[DOC] Add Notebook to illustrate exporting shapefiles from GemPy geological maps and section lines

[KetMic]

Is your feature request related to a problem? Please describe.
Add notebook to illustrate exporting GemPy section lines and geological maps to shapefiles.

Describe the solution you'd like
Upload a notebook showing how to export

1. GemPy section lines as shapefile:

from shapely.geometry import LineString
gdf_sections = geo_model.grid.sections.df.copy(deep=True)
gdf_sections.reset_index()
linestrings = [LineString((gdf_sections.iloc[i]['start'],gdf_sections.iloc[i]['stop'] )) for i in range(len(gdf_sections))]
gdf_sections_new = gpd.GeoDataFrame(geometry=linestrings, data= gdf_sections.reset_index()[['index']], crs='EPSG:32632')
gdf_sections_new.to_file(file_path + 'test_sections.shp')

2. GemPy geological map polygons as shapefile:

gdf = gg.postprocessing.extract_lithologies(geo_model, geo_model.grid.regular_grid.extent[:4], crs='EPSG:32632')
gdf.to_file(file_path + 'test.shp')

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[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[AlexanderJuestel]

Tutorial was added: https://gemgis.readthedocs.io/en/latest/getting_started/tutorial/61_Exporting_geological_map_and_custom_sections_from_GemPy.html