Example of drawing taken on 29 August 1999 showing high degree of detail. The scanned image excludes portion of the drawing with information about date and time of observations. The red line shows the horizontal direction in image orientation. Comparing the location of end points, it is clear that there is a slight misalignment between the horizontal direction and east-west orientation. Portion of the image enclosed by box is an inset, which shows portion of solar image not in its correct location on solar disk. The red oval indicates an example of an error in the heliographic coordinates of an active region. In this particular case, the later correction of latitude of this region is in error; compare the number with the approximate latitudes indicated on the solar limbs.