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Full Name
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CLOCA Drainage
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Abstract
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The Drainage layer represents all drainage related features such as river and stream centrelines, ditches, lake and pond shorelines, and streambanks. It also includes locations of any culverts that surface water passes through.
The first iteration of this dataset was obtained from First Base Solution in 2000. CLOCA continued receiving consecutive updates in 2002, 2005, 2008 and 2010. In 2011, the attributes in the layer were updated to meet the WRIP Hydrographic Specifications. The 2010 drainage and 2008 headwater portion of the dataset were merged to obtain current Drainage dataset. During this time, edits were made based on visual evidence found within the current orthophotograph of the time.
With the acquisition of the Peterborough Lidar from OMAFRA in 2017 and CLOCA's South Central Durham Lidar in 2018, updates have been made using a hillshade product delineated from a Lidar-derived DEM, along with the 2018 iteration of First Base Solutions' Hydrographic Features and the latest orthophotographs. Digitized edits are made at a minimum scale of 1:1000.
CLOCA Drainage Dataset was divided into 3 sub-types in the field named ‘EdgeType’, with flow and shoreline being the main classes:
- Flow
- Shoreline
- Other
Other hydrographic-related features are captured and included under the ‘Other’ class. The feature types included in these feature classes are not water features themselves, but may pose impediments or hazards to water flow or navigation. These features usually occur on top of waterbody or watercourse features, which continue underneath or around them.
Since the 2011 drainage update, additional updates were performed to include:
- The drainage segments falling within Natural Heritage System were coded as NHS – 2013
- The Stream Order updates (2016) - the updates were performed for the RIPARIAN analysis
- The drainage updates along HWY 407 for BS and BHF (FBS 2018 delivery, matched to 2018 ORTHO) (Sept 2018)
- Stream centrelines/existing streambanks updated; new streambanks digitized within urban area where banks are at least 5m wide - based on hillshade derived from 2017/2018 Lidar and 2019 ORTHO (Jan 2021)
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Feature Type
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Line
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Location
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CLOCA_INFO
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Feature Dataset
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CLOCA_INFO.SURFWATER.Drainage
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Geographic Extent
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CLOCA Watershed
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Maintenance Status
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As Needed
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Horizontal Datum
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North American Datum 1983
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Vertical Datum
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Spatial Projection
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NAD83/UTM Zone 17N
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Access Constraint
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CLOCA Open Data Licence v1
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Use Constraint
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None - in accordance with licence agreement
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Citation
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Produced using information under License with the Central Lake Ontario Conservation Authority, © Central Lake Ontario Conservation Authority, 20** (**Insert year of publication of IP)
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Agency Originator
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Central Lake Ontario Conservation Authority
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Agency Distributor
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Central Lake Ontario Conservation Authority
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Online Linkage
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https://open-data.cloca.com/datasets/ee76f30bccb745808b267068e1cfd474_1
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Methodology
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Supplimental Info
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Related Documents
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Related Records
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