Oort Archives : Astronomy Group Photographs

For each person listed in the index the following information is given:
Identification number of the photograph
Position in the photograph in pixels, counting from the upper left hand corner
Approximate position in the photograph, as follows: front - middle - back for the position in the direction of viewing or vertical plane of the photograph, and left - left of center - center - right of center - right for the position in the horizontal plane of the photograph.

To define these approximate positions, a grid was superposed on each photograph with elements the size of 1/5 of the horizontal size of the photograph. In the horizontal direction this grid was used to define the location of the persons. In the vertical direction, however, the grid was only used if the depth of people in the photographs was considerable (see e.g. A10, B2). In other cases all persons between the actual front and back rows were described as being in the middle.


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Last modified: Mon Oct 6 17:19:03 2008