Preparing a quote for a balcony

Here is the main information we need to prepare the quote:

1. the dimensions of the opening to be secured (perimeter, sides): width and height of each side
2. the elements to which we can attach the net: walls, floor, ceiling, railings, and the materials involved, e.g. brick wall, steel railing...
3. the presence of an awning and the space it takes up when closed/extended; does it extend beyond the perimeter of the balcony or terrace?
4. the presence of obstacles or unusual openings (for example: a large gap between the railing and the vertical side wall).
5. photos of each side, mainly where we will be able to attach the net or its supports (a video is also welcome).
6. Access: floor of the flat, stairs, lift,  access for our vehicle, etc.

Here are some examples of very useful sketches and information:

For a recessed balcony:

For a projecting balcony (here with 3 sides):

For a terrace with 2 sides