Dowload FOLD2DEM

You may need to right click (or control-click) and save or download the link to disk.

To install FOLD2DEM:

 1 Download FOLD2DEM (f2d.dmg). Click one of the blue buttons (above).
 2 Launch (mount) the downloaded disk image file, f2d.dmg.
 3 Drag the f2d folder from the mounted disk image to your hard disk.
 4 Unmount (eject) the disk image.
 5 Archive or dispose of the disk image file.

The f2d folder contains:

 1 example_fold (folder)
 2 f2d_readme_1st.txt
 3 f2d_readme_1st.rtf
 4 FOLD2DEM (application)

System requirements:

Mac OS 9.1 and higher
Mac OS 10.x

Note that FOLD2DEM is not rendering software. Models produced by FOLD2DEM can be rendered using any TMF-capable rendering software. The author uses 3DEM, software by Richard Horne for Windows (95/98/ME and 2000), to render FOLD2DEM-generated models. 3DEM is freely available from Visualization Software LLC.

Comments and inquiries regarding FOLD2DEM should be directed to the author, J. Mies.

E-mail to
Jonathan-Mies@utc.edu

Home Page
www.utc.edu/Faculty/Jonathan-Mies

FOLD2DEM is software for generating a digital elevation model (DEM) of a surface in a simple upright fold. The finished fold DEM is rectangular and is bounded on opposite ends by digitally described cross sections. These end-member sections must be of the same length and must employ the same uniform horizontal distance between elevations in their digital descriptions. FOLD2DEM performs linear interpolations between corresponding values of elevation in end-member sections to fill out the digital description of the folded surface with multiple intermediate profiles. The number of intermediate profiles is based on a spacing equal to that of elevations in digital descriptions of end-member sections. The finished model is written to disc as an ascii terrain matrix file (TMF) and can be rendered using TMF-capable rendering software, such as 3DEM.


Rendered DEM of Lookout and Pigeon mountains and the McLemore Cove anticline (right). Observer is 10 km south of Dougherty Gap (34.56°N, 85.45°W), 1,500 m above the ground (2,000 m above sea level), and is looking north. Landscape based on USGS 30-m DEM data for the Sulphur Springs, Cedar Grove, LaFayette, Valley Head, Dougherty Gap, and Trion 7.5-minute quadrangles. Geology interpreted from Cressler (1981). DEM of folded contact between Mississippian and Pennsylvanian units (red surface) generated with FOLD2DEM software. Both DEMs (terrain and folded surface) rendered using 3DEM software by Richard Horne.


An 11 x 11 fold DEM matrix

The position of a particular value in the DEM matrix demarks the position at which the elevation is modeled to occur on the folded surface. Such a matrix can be envisioned as a series of profiles. Appropriately oriented, columns of the matrix are longitudinal north-south profiles; rows of the matrix are east-west profiles, parallel to end-member sections. The DEM matrix is transposed, north for south, due to the south-to-north ordering of the terrain matrix file.


Note positions of 190 (blue) and 274 (red) in the matrix (above) and in the stick-and-ball model (right). Also note the position of the longitudinal section (yellow) in the model and in the matrix.