Advanced Hillshading and Layer Tinting Techniques - PowerPoint PPT Presentation

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Advanced Hillshading and Layer Tinting Techniques

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  1. Advanced Hillshading and Layer Tinting Techniques

  2. Advanced methods to create the hillshade • Swiss method • MDOW method • Combining the methods

  3. 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.

  4. 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.

  5. Default hillshade

  6. Raster calculator grid

  7. Median filter grid

  8. Displaying the Swiss hillshade

  9. Layer tinted DEM

  10. Combined rasters

  11. With bathymetry

  12. Multi-Directional Oblique Weighting

  13. 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.

  14. MDOW hillshade

  15. Combining methods • Order of rasters • Transparency of rasters • Other settings

  16. All of the rasters together

  17. Models to create the hillshades • Swiss Hillshade model • MDOW model

  18. Symbolizing the hillshades • Resampling Method • Transparency Settings • Effects Toolbar

  19. Symbolizing the hillshades • Color ramps • Modify the color ramp colors • Create a custom color ramp • Save the color ramp to a style

  20. Elevation (layer) tints • Creating a custom color ramp • Stretching the color ramp • Setting the No Data values

  21. Demo Style Manager

  22. 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

  23. Color Selector • RGB • CMYK • HSV

  24. Advanced Selection • RGB - red, green, blue • CMYK - cyan, magenta, yellow, black • HSV - hue, saturation, value • Gray - gray shade ramp • Names - ArcInfo color names

  25. 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)

  26. 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

  27. 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

  28. Color ramps • Algorithmic color ramp • Color models Graphic list of color ramps List of color ramp names

  29. 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

  30. 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

  31. CIE Lab – close to human color sensitivity Smooth progression from Color 1 to Color 2

  32. Lab Lch y x Similar to the human optic system

  33. Blue-yellowtinting

  34. Blue-yellowtinting