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Commercial Photogrammetry and remote sensing firms operate aircraft in countries with open access to airspace such as Canada, the United States, Australia, South Africa, and many of the countries of Europe and South America. In fact, most of the imagery collected over those areas is acquired by private commercial firms who primarily collect mono and stereo, oblique and nadir, and passive and active very-high and high-spatial-resolution imagery from airplanes, helicopters, vehicles, and UASs. The firms primarily acquire imagery on an as-needed basis with the specifications of the collect determined by the image purchasers who are either private firms, public agencies, or NGOs. However, some companies collect imagery speculatively and then license access to the imagery to their customers. Links to information about and websites for many commercial photogrammetry and remote sensing firms can be found on the following websites:

 Management Association of Private Photogrammetric Surveyors (http://www.mapps.org/search/custom.asp?id=196)

 American Society of Photogrammetry Remote Sensing (ASPRS) (http://www.asprs.org/)

 International Society for Photogrammetry and Remote Sensing (http://www.isprs.org/)