This method is not new. Many trained archeologists and conservators were able to obtain rectify photography. Standard equipment and B&W material were used to create analogue image. After optical rectification and scaling into B&W lab was possible to get the complete view of the object assembled from a number of individual photos. Manually traced line drawing from this image was used like a base-map.

Today this technology has been changed. Computer-aided methods like digitizing the image, digital development, and digital rectification and scaling of the image make the process very fast and more accurate. The computer technology gives some serious advantages:

- Simultaneous and interactive use of different kinds of base-map images - color, B&W, line drawing.

The photos could be taken on color film - negative or slide or straight with digital camera. The digital color image, once created, could be modified to B&W raster image (matter of seconds) and traced to vector line drawing (meter of few hours). The tree images could be placed on tree different layers and interactively used with the other condition-recording layers .

- Faster work on the field.