Freshwater Atlas Assessment Watersheds

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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

Assessment Watersheds are mesoscale aquatic units designed to replace the 3rd order 1:50K watersheds. Assessment Watersheds are based on groupings of fundamental watersheds using FWA watershed code and local code, with a target size of between 2,000ha and 10,000ha.

Data and Resources

Dataset Extent

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

Additional Information

Purpose

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.

Contact Information

NameGeoBC Inquiries (pointOfContact)
EmailGeoBCInfo@gov.bc.ca
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development
Sub-OrganizationGeoBC
NameBrad Hlasny (pointOfContact)
EmailBrad.Hlasny@gov.bc.ca
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development
Sub-OrganizationGeoBC

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 onGoing

Object Description

Object Name: WHSE_BASEMAPPING.FWA_ASSESSMENT_WATERSHEDS_POLY

Short Name: FWA_ASS_WS
Comments: Contains an aggregate of watershed polygons in an attempt to create a standard "assessment sized" watershed suitable for analytical purposes. This layer mimics the 1:50K 3rd order watershed polygon layer. May contain multipart geometries. Spatial type: multipart polygon.

Column Name Short Name Data Type Data Precision Comments
WATERSHED_FEATURE_ID WTRSHD_FID NUMBER 18 A unique identifier for each watershed in the layer.
WATERSHED_GROUP_ID WTRSHD_GRI NUMBER 18 An automatically generate id that uniquely identifies the watershed group feature.
WATERSHED_TYPE WTRSHD_TY VARCHAR2 1 The type of watershed. This has yet to be determined for FWA version 2.0.0, but possible values may include: 'R' - real watershed, 'F' - face unit watershed, 'W' - waterbody watershed, etc.
GNIS_ID_1 GNIS_ID_1 NUMBER 10 The first BCGNIS (BC Geographical Names Information System) feature id associated with the watershed key of the principal watershed.
GNIS_NAME_1 GNIS_NM_1 VARCHAR2 80 The first BCGNIS (BC Geographical Names Information System) name associated with the watershed key of the principal watershed.
GNIS_ID_2 GNIS_ID_2 NUMBER 10 The second BCGNIS (BC Geographical Names Information System) feature id associated with the watershed key of the principal watershed.
GNIS_NAME_2 GNIS_NM_2 VARCHAR2 80 The second BCGNIS (BC Geographical Names Information System) name associated with the watershed key of the principal watershed.
GNIS_ID_3 GNIS_ID_3 NUMBER 10 The third BCGNIS (BC Geographical Names Information System) feature id associated with the watershed key of the principal watershed.
GNIS_NAME_3 GNIS_NM_3 VARCHAR2 80 The third BCGNIS (BC Geographical Names Information System) name associated with the watershed key of the principal watershed.
WATERBODY_ID WTRBD_ID NUMBER 10 If the principal watershed is made up of a lake or river, this field will contain the waterbody id associated with that waterbody, otherwise it will be null.
WATERBODY_KEY WTRBD_KEY NUMBER 10 If the principal watershed is made up of a lake or river, this field will contain the waterbody key associated with that waterbody, otherwise it will be null.
WATERSHED_KEY WTRSHD_KEY NUMBER 10 The watershed key associated with the watershed polygon (and watershed code).
FWA_WATERSHED_CODE WTRSHD_CD VARCHAR2 143 The 143 character watershed code associated with the watershed polygon.
LOCAL_WATERSHED_CODE L_WTRSHD_C VARCHAR2 143 A 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 WTRSHD_GRC VARCHAR2 4 The watershed group code associated with the polygon.
LEFT_RIGHT_TRIBUTARY LFT_RGHT_T VARCHAR2 7 A value attributed via the watershed code to all watersheds indicating on what side of the watershed they drain into.
WATERSHED_ORDER WTRSHD_OR NUMBER 10 The maximum order of the watershed key associated with the principal watershed polygon.
WATERSHED_MAGNITUDE WTRSHD_MAG NUMBER 10 The maximum magnitude of the watershed key associated with the principal watershed.
LOCAL_WATERSHED_ORDER L_WTRSHD_O NUMBER 10 The order associated with the local watershed code.
LOCAL_WATERSHED_MAGNITUDE L_WTRSHD_M NUMBER 10 The magnitude associated with the local watershed code.
AREA_HA AREA_HA NUMBER 38 Area of the watershed, in hectares.
FEATURE_CODE F_CODE VARCHAR2 10 FEATURE CODE contains a value based on the Canadian Council of Surveys and Mapping's (CCSM) system for classification of geographic features.
GEOMETRY GEOMETRY SDO_GEOMETRY 1
OBJECTID OBJECTID NUMBER 38
SE_ANNO_CAD_DATA BLOB 4000
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