NOTES Module 04 Survey In this module, you learn how to use survey functionality in AutoCAD Civil 3D. This functionality enables you to automatically create pre-engineering base plans and existing ground surface models directly from field survey data. Survey data is required to gather information of the site prior to beginning the design. This data typically consists of locating and identifying coordinates/elevations of both spot and linework features. A Total Station or GPS (global positioning satellite) survey are the most common tools for collecting survey data. Surveyors produce information upon which a design can be based. This information is provided to site designers, and usually consists of a pre-engineering base plan, an existing ground surface model, and a reduced coordinate point file. Objectives After completing this module, you will be able to: Configure and identify the main components of the Civil 3D survey environment. Create a survey database and network. Create figure styles to control the display of figures. Create figure prefixes to assign figure styles to figures. Describe the main characteristics of the Autodesk fieldbook file format. Import a fieldbook file to Civil 3D. Make changes to observation data in the survey database. Create points and figures from survey data.AutoCAD Civil 3D 2009 Education Curriculum NOTES 04-2 Notes Data for this module resides in the \AutoCAD Civil 3D 2009 Education Curriculum\Module04 - Survey\ folder. A fieldbook file is also provided for the Module. It is located in the same folder and is called Survey.fbk. Student Exercises The following exercises are provided in step-by-step format. Open the Civil 3D program prior to beginning the lesson by double-clicking the Civil 3D icon on your desktop. If you are working in the Imperial system, you should use the drawing files beginning with the letter I, while those working in the metric system should use the drawing files beginning with the letter M. You are provided with a drawing for each exercise in the lesson. The exercises in this module are as follows: 1. Configure the Civil 3D Survey Environment 2. Create the Survey Database 3. Create the Survey Network 4. Create Figure Styles 5. Create Figure Prefixes. 6. Review the Fieldbook File 7. Import the Fieldbook File 8. Edit Survey Data in the Survey Toolspace 9. Create Points and FiguresModule 04 - Survey NOTES 04-3 Survey The Survey module focuses on the collection and reduction of pre-engineering topographic and planimetric survey data. The survey data is used to create the base plan and the existing ground surface model. Both of these elements are required by the engineer to complete the design. The base plan is a plan view drawing that shows existing conditions. The base plan typically consists of line work and symbols. The line work is used to represent pavement edges, centerlines, sidewalk edges, gutter lines, ditches, and other types of linear features. Symbols are used to represent spot features such as catch basins, fire hydrants, and power poles. The creation of the pre-engineering base plan and the existing ground surface model is the responsibility of the survey organization or department. Those groups involved with this work strive to automate the processes as much as possible. The following elements are required to automate the process: Surveyors are consistent with their use of field codes that represent specific features. Surveyors apply field connectivity codes to automatically generate base plan line work as the data is imported to AutoCAD Civil 3D. Examples include Begin, End, Continue, C3, and Recall. Base plan line work is assigned to layers automatically and can also be defined as breaklines for the surface. Point groups for surface modeling are predefined in the drawing template (DWT). These filter invalid data from the surface model, such as pipe inverts and tops of fire hydrants. Description key sets associate point style and point label style to each point. Civil 3D represents survey data with a survey network object. The Survey Network style, as with other Civil 3D object styles, controls the display of the survey network.AutoCAD Civil 3D 2009 Education Curriculum NOTES 04-4 Survey figures are used to display base plan line work. Figure styles control the display of the base plan line work. Survey figures can also be converted to breaklines for the existing ground surface model.Module 04 - Survey NOTES 04-5 Key Terms Survey Tab The Survey tab is positioned below the Prospector tab and the Settings tab in the Toolspace window. You use the Survey tab to manage survey databases, survey networks, survey data, and survey system settings. Base Plan The base plan is the Civil 3D drawing that represents existing conditions before the design begins. Base plans show existing features such as roads, sewers, light poles, and manholes. These features are represented using Civil 3D point objects to represent spot features, and feature lines to represent linear features. The engineer must become familiar with the existing conditions prior to beginning the design work. Base plans are created directly from the survey raw data file. Observation Data Observation data is the raw data format created from Total Station survey data-collection equipment. Survey observations typically consist of a measured horizontal angle, vertical angle, and slope distance record. The survey raw data file also contains information such as control coordinates, height of instrument, and height of rod. The final coordinates are calculated when the survey data is imported to Civil 3D. Reduced Coordinates Reduced point coordinates are created from observation data. Reduced coordinates typically refer to the northing and easting point coordinate attributes. Survey sideshot points are represented with angular measurements in observation data. When imported to the drawing, sideshot point data is converted to reduced coordinate point data. Fieldbook File The fieldbook (FBK) file is an AutoCAD Civil 3D observation file. Different brands of survey data collectors have their own observation data file format. These observation data files are converted to the AutoCAD Civil 3D fieldbook files, which are then imported to AutoCAD Civil 3D. Coordinates are calculated as fieldbook file data imported to the Civil
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