Abstract
Three-dimensional landform data are generated by mobile mapping system, laser profiler, laser scanner, UAV and so on. However, three-dimensional landform data are not utilized through the lifecycle of civil infrastructure. Three-dimensional landform data are the basis of Construction Information Modeling (CIM). There are no standards for representing and drawing three-dimensional landform data.
This paper considered the three-dimensional drawing standard intended for landform with a goal of establishment of three-dimensional drawing and three-dimensional CAD drawing standards. In this paper, the eight existing specifications were investigated for extracting common specifications with three-dimensional landform data and were mapped with the relation. The use cases of three-dimensional landform data were investigated reviewing the experts and the existing papers. If three-dimensional drawing standard for landform is standardized, high accuracy three-dimensional landform data is produced. By using high accuracy three-dimensional landform data, high accuracy map data will be produced. And, the data are utilized for supporting plan, design, construction, and maintenance in civil infrastructure.
And, the three-dimensional drawing standard for landform was defined. We targeted the landform and standardized a common specification of landform in civil infrastructure domain. The landform is composed of the existing landform such as road, bridge, river, and so on and newly developed land. The three-dimensional drawing standard is standardized the notation of drawing and the view.
The table of contents for three-dimensional drawing standard was proposed. There are two chapters; general rule and three-dimensional drawing standard for landform. In general rule chapter, it is necessary to represent definition, application range, method of thinking and words and terms. three-dimensional drawing standard for landform proposed to define the contents of conformance class, level of detail, management information, annotation, used point, line, surface and solid, and features.
