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This is an online mapping application containing parcels, air photos, recreation information, wards, etc.

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Download topographic vector data for all of the United States.

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Download of satellite, aircraft, and other remotely sensed raster data. Free account setup is required. Most data is freely available for download and in the public domain. Select datasets have use restrictions and/or fees associated with them,… Read more.

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Concordance tables between Standard Industrial Classification, North American Industry Classification System, National Occupational Classification, International Standard Classification of Occupations, and Standard Occupational… Read more.

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From their main web page: "A partnership designed to facilitate access to information for health planning with the overall goal of producing action to reduce health inequalities." No longer updated, but many maps archived.

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Online mapping data for the city of Ottawa

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Geocode any North American location for free.