Introduction

Each coverage is divided into one or more Feature Classes. Each feature class is intended to comprise features that are closely related to one another, and all features within a given class must be of the same type. For example, political features are grouped into three feature classes, each with the prefix "polbnd" (political boundary) and with suffixes "p", "l" and "a" for point, line and area features respectively.

The table below gives a full list of the feature classes that are contained within each coverage. The feature classes provide the most convenient groupings of features for the purposes of MapLink, since the coverages are too few and the feature types too numerous to be used for this purpose.

Coverage			Feature Classes
	Point	Node	Line	Area	Text
bnd	polbndp		barrierl	oceansea	bndtxt
			coastl	polbnda
			depthl
			polbndl
dq			dqline	dqarea	dqtxt
elev	elevp	contourl
hydro	dangerp		aquecanl	inwatera	hydrotxt
	miscp		dangerl
			miscl
			watrcrsl
ind	extractp			extracta	indtxt
	misindp			fishinda
	storagep
phys	builtupp			builtupa	poptxt
			lndfrml	landicea
				seaicea
pop	builtupp			builtupa	poptxt
	mispopp			mispopa
trans	aerofacp	transtrc	mistranl		transtxt
	rryardp		railrdl
			roadl
			traill
			transtrl
util	utilp		pipel		utiltxt
			utill
veg				cropa	vegtxt
				rangea
				swampa
				treesa

The formal feature class names are unfortunately difficult to memorise, since they do not follow a consistent convention. Press on the coverage names for more details of the feature classes in each coverage.

Feature