[feature] adding functions to visualise and export the map data

[lachlangrose]

Add some helper functions

• functions for exporting the clipped map data with any augmentations into shapefiles.
• Plot shapefiles using the colour maps that has been extracted
• draw plot of stratigraphic column showing relative thicknesses

[RoyThomsonMonash]

This function exists for the plotting of clipped maps with the colourmap.
proj.draw_geology_map()
Also there is an optional parameter overlay="" which can be used to overlay the contacts, basal_contacts, orientations or faults

There is not a plotter of the stratigraphic column with thicknesses but you can get the strat column list via:
proj.stratigraphic_column.column

[lachlangrose]

@RoyThomsonMonash thanks I hadn't seen those functions, its what I needed.

I will add a similar one for the stratigraphic column

[RoyThomsonMonash]

There is a function in map_data that exports the raw map data (save_raw_map_data), this could be modified to use self.data instead of self.raw_data if you want the current modifications (clipping and filters). Using a flag should be a quick fix, though you might need to check that the self.data variable is valid before trying to export it.

You can also export the current state of the geology map with its modifications (as a raster map) to a geoTiff with the proj.save_geotiff_raster function.
Included in the function parameters is a way to set the projection of the geoTiff so you can use it to create a map with a web specific projection such as EPSG 3857 for a google maps or open street maps overlay.