GIS Survey Class
Assignment 6: Building a 3D and Shaded Relief image of Canyon Lake Creek Watershed and Saving your work

Objective: Learning to build 3d and Shaded relief images from a DEM (digital elevation model) using GRID files and additional Extensions in ArcView.

Preliminary work

1.  Read the following definitions on Digital Elevation Models (Definition 1 , Definition 2   click on these links) they are a little technical, but the basic principles are the thing to concentrate on.

2.  Create a c:\temp folder to save your work to and save your project as well as all other files here.

3. When done with your project, try to copy all of your work onto a Zip, thumb drive, or your campus account u:drive. 

Shaded Relief work

1. Consult your notes and use the proclib on the web page to learn how to perform your shaded relief work.

2.  After starting ArcView add one of the following dem (Digital Elevation Model) files to a new VIEW using Add Theme and the grid format.

Canyon Lake Creek

J:\GEO\GEO_data\WWU\CanyonLake\DEM

It is a grid file called clcdem

Fraser Lowlands

J:\GEO\GEO_data\WWU\brdrdata\

It is a grid file called crossbdr

North America

J:\GEO\GEO_data\WORLD\ESRI_N_Am_Elev\northamerica\

It is a grid file called elevation

To make your life easier, I would usually recommend copying the above file to the workspace you created on your c:\temp folder, however there are circumstances where some computers balk when the data is transferred and it is better to run the data directly from the j drive or saldata.  You may need to try each.  If you still have problems see the instructor or a TA.

3.  Next, Compute_hillshade and create a shaded relief map of your selected area (See Steve Walker's Proclib (notes) on the course web page).

4.  Using the advanced button in the Legend Editor, drape the basic DEM you have chosen over the shaded relief (hillshade) data (that is go from the basic black and white shaded relief model to one in color contours).  This is the same thing that we did in class for the USGS map, but this time you can simply use the original DEM instead of a USGS map.

5.  Open a new VIEW  (view 2).  Again, using Add Theme and the grid format put the same DEM into the second view..

6.  Make a final LAYOUT of the shaded relief map from View 1, then using the View Frame icon add a second map of the same area to the Layout without shaded relief from View 2. (Your final Layout will have two "maps" in it one in shaded relief and without).

7.  Finally repeat our work from class on Mount Baker with the USGS map draped over the shaded relief map of the Mt. Baker area, and zoom in to some feature that you feel is well represented with this map.  Make a final Layout of this map.

3D Analyst Work

Rerun Tutorial 1 as we did in class, check 3D Analyst Notes/Instructions for the location of the turorials.

 

Write-up

1.In your own words provide definitions.

2.  Shaded Relief Layout Map of your selected area: Canyon Lake Creek, Fraser Lowlands, or North America.

3.  Shaded Relief Layout Map of the section of Mount Baker that you zoomed in on to show details from the USGS map.

4.  Critique your result. How might you want to improve things or add more?

 

Due at class time. Note office hours for when help is available on this project.