Hypotactic Elaborating Clause Nexus With 'As'

It is a large construction	as can be seen from its 15 cloisters, 13 oratories, 86 staircases, 88 fountains, more than 1,600 paintings, 9 towers and 73 sculptures
a	= b

Cf

It is a large construction, which can be seen from its 15 cloisters, 13 oratories, 86 staircases, 88 fountains, more than 1,600 paintings, 9 towers and 73 sculptures

Identifying Clause Of Possession: Benefaction

The hop-on hop-off ticket	allows	you	the freedom to leave and re-join the bus as often as you like
Token	Process: possession	Beneficiary	Value

See Halliday & Matthiessen (2004: 246).

Assigner Realised As Angle: viewpoint

This magical city	is	a must see	for many tourists [[visiting Galicia]]	and	a welcome site	for the many pilgrims [[ending their Camino de Santiago]]
Token	Process	Value	Angle: viewpoint		Value	Angle: viewpoint

cf

Many tourists [[visiting Galicia]]	think	this magical city	a must see	and	the many pilgrims [[ending their Camino de Santiago]]	think	it	a welcome site
Assigner	Process	Token	Value		Assigner	Process	Token	Value

The clauses are identifying rather than attributive because, inter alia, they are reversible:

for many tourists [[visiting Galicia]] a must see is this magical city

for the many pilgrims [[ending their Camino de Santiago]] a welcome site is this magical city

(Note that here each Token attracts the tonic, which means it also functions as Identifier, which means the clauses are encoding not decoding.)

Mental Clause With Metaphor Unpacked

you	'll get	a bird's-eye view [of this majestic city]
Senser	Process: mental	Phenomenon

cf

you	'll see	this majestic city	from a bird's-eye view
Senser	Process: mental	Phenomenon	Angle: viewpoint

Angle: viewpoint is agnate with the Senser of a mental clause (Halliday & Matthiessen (2004: 276):

you	'll see	this majestic city	as	a  bird	sees	it
Senser	Process: mental	Phenomenon		Senser	Process: mental	Phenomenon

a	bird’s eye	view	of this majestic city
Deictic	Classifier	Thing	Qualifier	metaphorical
Senser		Process	Phenomenon	congruent

Halliday & Matthiessen (2004: 294):

[In the like [‘emanating’] type of mental process] the Phenomenon bears no kind of resemblance to a Goal.  But it does show certain affinities with the Scope.  It figures as Subject, in the ‘receptive’, under similarly restricted conditions; and it appears in expressions, such as enjoy the pleasure, saw the sight, have an understanding of, which are analogous to material Scope expressions of the ‘process’ type, such as play a game, have a game.  So we can interpret the rôle of the Phenomenon in the like type of mental process as a counterpart of that of Scope in the material; it is the element which delimits the boundaries of the sensing.