Terrain Representation Workshop

Introduction

Focus of the workshop

• Concepts and techniques involved in creating mono- and multicolor cartographic displays of the terrain as seen in plan view

Content of the workshop

• Sources of DEM data used to create terrain representations

• Transforming raw data onto a map projection surface through raster resampling

• Principles behind analytical hillshading • Hypsometric tinting schemes• How to combine tinting with hillshading• Advanced hillshading and layer tinting

techniques • Creating an appropriate legend for your map• Outputting and printing the maps

Resources

• Materials to teach about terrain representation– A one-day workshop on or teach yourself

• Lectures• Exercises• Data• Styles

• Available on mappingcenter.esri.com

Agenda

• DEM Data Sources • Datum Transformations • Raster Resampling • Hillshading and Layer Tinting • Advanced Hillshading Techniques • Modifications to Layer Tints • Terrain Representation Legends • Bump Mapping • Printing and Outputting • Conclusion

Final Project

• We would like you to create a final project map that combines what you learned in the workshop with a topic of special interest to you– Use data that you now know you can download– Use Swiss hillshading – combine it with MDOW if

appropriate– Add an appropriate layer tint– Create a legend for your map– Add a title, your name and text describing the data

sources

Detailed agenda - 1• LECTURE: Introduction (TerrainRep_2008_Introduction.ppt)

– Introduction to the workshop• DEMO: SPATIAL ANALYST• EXERCISE: Enabling the Spatial Analyst Extension

(TerrainRep_2008_SpatialAnalyst.doc)

• LECTURE: DEM Data Sources (TerrainRep_2008_DEMDataSources.ppt)– Data– Sources for DEMs– Structure of DEMs– Linear units vs. angular units– Raster data other than elevation– Discrete raster data (land cover)

• EXERCISE: Working with Etopo2 Data (TerrainRep_2008_Etopo2Data.doc)

Detailed agenda - 2• LECTURE: Datum Transformations

(TerrainRep_2008_DatumTransformations.ppt)– NAD 83 Adjustment of NAD 27– Latitude, Longitude on Topographic Maps– Latitude, Longitude Shifts in Arc Seconds– UTM or State Plane NAD27 to NAD83 Grid Conversion

• LECTURE: Raster Resampling (TerrainRep_2008_RasterResampling.ppt)– DEM manipulation– Datum Transformation– Raster Resampling with Nearest Neighbor– Map Projection– Display with Bilinear Interpolation

• EXERCISE: Projecting the Etopo2 Data (TerrainRep_2008_ProjectEtopo2Data.doc)

Detailed agenda - 3• LECTURE: Hillshading and Layer Tinting

(TerrainRep_2008_HillshadingAndLayerTinting.ppt)– Hillshading– Mathematical method– Azimuth (image inversion), altitude (with examples), shadows– Contrast stretching (standard deviation stretch)– Layer tinting

• EXERCISE: Creating a Hillshade (TerrainRep_2008_CreateAHillshade.doc)• EXERCISE: Contrast Stretching a Hillshade (TerrainRep_2008_

ContrastStretchAHillshade.doc)• EXERCISE: Setting the Display Resampling Method (TerrainRep_2008_

DisplayResampling.doc)• EXERCISE: Layer Tinting the Hillshade Using Classified Values

(TerrainRep_2008_LayerTintTheHillshade.doc)• EXERCISE: Displaying the Layer Tint Over the Hillshade (TerrainRep_2008_

DisplayTheLayerAndHillshade.doc)

Detailed agenda – 4• LECTURE: Advanced Hillshading Techniques

(TerrainRep_2008_.ppt)– Swiss Hillshade– MDOW Hillshade– Blue-yellow Hillshade

• EXERCISE: Creating a Swiss Hillshade (TerrainRep_2008_CreateSwissHillshade.doc)

• EXERCISE: Displaying a Swiss Hillshade (TerrainRep_2008_DisplaySwissHillshade.doc)

• EXERCISE: Modifying the color ramps (TerrainRep_2008_ModifyColorRamps.doc)

• EXERCISE: Creating an MDOW Hillshade (TerrainRep_2008_MDOWHillshade.doc)

• EXERCISE: Combining the Swiss & MDOW Hillshades (TerrainRep_2008_CombineTheHillshades.doc)

• EXERCISE: Symbolizing the Crater Lake Bathymetry (TerrainRep_2008_ SymbolizeTheBathymetry.doc)

• EXERCISE: Creating a Blue-Yellow Hillshade (TerrainRep_2008_CreateABlue-YellowHillshade.doc)

Detailed agenda - 5• LECTURE: Terrain Representation Legends

(TerrainRep_2008_TerrainRepresentationLegends.ppt)• EXERCISE: Create a Terrain Representation Legend

(TerrainRep_2008_TerrainRepresentationLegend.doc)

• LECTURE: Bump Mapping (TerrainRep_2008_BumpMapping.ppt)– Bump Mapping– What it is & why to use it– How you do it

• EXERCISE: Create a Bump Map (TerrainRep_2008_BumpMap.doc)

• LECTURE: Printing and Outputting (TerrainRep_2008_PrintingAndOutputting.ppt)

– Printing and Output– JPG or TIF with a world file– Flattening the rasters

• EXERCISE: Flatten the Rasters (TerrainRep_2008_FlattenTheRasters.doc)• EXERCISE: Finish Your Map (TerrainRep_2008_FinishYourMap.doc)