Holland Marsh

Date Flown / Processed 2014/2015
Area Covered 28.16 km2 | 6,958 acres
Number of images 4322
Average Resolution(per pixel) 4.11 cm | 1.61 in
Georeferencing mean error <= 2 cm

The scope of this project included the collection and processing of topographical data for the Holland Marsh river and man-made drainage canal system for surveying/engineering purposes.

  • 4 cm/pixel resolution orthomosaic
  • High and low density point clouds ± 2 cm accuracy
  • Contours / Profiles
  • Online Viewer Access

The river portion of the project is 17 km long and about 10m to over 50m in width. The canal is 28.50 km long and ranges from 20m to 35m in width. The data collected covered the width of the river and canal plus a buffer of 100 metres on both sides. A large number of control points were collected to yield survey quality accuracy required for the engineering work.


The Holland Marsh is an agricultural area in Ontario about 50 km north of Toronto and stretches from the Oak Ridges Moraine to Cook's Bay at Lake Simcoe. It covers an area of about 21,000 acres in its entirety and is considered part of the most valuable agricultural land in Ontario that generates over $50 million worth of produce per year.

The fertile muck soil found in the farms of the Holland Marsh was originally under swampland that was drained to expose the fertile grounds for farming. Today, the canals and dykes that were constructed as part of the Holland Marsh Drainage Scheme over a hundred years ago requires constant management, monitoring and maintenance to protect the land from flooding, erosion and environmental issues.

Description The Cathedral of the Transfiguration
Date 06 August 2015
Source Vikpahwa.com
Photographer Vik Pahwa
License Licensed to Bosys Technologies Inc.

Description The Cathedral of the Transfiguration in Markham, Ontario, Canada.
Date 12 August 2009
Source flickr
Author Sorin Nechita
License Creative Commons

Description home-icon
Date 23 April 2013
Source iconfinder.com
Author Timothy Miller
License Creative Commons

Description Mine wagon icon
Date Unknown
Source game-icons-net
Author delapouite.com
License Creative Commons

Description A colored Emoji from Noto project, released under Apache license
Date 19 August 2014
Source commons.wikimedia.org
Author Google
License Apache License 2.0

Description Satellite icon for Featured Pictures
Date 5 August 2014
Source commons.wikimedia.org
Author Maxx12
License Creative Commons

Description GIS
Date Unknown
Source The Noun Project
Author Iconathon
License Public Domain Dedication

Description Contact-Us
Date 30 March 2013
Source flickr
Author Paladin Zhang
License Creative Commons

Description A detailed Robinson projection SVG map
Date 12 November 2006
Source Wikimedia Commons
Author Canuckguy (talk) and many others
License Public Domain