New Zealand Topographic Data Dictionary

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For more information contact the New Zealand National Topo/Hydro Authority. Please note: the metadata presented here is prior to changes agreed with ICSM members and is therefore subject to alteration. Please read the Explanatory Page for explanations of the fields, abbreviations and symbols which have been used.

Object_class	Entity_class	Additional entity class	Object Inheritance
contour	GROUND SURFACE	Not applicable	graphic_line
Object description
An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum.
Map image		Digital data image

Click to enlarge map		Click to enlarge diagram
Comments:
Contours are logically consistent in their relationship with surrounding contours, height_pnts and coastline.
Entity Source	Classification	Seed class	Last updated	Edition number
US Standard Entity	50k topo	not_applicable	30/06/2003	4

Associated Objects

(Where applicable)

coastline

height_pnt

sinkhole_pnt

Object Attributes

(Where applicable)

Attribute

Data type

Attribute description

Attribute values

contour designation

string

A contour added extra to the usual contour interval, added usually only over extensive areas of very low relief.

supplementary

{empty}

contour natural formation

string

Used to depict depressions in the earth surface.

depression

{empty}

elevation

real

The height of the object above a vertical datum.

"20"

"40"

"60"

contour definition

string

An indefinite entry is used where the position of the object being described cannot be placed within the usual accuracy tolerances.

indefinite

{empty}