Scaling the Plot. The options on the Scaling Page allow you to set the scale of the plot file that is super imposed on your sketch-map. This will force the plot to exactly match the scale of your image. Any differences between the sketch and the plot will indicate errors in the sketch, which can be removed by the morphing process.
Scale Types. There are two types of scale in a sketch-map image. The first is the Paper-Scale. The paper-scale is the resolution the image that was produced when the image was scanned. This will be a certain number of pixel per inch or cm on the paper.
The second scale is the Cave-Scale, which is scale that was used to draw the image. Most cave cartographers will choose a scale for the sketch-maps they are drawing. The scale usually depends on the size of the passage and other aspects of the cave. For example, a type cave-scale might be 20 feet per inch. In other words, an inch on paper would represent 20-feet in the cave..
The two scales are independent of each other. A sketch could be drawn at any scale the cartographer chooses and the the scan can be done at any resolution available on the scanner. The editor allows you to adjust the scanned pixels per inch, but you cannot change underlying cave-scale without redrawing or resurveying the map.