These digital orthophotos provide a full-colour view of the Greater Toronto Area, as well as the Golden Horseshoe. These images were provided by Triathlon Mapping Corporation. The georeferenced orthoimages have the same accuracy as a 1:20,000 scale map. The resolution of these photos is 1 meter. For coverage areas and thumbnails, please see the index and links below, for the location of MrSID files. To find the individual TIFF images, please consult the TIFF index.

Index showing coverage for MrSID images

Index shows coverage coveage areas for MrSID files

Links to imagery thumbnails

[Note from Rose (July): the parent menu item for the mosaic files below has not been changed to City of Toronto until we decide whether we are keeping these.]


Spatial reference and data type

These data sets are available in Universal Transverse Mercator (UTM) co-ordinates; horizontal datum is North American Datum (NAD) 27. These data are stored as MrSid image files, and are also available as geo referenced TIFF images. Other data formats can be accommodated, as the Geospatial Centre has access to a number of conversion utilities.

Data access

In order to access these data sets, please visit the Geospatial Centre information desk during reference hours. Reference staff are available to provide further information about these data sets and to deliver data upon request. Under the terms of the Library's license agreement, these data sets are for use by students, faculty, and staff at the University of Waterloo only.

Data manipulation

There are public workstations in the Geospatial Centre that provide access to Geographic Information System (GIS) software, program extensions and data manipulation utilities. Patrons may use the GIS software in the library to view and manipulate the data. UWaterloo faculty, students and staff may copy these data for use elsewhere.

Data output

These data may be exported from the GIS software as a bitmapped image (e.g., jpg) or may be printed as a map view using one of the library's colour printers.

Use restrictions/licensing/copyright

This material is provided for academic, research, teaching, and personal use only. A data release agreement must be agreed to before the data is delivered. Triathlon Mapping Corporation should be acknowledged on any derivative product, such as a map or an image.


Colour digital orthophotos of the Greater Toronto and Golden Horseshoe Areas 1995 [computer file]. Burnaby, British Columbia: Triathlon Mapping Corporation, [1996].

Sample view of the data

Georgetown, ontario 1995 imagery