Size of Scree Stones

These settings adjust the size of scree stones.

Map Scale

The scale of the map should be entered before adjusting all other values. The map scale is used be Scree Painter to convert from dimension in millimeters to meters used by the georeferenced data. Representative fractions between 1:5,000 and 1:500,000 can be entered.

Stone Diameters

Shadow: Select the size of the largest stones, which are placed where the shaded relief image is black.
Sun: Select the size of the smallest stones, which are placed where the shaded relief image is white. The Sun slider is relative to the size selected by the Shadow slider, i.e. if you change the shadow size, the sun size will scale proportionally. The label to the right of the slider indicates the diameter of the smallest stone that wil be place on the brightest area of the shaded relief.

Stone Diameters on Large Stones Mask

Scree Painter can optionally use a mask for placing enlarged stones. Where the mask is white, the size of stones does not change. Where the mask is black, stones are enlarged by the factor selected here. The enlargement factor is relative to the size selected by the Shadow slider. The label to the right of the slider indicates the diameter range of large stones. In the screenshot shown, the diameter varies between 0.19 mm for enlarged stones on sunlit slopes and 0.29 mm on dark shaded slopes.

Stone Diameters on Gully Lines

Scree stones placed along gully lines are enlarged by the factors selected here. The goal is to enhance the visibility of gully lines. The first slider sets the scale factor for the highest point, the second slider sets the scale factor for the lowest point in the gully line. Scale factors for points in-between are linearly interpolated. Both values are relative to the size selected by the Shadow slider. The labels to the right of the slider indicate the diameter of the highest and lowest points on a gully line, depending on whether they are placed on a sunlit or a shaded slope.

Note: the highest point should be slightly smaller than the lowest point to simulated the effect of gravity on scree stones. Larger and thus heavier stones run over a longer distance and are deposited at the foot of a slope.