Creating a 3-D Feature
____ 15. If you happen to have dismissed ArcMap, start it again with North_Islands_map4. Turn on the image layer MSH. Zoom in on the sixth island. You should see the image of the volcano. (If not, you will have to Georeference the image again.)
In ArcMap add the Feature Class named Trail_horizontal from
Make it a red line of width 3.
Trail_horizontal is a trail from the water’s edge to the rim of the volcano, but with all segments in the horizontal, sea level plane. What we will do is make a three-dimensional trail, named Trail, with the Editor, using the pattern of Trail_horizontal.
In ArcMap add the empty Feature Class named Trail (that you made earlier in this exercise), from
____ 18. Zoom to Trail_horizontal. Start Editing Trail–making sure that the target is Trail. Starting at the ocean make a polyline with five segments that overlay the segments of Trail_horizontal. End each segment, including the last, with a single click.
Find Sketch Properties on the Editor toolbar. Click it. You will see the three dimensional coordinates of the six vertices you have made. All the z-coordinates are presently zero. Starting with the vertex on the ocean, click each z-coordinate to change the values to:
0, 400, 900, 1500, 3000, 4000
____ 20. Click Finish Sketch (or press F2). Dismiss the Edit Sketch ...