1: Arc Coordinates									2: Arc-Node List							3: Polygon-Arc List								4: Poly Left-Right List								5: Node-Edge (Arc) List
Arc		coordinates							Arc		From		To			Poly		Arcs						Arc		Left		Right				Node		Edges (Arcs)
a		11,0  0,0  0,10							a		4		1			0		-a, -b, -c, -d						a		0		110				1		a, -b, -e
b		0,10  0,15  17,15							b		1		2			102		b, -f, -e						b		0		102				2		b, -c, f
c		17,15  20,15  20,10							c		2		3			104		c, -k, -j, f						c		0		104				3		c, -d, k
d		20,10  20,0  11,0							d		3		4			106		d, -h, i, k						d		0		106				4		-a, h, d
e		0,10  11,10							e		1		6			108		-g, j, -i						e		102		110				5		g, -i, -h
f		11,10  11,14  17,15							f		6		2			110		a, e, g, h, 0, -l						f		102		104				6		e, -f, -j, -g
g		11,10  11,6							g		6		5			112		l						g		108		110				7		i, j, -k
h		11,6  11,0							h		5		4			Note that 0 (zero) indicates								h		106		110				8		l, -l
i		11,6  17,10							i		5		7			an island polygon follows								i		108		106
j		11,10  17,10							j		6		7											j		104		108
k		17,10  20,10							k		7		3											k		104		106
l		8,3  3,3  3,7  8,3							l		8		8											l		110		112
Map extents are: 0,0 & 20, 15
																									MAP AREA
QUESTIONS:																0, 15																				20,15
1)  Are polygons 106 & 102 neighbours?
2)  Give all the neighbours of polygon 108.
3)  Which polygon occupies the SW corner?
4)  Are there any island polygons?  If so, name the
island polygon and the polygon that contains it.
5)  What other arcs (e.g. roads) join arc 'e' at node 6?
(i.e. what routing choices do you have at this point?)
6)  List a set of arcs that connect node 1 to node 5.
After attempting the questions above, draw the map
in the space to the right (map is drawn on next sheet)																0, 0																				20, 0