Generate recording coverage shapefile

[CameronBodine]

Is your feature request related to a problem? Please describe.
Need an ability to export sonar recording coverage as a shapefile. This could be manually edited to define an AOI, for use with new clip workflow (#110).

Describe the solution you'd like
A simple utility to automatically export coverage as a polygon shapefile and the trackline as a point shapefile.

Additional context
Related issues: #110

[CameronBodine]

Testing workflow on this sample:

[CameronBodine]

Output from generating coverage and trackline:

[CameronBodine]

Coverage polygon is manually edited to exclude pings outside the AOI (green points). Only selected (blue points) will be included in resulting mosaic.

[CameronBodine]

Clipped transects

[CameronBodine]

Transects mosaic into single geotiff

Detail