---
id: extent_with_padding_py_geo
name: extent_with_padding
kind: function
lang: py
domain: geo
version: "1.0.0"
purity: pure
signature: "extent_with_padding(bounds: tuple[float, float, float, float], pad_ratio: float = 0.05) -> tuple[float, float, float, float]"
description: "Expande un bounding box (minx,miny,maxx,maxy) anadiendo un margen proporcional. La salida es (minx-padx, maxx+padx, miny-pady, maxy+pady)."
tags: [geo, bbox, extent, padding, matplotlib]
uses_functions: []
uses_types: []
returns: []
returns_optional: false
error_type: ""
imports: []
example: |
  from geo.extent_with_padding import extent_with_padding
  extent = extent_with_padding((0.0, 0.0, 10.0, 10.0), 0.1)
  # (-1.0, 11.0, -1.0, 11.0)
tested: true
tests: ["bbox_cuadrado_con_10_pct", "pad_ratio_cero_no_cambia"]
test_file_path: "python/functions/geo/tests/test_extent_with_padding.py"
file_path: "python/functions/geo/extent_with_padding.py"
params:
  - {name: bounds, desc: "bounding box de entrada como tupla (minx, miny, maxx, maxy)"}
  - {name: pad_ratio, desc: "fraccion del ancho/alto a anadir como margen por cada lado; por defecto 0.05 (5%)"}
output: "tupla (minx-padx, maxx+padx, miny-pady, maxy+pady) con el extent expandido"
source_repo: "internal:footprint_aurgi"
source_license: "internal-aurgi"
source_file: "ponderacion_isochronas/src/reporte_clientes_aurgi.py:90"
---

## Ejemplo

```python
from geo.extent_with_padding import extent_with_padding

extent_with_padding((0.0, 0.0, 10.0, 10.0), 0.1)
# (-1.0, 11.0, -1.0, 11.0)
```

## Notas

El orden de salida (minx, maxx, miny, maxy) es el que espera matplotlib ax.set_xlim/set_ylim.