or standard method.

### Usage

1 2 3 4 5 6 | ```
modregcenter(l) # for modified G\"{o}ttlemann's regular grid
modredcenter(l) # for modified G\"{o}ttlemann's reduced grid
gotregcenter(l) # for G\"{o}ttlemann's regular grid
gotredcenter(l) # for G\"{o}ttlemann's reduced grid
regcenter(l) # for standard regular grid
redcenter(l) # for standard reduced grid
``` |

### Arguments

`l` |
an integer which denotes the index of multi-resolution level |

### Details

It is for obtaining the center points of each grid box from the grid according to multi-resolution level. The values will be used for network design.

### Value

`center` |
center points from grid |

### References

G\"ottlemann, J. (1996) Locally supported wavelets on the sphere. Preprint, Johannes Gutenberg University, Mainz.

Oh, H-S. (1999) Spherical wavelets and their statistical analysis with applications to meteorological data. Ph.D. Thesis, Department of Statistics, Texas A\&M University, College Station.

### See Also

`network`

### Examples

1 2 3 4 5 6 | ```
modregcenter(3)$center
modredcenter(3)$center
gotregcenter(3)$center
gotredcenter(3)$center
regcenter(3)$center
redcenter(3)$center
``` |

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