![]() This technique can be applied to any area in Google Earth where a mismatch exists between real and virtual topography. ![]() The SketchUp model was then imported into Google Earth to show the outcrop and interstate as it looks today, with the interstate passing uninterrupted through a ridge rather than draping over hilly topography. Here, we will try to adjust the contour interval of our 3-D model terrain from 20 meter (Google map contour reference) to 5 meter contour interval. To correct for this, terrain modifications were made with Sketch-Up by copying and virtually excavating the landscape. How to Create a 5 Meter Contour Map Using SketchUp. Google Earth satellite and Street View images show the outcrop, but the digital terrain in Google Earth does not reflect the approximate 150,000 m 3 of rock removed to form this roadcut. Near mile marker 44 along I-26, an ~250 m-long and 65 m-high outcrop was formed as part of the early 1990s construction. The series of outcrops created along the corridor provide an exceptional traverse through Grenvillian-age basement and cover strata which contain numerous stacked Alleghanian thrust sheets and shear zones. ![]() When you geolocate your model, you ensure your model appears in the correct location in Google Earth. ![]() 23 (future I-26) was widened to four lanes from Sams Gap at the North Carolina–Tennessee line to the Nolichucky River near Erwin, Tennessee, in the early 1990s. Select Window > Model Info, select the Geo-location option in the sidebar on the left, click Set Manual Location, and enter a latitude and longitude in the dialog box that appears. Such is the case along sections of the I-26 corridor in Unicoi County, northeastern Tennessee. Users of Google Earth for field research often encounter disparities between the digital topography and the current-day Earth's surface, as newly formed outcrops may not be represented in the topography. The creation of new outcrops through construction is an important source of field data for geologists, especially in parts of the Appalachians with limited rock exposure. In SketchUp, choose Tools Google Earth Get Current View to import the section of terrain (and satellite imagery) that you framed in Google Earth in Step. ![]()
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