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3. Manipulating Simple Features

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