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evacpath - Least-Cost Pedestrian Evacuation Modeling

Tools for road-constrained, least-cost pedestrian evacuation modeling. The package provides reusable functions for preparing hazard zones, generating road-based evacuation origin points, identifying escape/safety points, creating slope-based conductance surfaces, calculating least-cost distance to safety, and converting distance outputs into evacuation-time polygons. It is designed to support workflows like tsunami evacuation modeling while remaining adaptable to other regions and hazards. Tsunami-specific helpers support separate land-only hazard zones, water-combined escape zones, road-aware escape boundaries, and study-area inset cropping for quality assurance and quality control. Methods build on Cordero et al. (2025) <doi:10.1007/s44367-025-00018-y>, Lewis (2021) <doi:10.1007/s10816-021-09522-w>, and Joseph Lewis's 'leastcostpath' package (2023) <https://CRAN.R-project.org/package=leastcostpath>.

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5.35 score 325 downloads

potentiomap - Build Potentiometric Surfaces and Hydraulic-Gradient Arrows

Prepares groundwater-level observations from measured hydraulic head or from depth-to-water and land-surface elevation, interpolates potentiometric surfaces using thin-plate splines, inverse-distance weighting, ordinary Kriging, universal Kriging, or user-supplied methods, and creates raster, contour, diagnostic, support, and hydraulic-gradient products for review and export. Functions retain method conditions and fit diagnostics, validate explicit prediction tasks, inspect model-conditional uncertainty and monitoring-network sensitivity, identify limited prediction support, and check whether scaled hydraulic-gradient arrows remain within finite raster support and end at lower modeled head. Raster processing uses methods from 'terra' (Hijmans 2025) <doi:10.32614/CRAN.package.terra>, thin-plate splines use methods from 'fields' (Nychka et al. 2021) <doi:10.5065/D6W957CT>, and geostatistical interpolation uses methods from 'gstat' (Pebesma 2004) <doi:10.1016/j.cageo.2004.03.012>.

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5.26 score 1 stars 301 downloads

blueterra - Process-Oriented Geomorphometry for Submerged Terrain

Derives, organizes, summarizes, and visualizes terrain metrics from bathymetric and elevation rasters for submerged-terrain geomorphometry. Tools support terra-based raster preparation, slope and aspect decomposition, terrain position, rugosity, a four-neighbor Laplacian-style index, depth-band summaries, transect extraction, isobath-corridor analysis, table preparation, visualization, and aligned user-defined metric layers. Methodological context for geomorphometric terrain analysis is provided by Lindsay (2016) <doi:10.1016/j.cageo.2016.07.003>.

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4.90 score 1 stars

pointcoral - Local Point-Count Processing for Coral Photoquadrats

Imports Coral Point Count with Excel extensions (CPCe) point-count annotations and related exported tables, standardizes labels with a user-supplied crosswalk, creates ecological cover summaries, writes quality-control overlays, and exports machine-learning-ready point labels, image patches, sparse masks, and train/validation/test splits. The package is fully local and does not depend on third-party web platforms, user accounts, or other closed services. CPCe methods are described by Kohler and Gill (2006) "Coral Point Count with Excel extensions (CPCe): A Visual Basic program for the determination of coral and substrate coverage using random point count methodology" <doi:10.1016/j.cageo.2005.11.009>.

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4.18 score 1 stars 384 downloads