Getting Started
with WCS 6 Part 4A.
Draping Images on Terrain
1. Open the YNP project
we created in the last tutorial from the recent projects list.
Return the Main camera to its default location, open the
Plan Camera in the right view, and save the project as
YNPCM.
2. Open the Database Editor and you'll see the YNP-100m DEM enabled,
the one we created for higher elevation viewpoints. We're looking
at terrain near the western border of Yellowstone National Park,
just east of the town of West Yellowstone, Montana. We're going
to import a false color satellite image of the Yellowstone area
as a Color Map, drape it over the terrain, and fly across it.
3. Go to the Land Cover Task
Mode and double click the Color Map category to create
a new Component and open its Editor.
4. Rename the Color Map Landsat
and Color by Pixel to render all of the image detail on
the terrain. We'll use the Image Object dropdown box to add our
satellite photo, but let's first copy the image to a convenient
location on our hard drive.
5. Go to the Windows Explorer,
or Finder if you're on a Mac, and make your way to the
image folder on the Tutorial 2
CD.
6. Copy the YNPLandsat.iff
image to the YNP project folder on your hard drive. WCS
will remember where this file was loaded when we add it to the
project. If we load it from the CD, WCS will try to find it there
every time the project is opened. Copying it to the project folder
before import ensures that it stays with the project and makes
it easy for WCS to find it.
7. Back in WCS, expand the Image
Object dropdown box and add a New Image Object.
8. Navigate to the YNP
project folder and choose YNPLandsat.iff.
9. After the image is imported,
its thumbnail will appear in the thumbnail window.
10. Double-click it to view a
downsampled version of the image. This includes most of Yellowstone,
but we'll only be rendering a small part of it.
11. We're going to take advantage
of the new WCS6 georeferencing feature, so Edit Image
Object to open the Image Object Library.
12. While we're thinking of it,
enable Load Fast and Apply to All. We have a couple
of options when it comes to placing the Color Map on our
terrain. To make those options available, Add Geo Reference
to add its attribute page to the Landsat image.
13. With Set Bounds in a View,
we can click opposite corners on the terrain where we want to
place the Color Map. Snap to selected DEMs is great for
USGS Digital Orthophoto Quadrangles, or DOQs, and USGS topographic
map overlays.
14. We have the latitude and
longitude extents of the Landsat image, so we'll enter the boundaries
manually. Enter 45.0267° in the Top field,
tab and enter 111.0967° in the Left field,
enter 110.18° in the Right, and 44.1333°
in the Bottom field.
15. Realtime views will refresh
as the Color Map bounds are entered. Zoom back in the
Plan view to see the Color Map bounds.
16. Return to the default position
when you're done. We're finished with the Image Object Library so close it and save the project.
17. Let's add the Landsat
Color Map as a realtime view overlay. Open the Plan View Preferences to the Overlay/Gradient page
and check Ecosystem Map.
18. The Status window
will show Generate TexMaps as the overlay is generated.
19. When it's finished, the Plan
view will refresh with the overlay.
20. Repeat the process for the
Main view. There will be little delay since the overlay
is already in memory. Detail is function of terrain resolution.
Higher resolution terrain will show more detail in the overlay.
21. The Color Map is reducing
the contrast of our realtime views, so let's hide it. Open the
popup menu and select Realtime Options > Land Cover
> Color Maps.
22. Do the same for Main
view.
23. Render a preview. All that's
left is to create a camera path to fly us across our false color
terrain.
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