---
title: "3. Manipulating Simple Features"
output:
  html_document:
    toc: true
    theme: united
vignette: >
  %\VignetteIndexEntry{3. Manipulating Simple Features}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r echo=FALSE}
knitr::opts_chunk$set(collapse = TRUE)
```

This vignetted describes how simple features can be manipulated,
where manipulations include

* type transformations (e.g., `POLYGON` to `MULTIPOLYGON`)
* affine transformation (shift, scale, rotate)
* transformation into a different coordinate reference system 
* geometrical operations, e.g. finding the centroid of a polygon, detecting whether pairs of features intersect, or find the union (overlap) of two polygons.

## Type transformations

## Affine transformations

## Coordinate reference systems conversion and transformation

## Geometrical operations
