Crown Registry and Geographic Base

Corporate Watershed Base Products

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Overview Product Description Access and Distribution Program Area Copyright

Overview

The Corporate Watershed Base (CWB) formerly known as the TRIM Watershed Atlas (TWA) is a watershed atlas that defines watersheds and provides an associated stream and lake network for water management and fisheries information.

The CWB adds functionality to TRIM 1:20 000 digital topographic base map data for the entire Province of British Columbia in order to provide:

  • An intelligent, connected feature-coded stream network essential for GIS analysis and presentation of hydrographic information for use in allocation decisions, planning processes and environmental monitoring; and
  • Associated watershed boundaries.

The CWB is derived from TRIM1 mapping.

Product Description

Data Product

Description

CWB v1.1
  • Linework for streams, waterbodies (lakes, double-line rivers, manmade waterbodies, and wetlands) and islands
  • Linework for stream/lake skeletons
  • Polygonal features for waterbodies, island, channels, bays, and glaciers
  • A unique identifier for each feature and line
  • A reference linking the 1:20K features to the corresponding 1:50K WSA feature where applicable
  • Feature names for all named waterbodies, streams, islands, points, bays, channels, dams, rapids, falls as defined and linked back to BCGNIS Calculated Stream Order for all streams
  • Calculated Stream Magnitude for all streams /p>
  • Calculated hierarchical keys
  • Point features for obstacles (dams, rapids, etc.)
  • Integrated manual updates for Vancouver Island, Fraser, and Columbia regions (corrections for the Coast and Peace regions will be available in spring of 2008).

CWB v1.2
*Available in Sept/07
  • New watershed boundary linework, polygonal watershed features, and associated attributes

CWB v1.3
*Available in Nov/07
  • Raw stream elevation, monotonically decreasing smoothed stream elevation on all stream and waterbody features
  • Gradient information associated with all streams

BC-National Hydrographic Network (BC-NHN)

 
  • Linework for streams, waterbodies (lakes, double-line rivers, manmade features), and islands
  • Linework for stream and lake skeletons
  • Polygonal features for waterbodies, islands, channels, and bays
  • A unique identifier for each feature
  • Dams, Rapids, Falls, Wharfs, Docks, Slips, Dykes entities and generated events
  • Feature names for named waterbodies, streams, islands, points, bays, channels, manmade entities, obstacles entities

Access and Distribution

Product Access Type Access Method Available to
CWB Download Land and Resource Data Warehouse

 

or

 

Contact cwbinfo@gov.bc.ca / 250-387-1442

 

 IDIR Users, other public agencies and non-profit groups
View Land and Resource Data Warehouse

 

 General Public
BC-NHN View or Download GeoBase General Public

Program Area

The Corporate Watershed Base program is part of the Base Mapping program area.

Copyright

All Crown Registry and Geographic Base information products are protected by Province of British Columbia Crown Copyright. Read more >>