University Map Library

Orthoimagery of London, Ontario

Description
The City of London 2002, 2005 and 2006 Orthophotos are seamless files of aerial photographs digitally georeferenced. The 2002 and 2005 orthophotos have a 17 centimetre pixel resolution while the 2006 have a 15 centimetre pixel resolution. All orthos are based on imagery taken in spring 2002, 2005 and 2006.

The black and white seamless files are projected using 6 degree UTM NAD83 and are based on a scale of 1:10,000 (for 2002, 2005) and 1:15,500 (for 2006).

Any printouts must contain the following statement:

"Provided by Brock University Map Library, current year. Copyright: The Corporation of the City of London, year of data."

Data Format
The orthophotos files are available in MrSID format. The file size is approximately 268 Mb for 2002, 268 Mb for 2005 and 335 Mb for 2006.

Use Restrictions/Copyright
The data is licenced to Brock University faculty, staff and students for teaching and research purposes only. A license agreement must be signed before the files will be delivered. The data is under copyright by The Corporation of the City of London.

Accessing the Data:
The data is georeferenced and can be accessed using GIS (geographic information systems) software including ArcGIS as well as LizardTech MrSID Geoviewer. The 2002 data files are stored on CD at MapPC G 3464 L65 A4 2002 L65. The 2005 and 206 data files are accessed via FTP through Scholar's Portal. Please ask Map Library staff for assistance.

Citation Format:
City of London, Ontario Orthophotos [computer file]. (2002). London, ON: City of London. Available: Brock University Map Library Controlled Access S:\Maplibrary\DATA\Aerial Photography\London_2002\London60_2002.sid

City of London, Ontario Orthophotos [computer file]. (2005). London, ON: City of London. Available: Brock University Map Library Controlled Access Ontario Scholars' Portal access ftp://maplib/FTPOCUL/London-may2005/Ortho/London60_2005.sid (Accessed current date).

City of London, Ontario Orthophotos [computer file]. (2006). London, ON: City of London. Available: Brock University Map Library Controlled Access Ontario Scholars' Portal access ftp://maplib/FTPOCUL/London2006/Ortho_2006.zip (Accessed current date).

Sample view of 2002 imagery: University of Western


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