Watercourses - 1M

ISO-19139 Metadata

Metadata Information

Metadata language: eng
Metadata character set: utf8
Last update: 2020-12-05
Metadata maintenance:
Update frequency: asNeeded
Metadata contact:
Role: custodian
Organization's name: Geomatics Yukon – Government of Yukon
Contact information:
Address:
e-mail address: geomatics.help@gov.yk.ca
Scope of the data described by the metadata: dataset
Scope name: dataset
Name of the metadata standard used: ISO 19139 Geographic Information - Metadata - Implementation Specification
Version of the metadata standard: 2007
Metadata identifier: A95342E3-0997-4FB8-AE18-DB405DD75A4C

Data Identification Information

Resource citation:
Title: Watercourses - 1M
Alternate title: CSW_BASE.WATERCOURSE_LN_1M_SVW
Date:
Reference date - publication: 2003-01-01
Presentation format: mapDigital
Series:
Name: Atlas Frameworks
Issue: V5.0
Cited responsible party:
Role: originator
Organization's name: Government of Canada, Natural Resources Canada, Canada Centre for Remote Sensing, The Atlas of Canada
Cited responsible party:
Role: originator
Organization's name: Geomatics Yukon – Government of Yukon
Cited responsible party:
Role: publisher
Organization's name: Government of Canada
Contact information:
Address:
Delivery point: Ottawa, Ontario, Canada
Themes or categories of the resource: inlandWaters
Descriptive keywords:
Place keywords:
Keywords: Y.T., Yukon, Yukon Territory
Descriptive keywords:
Theme keywords:
Keywords: Watercourse, River, Stream, Drainage network
Descriptive keywords:
Keyword type not provided
Keywords: Downloadable Data
Keyword thesaurus:
Citation reference: 723f6998-058e-11dc-8314-0800200c9a66
Abstract: Atlas of Canada National Frameworks data are standardized national coverages of commonly used geospatial datasets at the 1:1 000 000 scale. The Drainage Network Skeleton dataset is comprised of linear features: single line rivers, flow lines within waterbodies and ocean coastlines. Flow lines within waterbodies are virtual linear features representing the hydrological flow through area features (e.g. lakes, rivers and intermittent waterbodies). These flow lines complete the linear network where rivers would run through lakes, permitting hydrologic network analysis and cartographic generalization. This dataset is required for analytical applications. The coastline component of the Drainage Network Skeleton also delineates oceanic islands. The National Scale Frameworks Hydrology data consists of area, linear and point geospatial and attribute data for Canada's hydrology at a national scale. It provides a representation of Canada's surface water features, and data completeness reflects the content of the source, the original Vector Map level 0 (VMAP0) revision 4 hydrographic layers, except where revision editing has been performed. Key value-added characteristics include river flow direction, connectivity and the tagging of geographical name keys to selected rivers, lakes and islands included in the Concise Gazetteer of Canada.The Atlas Frameworks are a set of integrated base map layers which form part of a larger National Scale Frameworks data collection. These data have been compiled at a scale of 1:1 000 000 with the primary goal being to indicate correct relative positioning with other framework layers rather than absolute positional accuracy.Distributed from GeoYukon by the Government of Yukon. Discover more digital map data and interactive maps from Yukon's digital map data collection.For more information: geomatics.help@gov.yk.ca
Purpose: The Drainage Network Skeleton dataset is comprised of linear features: single line rivers, flow lines within waterbodies and ocean coastlines at 1M scale. Flow lines within waterbodies are virtual linear features representing the hydrological flow through area features (e.g. lakes, rivers and intermittent waterbodies).
Dataset language:eng
Dataset character set: utf8
Status: completed
Resource maintenance:
Update frequency: asNeeded
Resource constraints:
General constraints:
Limitations of use: Open Government Licence - Canada (https://open.canada.ca/en/open-government-licence-canada)
Aggregated resource information:
Aggregate dataset name:
Title: National Scale Frameworks Hydrology - Drainage Network, Canada
Date:
Reference date - publication: 2003-01-01
Association type: largerWorkCitation
Spatial representation type: vector
Processing environment: Esri ArcGIS 10.4.1.5686
Resource extent:
Geographic element:
Bounding rectangle:
Extent contains the resource: true
West longitude: -163.8945
East longitude: -97.543336
North latitude: 75.641274
South latitude: 53.654398
Resource extent:
Geographic element:
Bounding rectangle:
Extent contains the resource: true
West longitude: -163.8945
East longitude: -97.543336
North latitude: 75.641274
South latitude: 53.654398
Resource extent:
Extent description: publication date
Temporal element:
Temporal extent:
2003-01-01T00:00:00
Resource extent:
Geographic element:
Bounding rectangle:
Extent contains the resource: true
West longitude: -163.8945
East longitude: -97.543336
North latitude: 75.641274
South latitude: 53.654398
Credits: Government of Yukon on behalf of Natural Resources Canada
Resource point of contact:
Role: pointOfContact
Organization's name: Geomatics Yukon – Government of Yukon
Contact information:
Address:
e-mail address: geomatics.help@gov.yk.ca

Spatial Representation

Vector Data

Level of topology for this dataset: geometryOnly
Geometric objects:
Object type: composite
Object count: 53638

Reference System Information

Reference system identifier:
Value: 0

Data Quality

Scope of quality information:
Level of the data:dataset
Resource lineage:
Lineage statement: An attribute was added to any watercourse that were of social or cultural importance. This attribute could be used for display of waterbodies at scales above 1:1,000,000
Process step:
Description: An attribute was added to define which watershed the watercourse was in based on the NSFD Watershed Code.
Process step:
Description: DCW data for Alaska was integrated into the NSFD data to ensure full coverage to the extents of the Yukon Governments data holdings (-155W, 55N to -115W, 70N). The additional information was attributed to follow the NSFD attributing scheme. The data was then clipped to -155W, 55N to -115W, 70N
Process step:
Description: The initial extraction from the source was done using the gettiles software. The gettiles software uses the arcinfo VPFIMPORT command to do the importing task for each tile. The tiles are then assembled. Feature Coding, Logical Checking and Assembly (Nov 1998) - Feature coding, logical checking and assembly were completed. Connectivity Check 1 (Dec 1998) - The connectivity was tested by using the ARC/INFO Network TRACE command. This allowed the user to select all the arcs connected to a particular feature. In this case, a first cut at the connectivity was attempted by determining which features were connected to the coastline. Features which were not connected to the coastline were visually inspected and corrected if deemed appropriate. Quality Control - (Dec 1998 - Jan 1999) - Internal drainage systems mostly on the prairies identified as systems that do not flow to the ocean and their sinks identified and coded on nodes or polygons/lakes where appropriate. Sources used NTS map sheets. It was determined that not all of the water redirections and reservoirs caused by the James Bay power project were represented in the VMAP data. Redigitization of some of these features was necessary (Caniapiscau Reservoir, for example). Sources used Hydro Quebec Map. Updated and highly accurate international boundary information was available from Legal Survey Division. This data was used to update the international boundary. In cases where the international boundary was defined as the centreline of a river, the hydrology layer had to be adjusted to match this. An area where the British Colombia border and the Alaska border reached the coastline was determined to be out positionally. This area was warped using links to correct positionality in relation to the international boundary. Sources International Boundary Commission. Connectivity Check 2 (Jan/Feb 1999) - The second connectivity check identified the individual river systems and by doing a statistical analysis those systems that do not drain to a known sink were identified. Directionality Checks (July 1999 - March 2000) - Using an internal software menu system directionality on rivers was automatically determined. The system was able to automatically assign directionality to approx 90% of the features in the hydrology network. A user then used the nettools menu to manually assign directionality to the remaining 10% of features. Many edits were made to the hydrology network during this phase as most of the areas where directionality was not automatically assigned had connectivity problems that needed to be fixed. These problems included areas of "floating drainage" that didn't have a coastal sink or drainage having more that one sink. Some areas of extremely sparse network connectivity were identified and river systems were added. These areas included south-western Nova Scotia and Storkerson Peninsula on Victoria Island, Nunavut. Skeletonization (July 1999 - March 2000) - For network analysis virtual features were generated through area features to seperate the linear network from the area network. The results of this step are 3 covers where there was 1 before: the linear network which includes the coastline, rivers and water area skeletons, the area features which includes areas of permanent and non-permanent water and then the island areas within fresh water lakes. Make_skel.aml Name Tagging 1 (July 1999 - March 2000) - A database link was created to the Canadian Geographical Names Database, the official repository for toponymy in Canada. The link was created by assigning features within the hydrology network with unique keys used in the Canadian Geographical Names Database (CGNDB). The unique keys to be assigned to features were extracted from a subset of the full CGNDB called the concise gazetteer. Automated procedures assigned names to features and a technician checked and either committed the name to the feature or did the necessary geometry editing to properly assign the name. The process of adding names to features served as yet another connectivity check on the hydrology network and many edits to improve connectivity were made to the hydrology during this step. Drainage Areas Edits (Sept 2001 - March 2003) - A parallel project was started to delineate drainage areas from the drainage network. During the course of this project many problems were discovered and fixed in the drainage network. These problems included errors in connectivity, directionality and feature coding (attributes). Splitting for Stations (Feb 2003 - March 2003) - Arcs in the skel layer were split to create nodes at gauging station locations to provide a link between the two datasets. Additional Attribution (Dec2002) - Two other sets of attributes were added to populate these attribute items. LAKEUID: This attribute, added to arcs in both the skel and isle covers, identifies the UID of the lake in which a given skeleton or lake arc falls. STREAM ORDERING ATTRIBUTES: basin, order1, order2, and order3. Together, they permit the user to trace upstream or downstream using a selection query. This scheme was chosen because it is independent of GIS software -- any software that can make selections based on attributes can perform stream tracing.
Source:
Level of the source data: Canada portion
Source citation:
Title: National Scale Frameworks Hydrology - Drainage Network, Canada
Date:
Reference date - publication: 2003-01-01
Source:
Level of the source data: Alaska portion
Source citation:
Title: Digital Chart of the World
Date:
Data quality report:
Completeness omission:
Measure produced by the test: Data completeness reflects the content of the original Vector Map level 0 (VMAP0) revision 4 hydrographic layers except where revision editing has been performed. The selection of features is intended for a scale of 1:1 000 000. All features have been assigned a Digital Geographic Information Exchange Standard (DIGEST) feature code, therefore the completeness of classification reflects the exhaustiveness of the standard's feature coding. Feature name database keys were assigned only to features that were included in the Concise Gazetteer of Canada.
Data quality result:
Data quality report:
Topological consistency:
Evaluation method: Using ESRI ArcGIS automated reporting, the following were tested for all features: a) arcs begin or end at nodes b) arcs connect to each other at nodes c) arcs do not extend past nodes d) polygons are closed e) All points, lines and polygons are topologically related. Where these statements for arc/node relationships were found to be false, manual editing was performed until automated reporting showed all to be true. Upon completion of all quality control procedures the entirety of this dataset is considered as topologically clean.
Data quality result:
Data quality report:
Conceptual consistency:
Measure produced by the test: Using ESRI ArcGIS automated reporting, the following were tested for all features: a) arcs begin or end at nodes b) arcs connect to each other at nodes c) arcs do not extend past nodes d) polygons are closed e) All points, lines and polygons are topologically related. Where these statements for arc/node relationships were found to be false, manual editing was performed until automated reporting showed all to be true. Upon completion of all quality control procedures the entirety of this dataset is considered as topologically clean.
Data quality result:
Data quality report:
Absolute external positional accuracy:
Evaluation method: This average positional accuracy estimate is based on tests performed on source data by the source agencies.
Data quality result:
Quantitative test results:
Value units:
Result value: 1200
Data quality report:
Quantitative attribute accuracy:
Measure produced by the test: Where applicable, attribute data were symbolized on-screen or as hard copy plots and inspected. Attribute data integrity was also verified using automated procedures to check for anomalies such as duplication of data in fields requiring unique vales and incorrect feature coding.
Data quality result:

Distribution Information

Distributor:
Distributor contact:
Role: distributor
Organization's name: Geomatics Yukon – Government of Yukon
Contact information:
Address:
e-mail address: geomatics.help@gov.yk.ca
Distribution format:
Format name: Feature Class
Format version:
Transfer options:
Online distribution information:
Online location: https://yukon.maps.arcgis.com/home/item.html?id=764bebddc400438cafd1cf34ccdccf01
Transfer options:
Online distribution information:
Online location: https://map-data.service.yukon.ca/GeoYukon/Base/Watercourses_1M/