Metadata: Nanaimo Lowlands Hydrogeological Units

Metadata NAP : more info

Identification

Abstract

This dataset shows the hydrostratigraphic units of the Nanaimo Lowland aquifer, British Columbia. The study area is from Nanoose Bay to Deep Bay, designating a low relief coastal strip along the southeastern part of Vancouver Island, BC. The hydrostratigraphic units were defined using the relation between geology and hydrogeological properties of materials that compose the aquifer system. The aquifer system is composed of 9 hydrostratigraphic units: 1) Capilano-Salish; 2) Capilano; 3) Vashon-Capilano; 4) Vashon; 5) Quadra; 6) Cowichan-Dashwood; 7) Dashwood-Mapleguard; 8) Bedrock - Lower Nanaimo Group and; 9) Bedrock - Metamorphic and Intrusive Basement.
Status:register completed
TitleNanaimo Lowlands Hydrogeological Units
Date2016-03-31 (register publication)
Date2016-02-03 (register revision)
Edition1
Edition date
Citation group
register pointOfContact
Name
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information
AddressDelivery point :
City :
Administrative region :
Postal code :
Country :
Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource
Citation group
register principalInvestigator
NameNicolas Benoît
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email nicolas.benoit@canada.ca
Telephonetelephone voice; 1 (418) 6543646
Online Resource
Citation group
register originator
NameNicolas Benoît
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email nicolas.benoit@canada.ca
Telephonetelephone voice; 1 (418) 6543646
Online Resource
Citation group
register custodian
NameFrancois Letourneau
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email francois.letourneau@canada.ca
Telephonetelephone voice; 1 (418) 6543826
Online Resource
Presentation formregister mapDigital
SeriesOther

Goals

This map was created to provide a regional frame of the spatial distribution of the hydrostratigraphic units and hydrogeological contexts within Nanaimo Lowland area.

Keyword(s)

Thesaurus
TitleGovernment of Canada Core Subject Thesaurus
Date2004 (register creation)
Date2013-05-11 (register publication)
Edition
Edition date
Citation group
register custodian
Name
OrganisationGovernment of Canada; Library and Archives Canada
Position
Information
Typeregister
TermHydrogeology
Spatial representationregister vector
Resolution175000
Languageeng; CAN
Languagefra; CAN
Character encodingutf8
Thematic categorygeoscientificInformation
ExtentLocalisation
-124.790612000,49.196682000;-124.108548000,49.465750000
Supplemental information

Distribution

Specific information related to data distribution
Format
NameWMS
Version1.3.0
Format
NameHTML
Version5
Format
NameCSV
Versionunknown
Format
NameJSON
Versionunknown
Format
NameGML
Versionunknown
Format
NameKML
Versionunknown
Format
Namedxf
Versionunknown
Format
NameSHP
Versionunknown
Format
NameSHP
Versionnot applicable

Distributor

Contact
register pointOfContact
Name
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information
AddressDelivery point :
City :
Administrative region :
Postal code :
Country :
Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource

Distributor

Contact
register distributor
NameEric Boisvert
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email eric.boisvert2@canada.ca
Telephonetelephone voice; 1 (418) 6543705
Online Resource

Transfer options


Quality


Quality description scope :register dataset

Lineage

Message Date lineage
Lineage is the description of the sources and steps used to create the current dataset.


Introduction
Process step Sources
The original datasets show a shapefile for the bedrock and a raster for each hydrostratigraphic unit. The raster was converted into vector, using the ""Raster to polygon"" conversion tool. If the raster was floating point file type, the ""Int"" tool was used to convert the floating point raster to an integer value. The raster can then be converted into polygons. The polygons were aggregate using the tool ""aggregate polygons"" with an aggregation distance of 50 m. The polygons considered as unnecessary (mainly one pixel isolated polygons) were selected by their area and erased of the attribute table. The polygons contours were generalized using the ""smooth polygon"" tool with PAEK algorithm and a smoothing tolerance of 200 m. After the files process to obtain hydrogeologic contexts, all the shapefiles obtained: hydrostratigraphic units (7); bedrock (1) and hydrogeologic contexts (4) were combine in one shapefile, using the merge tool. The identification of each polygon was done in the attribute table.
Benoit, N., Paradis, D., Bednarski, J.M., Hamblin, T., and Russell, H.A.J., 2015. Three dimensional hydrostratigraphic model of the Nanoose-Deep Bay area, Nanaimo Lowland, British Columbia; Geological Survey of Canada, Open File 7796, 1 .zip file. doi:10.4095/296302
The hydrogeologic contexts were presented by an image (Fi.8 of the cited article). First, the image was georeferenced with a shapefile of the study area delimitation. The image was georeferenced using the « Georeferencing » toolbar in ArcGis. To bring the image roughly in the right location, a ""fit to display"" was applied. Three control points were then created to perfectlty overstrike the image and the study area shapefile. To do so, the « add control points » tool was used. The study area shapefile was duplicated by exporting data. The hydrogeologic contexts were then defined using the ""cut polygons"" tool on the study area duplicate shapefile. Each hydrogeologic context was identified in the attribute table. After the files process to obtain hydrostratigraphic units shapefiles, all the shapefiles obtained: hydrostratigraphic units (7); bedrock (1) and hydrogeologic contexts (4) were combine into one, using the merge tool. The identification of each polygon was done in the attribute table.
Benoit, N., Paradis, D., Bednarski, J.M., Hamblin, T., and Russell, H.A.J., 2015. Three dimensional hydrostratigraphic model of the Nanoose-Deep Bay area, Nanaimo Lowland, British Columbia; Geological Survey of Canada, Open File 7796, 1 .zip file. doi:10.4095/296302


Technical details and constraints

File identifierfefec7a1-091c-6c6e-9521-e0623797edd7
Languageeng; CAN
Character encodingregister utf8
Hierarchical classificationregister dataset
Date2017-04-18
Metadata standardNorth American Profile of ISO 19115:2003 - Geographic information - Metadata
VersionCAN/CGSB-171.100-2009
Constraints
Update frequencyregister asNeeded

Regionalisation

Metadata are available in those languages (You can use language menu item in the top menu bar to switch language):
Language code Pays Encodage
register Frenchregister Canadaregister utf8

Geographic Reference System

Reference System codeEPSG:26910
Registerhttp://www.epsg-registry.org/
Version6.14

Metadata Contact

register pointOfContact
Name
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information
AddressDelivery point :
City :
Administrative region :
Postal code :
Country :
Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource
register author
NameFrancois Letourneau
OrganisationGovernment of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec
Position
Information
AddressDelivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage
City : Québec Québec
Administrative region : Québec Québec
Postal code :
Country : Canada Canada
Email francois.letourneau@canada.ca
Telephonetelephone voice; 1 (418) 6543826
Online Resource