Modeling Languages

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A modeling language is any artificial language that can be used to express information or knowledge or systems in a structure that is defined by a consistent set of rules. The rules are used for interpretation of the meaning of components in the structure; modeling languages can be either graphical or textual. The Unified Modeling Language (UML) is a general-purpose, developmental, modeling language in the field of software engineering, that is intended to provide a standard way to visualize the design of a system.

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We are exporting from Tekla to IFC format.
Some of the resulting  plate dimmensions are incorrect.
The problem seems to be the flat plate definition in the IFC file.
For example a 10 x 75 mm flat plate is defined as
#867= IFCRECTANGLEPROFILEDEF(.AREA.,'FL10*75',#169,10.,110.);
The plate ends up being 10mm x 110mm rather than 10mm x 75mm.
We can't figure out where the incorrect flat plate dimmension is coming from.
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Below is an extract taking from a paper available at: http://www.geog.ucsb.edu/~good/papers/414.pdf

I need to understand it please very well. It is all clear until he starts the second paragraph.
The second paragraph mentioned an indicator I am not sure I understand the whole second paragraph.  Please help to clarify I am starting to study these models and their integration with GIS. Thanks

A model is a computer program that takes a digital representation of one or more aspects of the real world and transforms them to create a new representation. Models can be static, if the input and the output both correspond to the same point in time, or dynamic, if the output represents a later point in time than the input.

The common element in all of these models is the operation of the GIS in multiple stages, whether they be used to create complex indicators from input layers or to represent time steps in the operation of a dynamic process. Static models often take the form of indicators, combining various inputs to create a useful output. For example, the Universal Soil Loss Equation (USLE) combines layers of mapped information about slope, soil quality, agricultural practices, and other properties to estimate the amount of soil that will be lost to erosion from a unit area in a unit time (Wischmeier and Smith 1978). The DRASTIC model (fig. 1) estimates geographic variation in the vulnerability of groundwater to pollution, again based on a number of mapped properties
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Modeling Languages

246

Solutions

1

Articles & Videos

451

Contributors

A modeling language is any artificial language that can be used to express information or knowledge or systems in a structure that is defined by a consistent set of rules. The rules are used for interpretation of the meaning of components in the structure; modeling languages can be either graphical or textual. The Unified Modeling Language (UML) is a general-purpose, developmental, modeling language in the field of software engineering, that is intended to provide a standard way to visualize the design of a system.

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