Freshwater Atlas Stream Network

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Published by the Ministry of Forests, Lands, Natural Resource Operations and Rural Development - GeoBC
Licensed under Open Government Licence - British Columbia

Flow network arcs (observed, inferred and constructed). Contains no banks, coast or watershed bourdary arcs. Directionalized and connected. Contains heirarchial key and route identifier

Data and Resources

Dataset Extent

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

Additional Information


This spatially-based information is typically used in allocation decisions, boundary definitions, planning processes and environmental monitoring, by internal and external stakeholders.

Lineage Statement

Automated, mathematical and statistical algorithms were applied against the TRIM I stream network and the TRIM I elevation surface model.

More Information

Contact Information

NameGeoBC Inquiries (pointOfContact)
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development

Access & Security

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

Metadata Information

Record Published 2011-03-09
Record Last Modified 2021-05-08
Resource Status onGoing

Object Description


Comments: Contains only flow network arcs (observed, inferred and constructed flows). Contains no banks, coast or watershed boundary arcs. Does not contain multipart geometries. Spatial geometry: simple line

Column Name Short Name Data Type Data Precision Comments
LINEAR_FEATURE_ID LNRFTRD NUMBER 18 A unique numeric identifier used to link the arc to the database.
WATERSHED_GROUP_ID WTRSHDGRPD NUMBER 18 An automatically generate id that uniquely identifies the watershed group feature.
EDGE_TYPE EDGE_TYPE NUMBER 10 A 4 digit numeric code used by the Freshwater Atlas to identify the various types of water network linear features. eg. 1050.
BLUE_LINE_KEY BLLNK NUMBER 10 Uniquely identifies a single flow line such that a main channel and a secondary channel with the same watershed code would have different blue line keys (the Fraser River and all side channels have different blue line keys).
WATERSHED_KEY WTRSHDK NUMBER 10 A key that identifies a stream system (for example the Fraser River mainstem and all its side channels the same watershed key). There is a 1:1 match between a watershed key and watershed code. The watershed key will match the blue line key for the mainstem.
FWA_WATERSHED_CODE FWWTRSHDCD VARCHAR2 143 A 143 character code derived using a hierarchy coding scheme. Approximately identifies where a particular stream is located within the province.
LOCAL_WATERSHED_CODE LCLWTRSHDC VARCHAR2 143 The 143 character code similar to the fwa watershed code that further subdivides remnant polygons to provide an approximate location along the mainstem.
WATERSHED_GROUP_CODE WTRSHDGRPC VARCHAR2 4 The watershed group code associated with the polygon.
DOWNSTREAM_ROUTE_MEASURE DWNSTRMRTM NUMBER 38 The distance, in meters, along the route from the mouth of the route to the feature. This distance is measured from the mouth of the containing route to the downstream end of the feature.
LENGTH_METRE LNGTHMTR NUMBER 38 The length in meters of the linear object.
FEATURE_SOURCE FTRSRC VARCHAR2 15 The source of the arc; where the feature was obtained or modified. eg. linear stream.
GNIS_ID GNIS_ID NUMBER 10 The BCGNIS (BC Geographical Names Information System) feature id.
GNIS_NAME GNIS_NAME VARCHAR2 80 The BCGNIS (BC Geographical Names Information System) name associated with the GNIS feature id (an English name was used where available, otherwise another language was selected).
LEFT_RIGHT_TRIBUTARY LFTRGHTTRB VARCHAR2 7 Describes which side of the local mainstem this tributary enters on. "LEFT" or "RIGHT" is assigned to all main-flow streams based on the angle of entry of the stream to its parent stream. If an observer was standing in the stream facing downstream, the bank on the left of the observer would be the left bank. Any stream entering the stream on the left is assigned a "LEFT" attribute. Left and right is determined by using the angles of hte upstream and downstream edges of the parent stream at the confluence.Streams that flow into the coastline are attributed as "NONE".Streams that flow out of the province and do not connect to any extrajurisdictional streams are attributed as "UNKNOWN".
STREAM_ORDER STRMRDR NUMBER 10 The calculated modified Strahler order.
STREAM_MAGNITUDE STRMMGNTD NUMBER 10 The calculated magnitude.
WATERBODY_KEY WTRBDK NUMBER 10 The waterbody key of the waterbody the edge is contained within.
BLUE_LINE_KEY_50K BLLNK50K NUMBER 10 The best matched blue line key from the 1:50K Watershed Atlas.
WATERSHED_CODE_50K WTRSHDCD50 VARCHAR2 45 The hierarchical identifier from the 1:50K Watershed Atlas associated with the blue line key 50k.
WATERSHED_KEY_50K WTRSHDK50K NUMBER 10 The 50K watershed key associated with the blue line key 50K from the 1:50K Watershed Atlas.
WATERSHED_GROUP_CODE_50K WTRSHDGRP1 VARCHAR2 4 The 50K group code associated with the 50K blue line key from the 1:50K Watershed Atlas.
GRADIENT GRADIENT NUMBER 38 The gradient of the stream.
FEATURE_CODE FTRCD VARCHAR2 10 FEATURE CODE contains a value based on the Canadian Council of Surveys and Mapping's (CCSM) system for classification of geographic features.
FEATURE_LENGTH_M FEAT_LEN NUMBER 19 FEATURE_LENGTH_M is the system calculated length or perimeter of a geometry in meters