How to use information extracted from former aerial pictures?

Description

A methodology is presented in order to extract information of panchromatic aerial pictures for land cover cartography. Without meta-information about their geometry, the scanned pictures are rectified and empirically geo-referenced using geometric transformations and control points. A mosaïc of pictures dating of year 1937 was obtained with this methodology for the commune of Versoix (GE), with a geometric precision ranging between 2 to 5 m. A simplified map of the land cover has been carried out with an object approach (segmentation followed by classification), using criteria of intensity, shape and texture.