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Canadian Geospatial Data Infrastructure (CGDI) Data Alignment Layer
Entry ID: CANADA_CTI_CGDI_CanDataAlignLay


Summary
Abstract: Presently, the Centre for Topographical Information in Sherbrooke
(CTI-S) distributes nine different digital products, each meant for a specific
use. They include: NTDB, Administrative Boundaries, VMap, Toporama, Canada3D,
CDED, ADRG, URN, CDAL and CanImage.

CDAL - the Canadian Geospatial Data Infrastructure (CGDI) Data
Alignment Layer, is a base of reliable georeferenced points available to
geospatial data users for data correction. The CDAL points enable users to
simultaneously display data from various sources and data produced at different
scales or resolutions. The product is accessible free of charge via the
Internet and enables integration of multiple source data.

Provincial, territorial and municipal mapping organizations are
encouraged to enrich the CDAL through the addition of reference points or
complementary information that increases the positional accuracy of existing
points.

The CDAL includes easily identifiable points at various scales that
can be used to georeference both raster and vector digital data from different
sources.

CDAL:

- provides fast and free access to detailed information and accurate
data that can be downloaded from our web site.

- makes it easier to superimpose, integrate, and correct heterogeneous
data.

- promotes the harmonization of your data with other databases,
including the National Topographic Data Base (NTDB).

- opens a window on data from participating organizations.

Point definitions include:

- Road and railway network intersections.
- Centers of lakes and islands.
- Readily identifiable points (bridges, towers, lighthouses,etc.).

Point Features include:

- Unique identifier.
- Longitude and latitude based on NAD83.
- Elevation, horizontal and vertical accuracy, data validation date,
supplier's name, etc.
- Complies with ISO/TC211 standards.

The CDAL coverage has:

- Complete coverage of Canadian territory at 1:250,000.
- About 50% coverage of Canadian territory (nearly all inhabited
regions) at 1:50,000.
- Other scales contingent on organization participation.

To provide a common base for all producers and users of geospatial
data.

Spatial Data Organization Information -

Indirect Spatial Reference: NTS Map Sheet or Administrative Units
Direct Spatial Reference:
Ground Control Points (Lat./Long. Coordinates and Rectangular Grid)

Spatial Reference Information -
Horizontal Coordinate System Definition -
Planar -

Map Projection Name: Transverse Mercator



Planar Coordinate Encoding Method:
Coordinate Representation:
Abscissa Resolution:
Ordinate Resolution:
Distance and Bearing Representation:
Distance Resolution:
Bearing Resolution:
Bearing Units:
Bearing Reference Direction:
Bearing Reference Meridian:
Planar Distance Units:

Geodetic Model:
Horizontal Datum Name: NAD 83
Ellipsoid Name: GRS80
Semi-major Axis:
Denominator of Flattening Ratio:

Related URL
Link: View Related Information
Description: GeoConnections Discovery Portal. Canada's IDN Node.


Geographic Coverage
 N: 84.0 S: 41.0  E: -52.0  W: -141.0

Data Set Citation
Dataset Originator/Creator: Government of Canada, Natural Resources Canada, Centre for Topographic Information (Sherbrooke)
Dataset Title: Canadian Geospatial Data Infrastructure (CGDI) Data Alignment Layer
Dataset Publisher: Gov Canada, NRCAN, Centre for Topographic Information (Sherbrooke)
Online Resource: http://atlantis.chass.utoronto.ca/maplib/cgi-bin/datainventory.pl?d...


Temporal Coverage
Start Date: 1945-01-01


Location Keywords
CONTINENT > NORTH AMERICA > CANADA
CONTINENT > NORTH AMERICA > CANADA > Alberta
CONTINENT > NORTH AMERICA > CANADA > British Columbia
CONTINENT > NORTH AMERICA > CANADA > Manitoba
CONTINENT > NORTH AMERICA > CANADA > New Brunswick
CONTINENT > NORTH AMERICA > CANADA > Northwest Territories
CONTINENT > NORTH AMERICA > CANADA > Nova Scotia
CONTINENT > NORTH AMERICA > CANADA > Nunavut
CONTINENT > NORTH AMERICA > CANADA > Ontario
CONTINENT > NORTH AMERICA > CANADA > Prince Edward Island
CONTINENT > NORTH AMERICA > CANADA > Quebec
CONTINENT > NORTH AMERICA > CANADA > Saskatchewan
CONTINENT > NORTH AMERICA > CANADA > NEWFOUNDLAND AND LABRADOR
CONTINENT > NORTH AMERICA
GEOGRAPHIC REGION > MID-LATITUDE
GEOGRAPHIC REGION > NORTHERN HEMISPHERE
GEOGRAPHIC REGION > WESTERN HEMISPHERE


Science Keywords
BIOSPHERE >VEGETATION >VEGETATION COVER    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >BUILDINGS    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >COMMUNICATIONS    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >CULTURAL FEATURES    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >ELECTRICITY    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >PIPELINES    [Definition]
HUMAN DIMENSIONS >INFRASTRUCTURE >TRANSPORTATION    [Definition]
TERRESTRIAL HYDROSPHERE >SURFACE WATER >SURFACE WATER FEATURES >LAKES/RESERVOIRS    [Definition]
TERRESTRIAL HYDROSPHERE >SURFACE WATER >SURFACE WATER FEATURES >RIVERS/STREAMS    [Definition]
LAND SURFACE >LAND USE/LAND COVER >LAND USE/LAND COVER CLASSIFICATION    [Definition]
LAND SURFACE >GEOMORPHIC LANDFORMS/PROCESSES    [Definition]
LAND SURFACE >TOPOGRAPHY >TERRAIN ELEVATION    [Definition]


ISO Topic Category
BIOTA
ELEVATION


Access Constraints
Release and copyright conditions.


Use Constraints
None


Keywords
GCMD
none
ENERGY
GEOMATICS
HYDROGRAPHY
HYPSOGRAPHY
INFRASTRUCTURE
PLANIMETRY
TOPOLOGY
TRANSPORTATION
VECTOR DATA


Data Set Progress
IN WORK


Data Center
Centre for Topographic Information Sherbrooke, Natural Resources Canada    [Information]
Data Center URL: http://www.ctis.nrcan.gc.ca/

Data Center Personnel
Name: DANIEL CLAVET
Phone: +01-819-564-5600 extension 255
Fax: +01-819-564-5698
Email: daniel.clavet at nrcan.gc.ca
Contact Address:
2144 King St. West, Suite 010
City: Sherbrooke
Province or State: Quebec
Postal Code: J1J 2E8
Country: Canada



Distribution
Fees: Gratuit-Free


Personnel
DANIEL CLAVET
Role: DIF AUTHOR
Phone: +01-819-564-5600 extension 255
Fax: +01-819-564-5698
Email: daniel.clavet at nrcan.gc.ca
Contact Address:
2144 King St. West, Suite 010
City: Sherbrooke
Province or State: Quebec
Postal Code: J1J 2E8
Country: Canada


CUSTOMERS SUPPORT GROUP
Role: TECHNICAL CONTACT
Phone: +1-800-661-2638 (Canada and USA)
Fax: +01-819-564-5698
Email: ntdb at nrcan.gc.ca
Contact Address:
2144, King St. West, Suite 010
City: Sherbrooke
Province or State: Quebec
Postal Code: J1J 2E8
Country: Canada



Creation and Review Dates
DIF Creation Date: 2002-09-20
Last DIF Revision Date: 2016-01-27
Future DIF Review Date: 2006-01-22



Link to Web Site