An Implementation of the Centric Systematic Area Sampling (CSAS) and Simple Spatial Sampling Method (S3M) sampling approaches in R

calculate_area | Function to calculate the area size of the resulting hexagon... |

calculate_d | Function to calculate the distance 'd' given an area size (in... |

calculate_height | Calculate height (distance from north to south) of S3M grid... |

calculate_length | Calculate length (distance from east to west) of S3M grid... |

calculate_n | Function to calculate the number of hexagonal grids |

countryCentroid | A dataframe of country centroids |

create_buffer | Function to create a buffer around a SpatialPolygons or... |

create_s3m_grid | Create the rectangular S3M grid given a value of d of the... |

create_sp_grid | Function to create sampling grids as per CSAS or S3M... |

find_utm_hemisphere | Find UTM hemisphere based on a longitude and latitude GPS... |

find_utm_zone | Find the UTM zone based on a longitude and latitude GPS... |

gedaref_villages | A dataset of village names of Gedaref State, Sudan with data... |

get_nearest_point | Function to select nearest community to a given sampling... |

get_nn | Function to select nearest community to a given sampling... |

get_tri | A wrapper function to 'gDelaunayTriangulation()' to perform... |

get_utm | Get the appropriate UTM projection string given a longitude... |

map_projections | A dataset of UTM projections |

nearest_point | Function to select nearest community to a given sampling... |

sennar_villages | A dataset of village names of Sennar State, Sudan with data... |

spatialsampler | Simple Spatial Sampling Method (S3M) |

sudan01 | A map dataset of class SpatialPolygonsDataFrame of level 1... |

sudan02 | A map dataset of class SpatialPolygonsDataFrame of level 2... |

vary_density | Adjust triangulation by by dividing a densely populated... |

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