Update method vignette

_pkgdown.yml

@@ -19,7 +19,7 @@ navbar:
     articles:
       text: Articles
       menu:
-        - text: 1. Method
+        - text: 1. The method
           href: articles/method.html
         - text: 2. Corridor delineation
           href: articles/corridor-delineation.html

vignettes/method.Rmd

@@ -7,14 +7,23 @@ vignette: >
   %\VignetteEncoding{UTF-8}
 ---
 
-```{r, include = FALSE}
+```{r, include=FALSE}
 knitr::opts_chunk$set(
   collapse = TRUE,
   comment = "#>"
-  , eval = FALSE  # temporarily disable evaluation
 )
 ```
 
-```{r setup}
-library(CRiSp)
+CRiSp implements a spatial morphological method of delineation (Forgaci, 2018) that considers both the terrain of the river valley and the urban fabric, as shown in the diagram below.
+
+```{r fig.align='center', fig.alt='Diagram of the method of delineation', echo=FALSE}
+knitr::include_graphics("img/delineation.jpg")
 ```
+
+The method consists of three steps, each explained on this website in a separate article:
+
+1. The **corridor boundary** of the urban area surrounding the river is delineated on the street network considering a given **walkshed** (the urban area reached along the street network within a given walking distance from the river, 500m by default) and the **valley edge** derived from a digital elevation model, as shown in `vignette("corridor-delineation")`.
+2. The delineated corridor is divided into **corridor segments** bounded by the main transversal streets, as shown in `vignette("corridor-segmentation")`.
+3. The **river space**, i.e., the space between the river and the first line of buildings is determined, as shown in `vignette("riverspace-delineation")`.
+
+