---
title: "1. The method of delineation"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{1. The method of delineation}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include=FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

rcrisp implements a spatial morphological method of delineation ([Forgaci, 2018](https://doi.org/10.7480/abe.2018.31)) that considers both the terrain of the river valley and the configuration of the urban fabric, as shown in the diagram below.

```{r fig.align='center', fig.alt='Diagram of the method of delineation', echo=FALSE, out.width="100%"}
knitr::include_graphics("img/method-diagram.png")
```

The method consists of the following steps, each explained on this website in a separate article:

1. The **valley** is delineated using a cost distance accumulation analysis on a Digital Elevation Model, as shown in `vignette("valley-delineation")`. The resulting valley edge is used as one of the inputs in the next step.

2. The urban **corridor** surrounding the river is delineated on the street network along a path following road centrelines that is closest to the valley edge, as shown in `vignette("corridor-delineation")`.  

3. The delineated corridor is divided into **corridor segments** bounded by the main transversal streets, as shown in `vignette("corridor-segmentation")`.  

4. The **river space**, i.e., the space between the river and the first line of buildings is determined, as shown in `vignette("riverspace-delineation")`.