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ERSC 4p31

Watershed study & assessment (ERSC 4p31): cartographic resources

ERSC 4p31: Watershed Study & Assessment

MAPS & GEODATA WEBSITE https://brocku.ca/library/mdgl/

Niagara Air Photos https://arcg.is/OHiz4

  • All flight line indexes
  • Historical imagery 1921 – 1972 can be viewed from the website
  • Orthoimagery 1995 - 2018 can be viewed from the website
  • This is an essential source for Niagara imagery
  • Provides an excellent resource for detecting landscape changes over a time period
  • Traditional air photo retrieval instructions are posted on the index cabinet
  • (Air photo interpretation for identifying certain features will be essential)

Paper Maps

  • Topographic Maps of Niagara date from 1904 to 2000’s (1:50k; 1:25k)
  • Niagara Historical Map Gallery is rich in 18 and 19c maps, older city plans of Niagara

NPCA Watershed Explorer https://bit.ly/2tJUNSc

  • Thematic layers related to watershed management: ELC Community Natural Areas [NAI]: a classification of natural areas, i.e marsh; forest, etc.; Water quality Network, and Groundwater Network (Watershed Monitoring)
  • 2020 imagery, Watershed Planning Areas, Sub-watersheds (Boundaries)
  • Contour interval is 1 metre

NPCA Watershed Health  https://npca.ca/watershed-health  

NPCA Open GIS Data Portal https://gis-npca-camaps.opendata.arcgis.com/

Ontario Flow Assessment Tool (OFAT)  https://bit.ly/3tAkPah

  • OFAT creates watersheds, calculates watershed characteristics, executes hydrology models and reports water flow statistics.
    ***Good tool for mapping data sampling sites; adding annotation; creating boundaries.

Google Maps  https://maps.google.ca/

  • Useful for navigating and viewing areas using ‘Street View’
  • ‘Earth’ view (bottom left corner) can also be useful for viewing some of the most recent imagery

Mapping GPS Data (tutorial)

  • Instructions for using GPS to capture data sampling sites and mapping them in a GIS, or other mapping tool.
  • ArcGIS Online also accepts a CSV data file for mapping x, y data.

HOW TO Reference Maps & air photos (pdf)