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geomorphR

A focused R package for extracting geometric and morphological features from polygon and multipolygon building footprints represented in sf objects.

Overview

The objective is to provide a clean, transparent, reproducible API to compute raw geometric and morphology descriptors that can feed further spatial or machine-learning workflows.

Installation

Install directly from GitHub with:

if (!requireNamespace("remotes", quietly = TRUE)) {
  install.packages("remotes")
}

remotes::install_github("YOUR_USERNAME/geomorphR")

Example

library(sf)
library(geomorphR)

geojson_path <- system.file("extdata", "central_gbg.geojson", package = "geomorphR")
buildings <- sf::st_read(geojson_path)
features <- extract_geometric_features(
  buildings,
  height_col = "height_m",
  floors_col = "floor_count",
  orientation_col = "orientation_degrees",
  gfa_col = "gfa_m2",
  plot_area_col = "plot_area_m2",
  verbose = FALSE,
  use_parallel = FALSE
)

Building morphology attributes

Attribute-based metrics are opt-in because datasets use different field names. Pass the source columns explicitly:

features <- extract_geometric_features(
  buildings,
  height_col = "height_m",
  floors_col = "floor_count",
  gfa_col = "gfa_m2",
  plot_area_col = "plot_area_m2",
  verbose = FALSE
)

The function adds building volume, floor height, GFA, FSI, coverage ratio, height-to-width ratio, and orientation in degrees. If no orientation column is supplied, orientation is estimated from the minimum rotated rectangle. Use validate_morphology_columns() to inspect whether source fields exist and are numeric before extraction.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.