This digital orthomosaic covers the entire Grand River Watershed. The watershed extends from the headwaters of the Grand River near Luther Marsh Reservoir to the mouth of the Grand River at Port Maitland on Lake Erie. Aerial photography was flown in the Spring of 2006. The pixel resolution of the orthomosaic is 30cm.
The mosaic is made up of 2 km tiles. The file size of each tile is approximately 3,200 kb.
This geoferenced orthomosaic is in JPEG 2000 format and can be used with GIS or GPS.
In order to access this electronic resource, please visit the Grand River Conservation Authority web site. Also, during reference hours, library reference staff are available to provide further assistance with downloading this data.
There are public workstations in the Geospatial Centre that provide access to ArcGIS, program extensions and data manipulation utilities. Patrons may use the GIS and image processing software in the library to view and manipulate the data. UW faculty, students and staff may copy these data to other media (for example: CD, DVD or Zip disc) for use elsewhere.
ArcGIS may be used to export small sections of the mosaic in a choice of bitmapped formats (also known as raster graphics) including JPG, TIFF, GIF, and BMP or in a choice of vector graphics formats including AI, EPS, and SVG. Yet another option is PDF. The MrSID Geoviewer may also be used to export a small selection of the mosaic as either a TIFF or GeoTIFF image. The user defines the output resolution.
Grand River Watershed Orthomosaic 2006 [computer file]. Cambridge, Ontario: Grand River Conservation Authority, [2006].
Click Image to zoom in.
May 25, 2012
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