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CADD Engineering Standards - Ohio Department of Transportation

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303.2.1 Types <strong>of</strong> Models<br />

January 18, 2013<br />

MicroStation has different types <strong>of</strong> models available in MicroStation. The model types are Design,<br />

Drawing and Sheet. The Design and Sheet models are used by ODOT for creating all new models.<br />

The other model types are Design From Seed, Drawing From Seed, and Sheet From Seed use a model’s<br />

attributes from a chosen seed file to create a model and are typically not used by ODOT for creating new<br />

models<br />

• Design – type model is used for creating design geometry that can be either 2D or 3D. All<br />

basemap information shall be drawn in the default design model. See Section 303.3 Basemap<br />

Design Files for more detailed information.<br />

• Drawing – type model serves as a Drawing Area for centralizing annotations that need to be<br />

shared across multiple sheets. A drawing model is always a 2D model. ODOT does not use the<br />

Drawing model at this time.<br />

• Sheet – type model is used to assemble the plan sheets that are used for plotting a set <strong>of</strong> plans<br />

that can be either 2D or 3D. Sheet border cells and annotations are placed in the Sheet model.<br />

See Section 303.4 Sheet Design Files for more detailed information.<br />

ODOT <strong>CADD</strong> <strong>Engineering</strong> <strong>Standards</strong> 65

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