Determining and Evaluating High-Risk Zones

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Documentation for package ‘highriskzone’ version 1.4-1

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highriskzone-package Determining high-risk zones by using spatial point process methodology
bootcor Bootstrap correction to obtain desired failure probability
bootcorr Bootstrap correction to obtain desired failure probability
bootcor_restr Bootstrap correction to obtain desired failure probability
check_det_hrz_input Checks the arguments of det_hrz
check_det_hrz_restr_input Checks the arguments of det_hrz_restr
craterA Bomb crater Point Pattern
craterB Bomb crater Point Pattern
det_alpha calculation of alpha (failure probability), when having the threshold c
det_alpha_eval_ar Determination of failure probability within evaluation area
det_area Calculation of the area of the high-risk zone.
det_area_hole Calculation of the area of the high-risk zone.
det_guard_width Estimation of width of a guard region given an estimated highriskzone 'det_guard_width' determines the necessary width of a guard region in which the existence of additional observed bomb craters could change a intensity based estimated highriskzone within the evaluation area of interest. Within the evaluation area, the high risk zone consists of all points at which the estimated intensity of unexploded bombs exceeds a certain, specified or estimated threshold c. At a given point s, the intensity of unexploded bombs is given by the sum of all evaluated bivariate normal kernels centered at the observed bomb craters multiplied by a constant nxprob/1-nxprob. If the estimated intensity of unexploaded bombs is zero at a point at the boarder of the evaluation area an additional observation outside the area could lift the intensity only above the determined threshold if the distance to the boarder is small enough so that the density of the normal kernel (which is centered at the additional observation) is bigger than the threshold at the boarder (assuming that the estimated kernel doesn't change due to the additional observation). The function returns the biggest distance in which it is possible that the density of the bivariate normal kernel of the intensity of the supplied highriskzone exceeds thresh_const times the threshold of the highriskzone. If thresh_const is set to 1, the guard region is the smallest region with constant width around the evaluation area in which a single additional observation could (but not necessarily does) increase the highriskzone within the evaluation area at a point at the boarder if the intensity of unexploaded bombs was zero at this point before. If the intensity was >0 at a point at the boarder of the evaluation area, or more than 1 additional observations are found nearby outside of the evaluation area, the highriskzone within the evaluation area could already expand by addditional observations with a bigger distance from the boarder. This can be considered by setting thresh_const < 1, which intuitively means that 1/thresh_const crater observation at the same point could expand the highriskzone within the evaluation area in the direction of the additional observations, or that a point the boarder becomes part of the highriskzone by the observation of a single additional crater if the intensity at this point was thresh_cont times the highriskzone threshold based on all crater observations within the evaluation area.
det_hrz Determination of the high-risk zone.
det_hrz_eval_ar Determination of high-risk zone on smaller area of interest (evaluation area) than observation area.
det_hrz_restr Determination of the high-risk zone.
det_nnarea Determination of the area of a high-risk zone using the nearest-neighbour distance.
det_nsintens Determination of the intensity for the Neyman Scott simulation.
det_nsintens_restr Determination of the intensity for the Neyman-Scott simulation.
det_radius Determination of the nearest-neighbour distance which results in a high-risk zone with desired area
det_threshold Calculation of the threshold c, when having failure probability alpha.
det_thresholdfromarea Determination of alpha and the threshold c which results in a high-risk zone with desired area.
det_thresholdfromarea_rest Determination of alpha and the threshold c which results in a high-risk zone with desired area if a hole is present.
det_threshold_eval_ar Determination of necessary threshold to keep alpha in evaluation area
est_intens Estimates the intensity of the point pattern.
est_intens_spde Estimates the intensity of the point pattern by using the SPDE method from r-INLA.
est_intens_weight Estimates the intensity of the point pattern.
eval_hrz Evaluation of the high-risk zone.
eval_method Evaluation of the procedures determining the high-risk zone.
highriskzone Determination of the high-risk zone.
highriskzone.object Determination of the high-risk zone.
package-highriskzone Determining high-risk zones by using spatial point process methodology
plot.bootcorr Visualize the bootstrap correction for a high-risk zone.
plot.highriskzone Plot a high-risk zone
plot.hrzeval Visualize the evaluation of a high-risk zone.
print.bootcorr Print Brief Details of a bootstrap correction for a high-risk zone
print.highriskzone Print Brief Details of a high-risk zone
print.hrzeval Print Brief Details of an evaluation of a high-risk zone
read_pppdata Read data, so it can be used for high-risk zone methodology.
sim_intens Simulation on given intensity
sim_nsppp Generation of a realisation of a Neyman-Scott process
sim_nsprocess Simulation of the Neyman-Scott process.
summary.bootcorr Summary of a the bootstrap correction for a high-risk zone
summary.highriskzone Summary of a high-risk zone
summary.hrzeval Summary of a the evaluation of a high-risk zone
thin Thinning of the observations (for evaluating the method)