Contractors > New Media Mapping Services & Digital Terrain Models > Solid Terrain Models

Solid Terrain Models

   

Ideal for visitor center exhibits, solid terrain models are actual physical models that people can gather around, view from any direction, and explore. The models are usually at least several square feet in size and are suitable for display on tabletops or walls. Watch a video about Solid Terrain Models »

Model Making Steps

 

1. Data

Kenai Fjords National Park Unigrid map made from GIS and satellite sources.

 

Solid terrain models derive from the same GIS data found at most parks and used by Harpers Ferry Center to produce brochure maps. The chances are good that the necessary data is readily available to produce a model of your park. Computer Numerically Controlled (CNC) routers reading Digital Elevation Models (DEMs) carve the terrain to accurate specifications. The information that prints on the terrain surface is entirely customizable – labels, roads, boundaries, satellite images, etc. – the choice is yours.

Kenai Fjords Unigrid map


2. Design

3D virtual model for viewing in a Web browser (right) or in a Quicktime movie (below).

Kenai Fjords virtual model in Quicktime

View Quicktime Animation »

 

To help you visualize how the final model will look, you will receive virtual images of the proposed model seen from multiple viewing angles. The images are viewable in a web browser, or you can watch a QuickTime movie and circle around the model. The terrain, textures and colors, and labels on the virtual model will appear nearly identical to those printed on the actual solid terrain model.

Kenai Fjords three-dimensional virtual model


3. Review

1-foot by 1-foot sample of the proposed model.

 

In addition to reviewing virtual models, you will receive a 1’ x 1’ sample of the solid terrain model for review—and touching. You decide which portion of the landscape to receive as a sample. Confirming the amount of vertical exaggeration applied to the terrain is a critical decision at this stage.

Kenai Fjords solid terrain review model


4. Fabrication

Labels and landcover textures printing on the carved terrain model.

 

Solid Terrain Modeling, Inc. fabricates the model at their facility in Fillmore, California, and then crates and ships it to your site. This image shows an inkjet printer applying map labels and textures (right side) to the routed terrain surface (left side). They also apply a clear protective coating to the model surface.

Kenai Fjords carved terrain model


5. Installation

Right: Model mounted on a custom table in the Exit Glacier Contact Station, Kenai Fjords National Park.

Below: Standard table available for solid terrain models.

Standard table for solid terrain models

View larger »

 

To display your solid terrain model, you can order a custom-sized table and have it shipped to your site. The wooden tables come in a variety of natural finishes and comply with ADA accessibility guidelines.

Kenai Fjords model installed in visitor center


   

More about solid terrain models

  • You can get multiple copies of a model. Each additional model costs one half the price of the original.
  • Solid terrain models are made from blocks of high-density foam at sizes up to 4’ x 8’. By piecing multiple blocks together, very large models can be made (the seams are largely unnoticeable). Models can also be made at smaller sizes and with irregular shapes.
  • The clear coating applied to the model surface is not enough to protect the model from continuous touching by visitors over long periods of time. The models are not suitable for outdoor exhibits.
  • The terrain on most models requires at least some vertical exaggeration to look natural, which varies depending on the character of the land. High mountains require little or no vertical exaggeration, while very gentle terrain can require 200-percent vertical exaggeration, or even higher.
  • Labels and lines (trails, roads, boundaries, etc.) positioned on very steep slopes tend to stretch and blur. It is advisable to place them elsewhere or leave them off the map entirely.
Author: Harpers Ferry Center
Last Updated: Monday, 20-Jul-2009 07:51:06 Eastern Daylight Time
http://www.nps.gov/hfc/acquisition/map-contracts-1.htm