A method of deriving geometrical data of a structure from an image of the structure comprises the selection of marker points in the image. A testing tool has a plurality of packers spaced apart along the axis of the tool, and at least a testing port. An analysis platform reads in a network policy. The rules may specify allowed uses of the content, including whether or not the content can be copied or transferred, and whether and under what circumstances received content may be \u201cchecked out\u201d of one device and used in a second device.