Canadian Navigable Waters Act (CNWA) - Scheduled Waterways
- Lawrence Chong (Unlicensed)
Description
The Canadian Navigable Waters Act (CNWA) authorizes and regulates interferences with the public right to navigation. The primary purpose of the CNWA is to regulate works and obstructions that may interfere with navigation in Canada’s navigable waters.
The List of Scheduled Waters includes the busiest waterways in Canada for which regulatory approval is required for works that risk a substantial interference with navigation. The CNWA refers to “scheduled” and “non-scheduled” navigable waters to indicate waterways that are or are not listed on the schedule.
When a proponent submits a project for approval, whether it is in the vicinity of scheduled waters affects the owner’s obligation and option. Using this overlay, the NPP Officer can decide if the project requires further review and assessment.
Originator
Transport Canada, Programs Group, Navigation Protection Program.
Canada Open Data
TC Smart Maps
Use Cases
As an NPP Officer I want to be able to validate if the project is near an CNWA scheduled waterways so that I proceed with the project review.
Source(s)
Description | Source | Format | Date | Update Frequency | Metadata | Cost | Link | Remarks |
|---|---|---|---|---|---|---|---|---|
Scheduled Waterways | TC Smart Maps | SHP | 2015 | As needed | N/A | Free | EGIS Data Folder: CNWA_ScheduledWaters_Waterbody.gdb.zip |
|
Remarks
EGIS Data Folder: \\tc4s0e\groups\AFCC\EGIS\Smart maps GDB files\
Process for EGIS integration
Waterways Extraction:
CNWAA Scheduled Waterways hydrography extraction is a labour intensive process.
In Google Earth, National Hydro Network (NHN) 1:50,000 was used as a base and polygon boundaries were drawn to cover the extent of each segment of the waterway described in the CNWA document.
In FME, using the Clipper transformer, with the digitized polygon as clipper and the NHN as clipee, lakes and rivers were extracted.
Delete any excessive tributaries or features not included in the document.
In FME, CNWA Waterways Start and Stop which showed the extent of lakes and rivers were transformed as points.
For display at a smaller scale, 1:2M Hydrography which matched the CNWA Scheduled Waterways were extracted.
These formed the complete CNWA Scheduled Waterways dataset.
The extracted data is exported as SHP, GDB or KML as required.
TC Smart Maps:
Not all GIS applications can consume KML file directly due to its unique data structures such as networklinks, folders, models etc.
Please contact Lawrence Chong, Digital Services Directorate for TC Smart Maps KML dataset and format translation.
TC Smart Maps KML link: \\tc.gc.ca\tcgis\GISData\Google Mashup\Marine-NWP\CNWA-ScheduledWaters\CNWA-ScheduledWaters.kmz
Customization:
Schema transformation: Not required
Denormalization: Not required
Value coding: Not required
Attribute renaming: As required to improve readability
Attribute removal: It is highly recommended as some fields are unnecessary, this will also reduce file size and improve performance
Geoenrichment: Feature symbolization by theme is recommended
Format translation: Not required
Language translation: As required
Update frequency: As specified.