## 4 Validation of Automatic 2D Drawing Generation Program
### Simplification of BIM-Based Permit Drawing  
#### 4.3.1 BIM-Based Permit Drawing Extraction  
As mentioned in Table 2, six types of drawings are required in the licensing process, and for each type of drawing, the minimized list of items are provided. However, although it is possible to simplify drawing creation items by applying BIM technology, separate and detailed drawings are required for major parts, the distance from the building line to the site boundary, and the external material finish of the elevation. In addition, because the current administrative system structure requires the simultaneous submission of BIM models and drawings, it is necessary to create a permit drawing. Such a drawing could be useful in the licensing process. In other words, a detailed review of the license holder will be possible through the submission of drawings and review results for the items that can be derived. To this end, it is required to create a BIM model according to the BIM design guidelines and to simplify drawing items by using it. In other words, items that can be accessed from BIM information, through the submission of drawings and models, the license holder will enable a detailed review of the licensing standards and conditions. For this, a BIM model should be created according to the BIM design guidelines and drawing items should be simplified using it. An example of a parking lot is a simplified license drawing element, such as that shown in Figures 7 and 8. However, in the case of BIM format, information such as the level difference, parking plan line (parking object), and parking space for a disabled person includes the attribute information \begin{table}
\begin{tabular}{l l c} \hline \hline
**Type of Document** & **Contents** & **Derivable Items** \\ \hline \multirow{6}{*}{Architectural plan} & Outline (location, site area, etc.) & \\ \cline{2-3}  & Regional District and City Planning Matters & \\ \cline{2-3}  & Building scale & \\ \cline{2-3}  & Parking area size & \\ \cline{2-3}  & (parking line, provision of parking lot, etc.) & \(\surd\) \\ \hline \multirow{6}{*}{Layout} & Scale and bearing & \\ \cline{2-3}  & Length and width of the road facing the site & \(\surd\) \\ \cline{2-3}  & Longitudinal and horizontal view of the site & \(\surd\) \\ \cline{2-3}  & Distance from the building line and land boundary line to the building & \\ \cline{2-3}  & Parking circulation and outdoor parking plan & \(\surd\) \\ \cline{2-3}  & Public open area and landscape plan & \\ \hline \multirow{6}{*}{Floor plan} & Floor plan of the first floor and standard floor & \(\surd\) \\ \cline{2-3}  & Location of pillars, walls, windows, etc. & \(\surd\) \\ \cline{2-3}  & Location of fire protection zones and fire doors & \(\surd\) \\ \cline{2-3}  & Location of corridors and stairs & \(\surd\) \\ \cline{2-3}  & Location of elevator & \(\surd\) \\ \hline \multirow{6}{*}{Elevation} & Elevation plan of 2 or more sides & \(\surd\) \\ \cline{2-3}  & External finishing material & \\ \cline{2-3}  & Plan for installation of signboards and building plates & \(\surd\) \\ \hline \multirow{3}{*}{Section} & Longitudinal and horizontal sections & \(\surd\) \\ \cline{2-3}  & Building height, height of each floor, and ceiling height & \(\surd\) \\ \hline \multirow{6}{*}{Structure} & Main structural plane and section & \(\surd\) \\ \cline{2-3}  & Detailed drawings of main structural parts & \\ \cline{2-3}  & Structure confirmation & \\ \hline Interior finish & Types of wall and ceiling finishes & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Design documentation items required at the licensing stage in Korea. of each object. The contents are described in Section 4.3.2. In the existing CAD format, most of the information required for the parking lot should be expressed in drawings and annotations. In other words, by reviewing information that excludes data that are visualized on a per-instance basis in the IFC data, a review of the license may be possible.