Hydrology: Hydrologic Zone Boundaries of British Columbia

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Published by the Ministry of Environment and Climate Change Strategy - Knowledge Management
Licensed under Open Government Licence - British Columbia

Zones that represent areas of homogeneous hydrologic and geomorphological characteristics

Data and Resources

Dataset Extent

Latitude: 48.0° to 60.0°
Longitude: -139.5° to -113.5°

Additional Information

Purpose

To estimate streamflows, flooding, annual runoff

Lineage Statement

Hydrologic zone boundaries were digitized from 1:600,000 hardcopy maps. Coastline & islands were copied from 1:50K BC WSA. Linework updated January 2003. Polygons & Regions built September 20, 2004. Boundaries accuracy is +/- 1 kilometre based on hydrologic maps, graphical plots, & previous definitions.

Contact Information

NameAshfaque Ahmed (pointOfContact)
EmailAshfaque.Ahmed@gov.bc.ca
OrganizationMinistry of Environment and Climate Change Strategy
Sub-OrganizationKnowledge Management

Access & Security

Who can view this dataset? Public
Who can download this dataset?Public

Metadata Information

Record Published 2011-03-09
Record Last Modified 2019-05-04
Resource Status completed

Object Description

Object Name: WHSE_WATER_MANAGEMENT.HYDZ_HYDROLOGICZONE_SP

Short Name: HYD_BC_H_Z
Comments: Hydrologic zone boundaries were digitized from 1:600,000 hardcopy maps.

Column Name Short Name Data Type Data Precision Comments
HYDROLOGICZONE_SP_ID HYDZN_SPID NUMBER 10 Primary unique numeric identifier for a Hydrological Zone Polygon.
FEATURE_CODE FEAT_CODE VARCHAR2 10 A standard numeric code to identify the type of feature represented by the spatial data.
HYDROLOGICZONE_NO HYDZN_NO NUMBER 10 A numeric identifier assigned to a zone that represents an area of homogenous hydrologic and geomorphological characteristics.
HYDROLOGICZONE_NAME HYDZN_NAME VARCHAR2 100 A descriptive name, assigned to a zone having a numeric identifier and that represents an area of homogenous hydrologic and geomorphological characteristics.
FEATURE_AREA_SQM NUMBER 19 FEATURE_AREA_SQM is the system calculated area of a two-dimensional polygon in square meters
FEATURE_LENGTH_M NUMBER 19 FEATURE_LENGTH_M is the system calculated length or perimeter of a geometry in meters
GEOMETRY GEOMETRY SDO_GEOMETRY 1 GEOMETRY is the column used to reference the spatial coordinates defining the feature.
OBJECTID OBJECTID NUMBER 38 OBJECTID is a required attribute of feature classes and object classes in a geodatabase.
SE_ANNO_CAD_DATA BLOB 4000 SE_ANNO_CAD_DATA is a binary column used by spatial tools to store annotation, curve features and CAD data when using the SDO_GEOMETRY storage data type.