Advanced methods to create the hillshade • Swiss method • MDOW method • Combining the methods
Swiss hillshade What this method does is to create two new rasters from the input DEM. The DEM and the two new rasters are used together in the final display.
Explanation of Swiss effect • “Emphasizes the major geographic features, minimizes the minor features, smoothes irregularities on the slopes, but maintains the rugged characteristics of ridge tops and canyon bottoms…You can then simulate an aerial perspective that makes the higher elevations lighter and the lower elevations darker.” • Barnes, D. 2002. “Using ArcGIS to Enhance Topographic Presentation”, Cartographic Perspectives 42: 5-11.
Explanation of MDOW method • "Traditional computer-generated shaded-relief maps emphasize structures that happen to be obliquely illuminated, but wash out structures that are illuminated along the structural grain. This … technique, which emphasizes oblique illumination on all surfaces, provides more detail in areas of an image that would otherwise be illuminated by direct light or left in darkness by a single source illumination.“ This model was developed by Dr. Robert Mark, U.S. Geological Survey, Menlo Park, CA, 94025.
Combining methods • Order of rasters • Transparency of rasters • Other settings
Models to create the hillshades • Swiss Hillshade model • MDOW model
Symbolizing the hillshades • Resampling Method • Transparency Settings • Effects Toolbar
Symbolizing the hillshades • Color ramps • Modify the color ramp colors • Create a custom color ramp • Save the color ramp to a style
Elevation (layer) tints • Creating a custom color ramp • Stretching the color ramp • Setting the No Data values
Demo Style Manager
Contents of a style • Reference Systems • Maplex Labels • Shadows • Area Patches • Line Patches • Labels • North Arrows • Scale Bars • Legend Items • Scale Texts • Color Ramps • Borders • Backgrounds • Colors • Vectorization Settings • Fill Symbols • Line Symbols • Marker Symbols • Text Symbols • Hatches
Color Selector • RGB • CMYK • HSV
Advanced Selection • RGB - red, green, blue • CMYK - cyan, magenta, yellow, black • HSV - hue, saturation, value • Gray - gray shade ramp • Names - ArcInfo color names
For electrostatic and ink-jet plotters that deposit pigment on paper For computer screens and television monitors White (255,255,255) Cyan Magenta Yellow BLUE - z y - GREEN RED - x Black (0,0,0) RGB RGB CMYK Black(255,255,255) White (255,255,255) Red Cyan Green Magenta Blue Yellow BLUE - z y - GREEN RED - x White(0,0,0) Black (0,0,0)
When you want to change one component of color HSV VALUE Green 120° Yellow Red 0° Cyan 180° 100% White Blue 240° Magenta HUE 0% 100% Black SATURATION
Tips for working with color • Custom colors are displayed on the color palette • Right click a color to see its name • Use a null color to turn off outline drawing or create transparent areas in your symbols • The Eyedropper Tool lets you identify the RGB values of colors on your map
Color ramps • Algorithmic color ramp • Color models Graphic list of color ramps List of color ramp names
Algorithms for color ramps • HSV • CIE Lab • Lab LCh • Knowledge Base articles • 17221 – How are the algorithms for color ramps in ArcMap different? • 22539 – How to create or edit an algorithmic color ramp
Linear traverse of color space between two colors HSV VALUE Green 120° Yellow Red 0° Cyan 180° 100% White Blue 240° Magenta HUE 0% 100% Black SATURATION
CIE Lab – close to human color sensitivity Smooth progression from Color 1 to Color 2
Lab Lch y x Similar to the human optic system