background image

Chapter:  Building a Survey Quality Surface 

Lesson:  Building Surfaces from Survey Data 

 

161 

5.1.1  Creating a Point Group to Be Used As Surface Data 

Before you create the surface you need to create a 

Point Group

 that will be used to select only the points that 

you want to use for the surface data.  Points that should not be included in the surface should not be included 

in the point group.  Points for utility potholes or points that are part of the project for horizontal control and do 

not have accurate surface elevations are examples of points that should not be included in this group. 

1.  Continue working in the drawing 

Design.dwg

This drawing contains the 

Points, Alignment, Parcels

, and 

Surface

 from the previous chapters.  Currently only 

the parcel lines and labels are displayed. 

2.  On the 

Prospector

 tab of the 

Toolspace

,

 right-click on 

Point Groups

 and select 

 New

3.  Enter 

Topo

 for the 

Name

4.  Select the 

Raw Desc Matching

 tab in the 

Point Group Properties

 dialog box

 

5.  Select the description keys 

AEC, DT, DWYRK, DWYAC, GND, LP, TOE, 

and

 TOP. 

6.  Click 

<<OK>> 

to create the 

Point Group

 

Summary of Contents for AutoCAD Civil 3D 2013

Page 1: ...A Practical Guide to AutoCAD Civil 3D 2013 Rick Ellis A Cadapult Software Solutions Publication ...

Page 2: ...y attempt to ensure the accuracy of the contents of this book the publisher and author make no representations or warranty with respect to accuracy or completeness of the contents in this book including without limitation warranties of fitness for a particular purpose The datasets included in this book are for training purposes only AutoCAD Civil 3D and AutoCAD are registered trademarks of Autodes...

Page 3: ...utoCAD since 1985 He pioneered the position of Staff Geographer and later served as CAD GIS Manager at a multi disciplinary engineering consulting firm Russell has served as technical editor for many of Cadapult Software Solutions training books and has co authored and contributed to several other books on CAD GIS and technical graphics software Russell can be reached at russell cadapult software ...

Page 4: ...u complete prior lessons With this course organization you can customize your own individual approach to learning AutoCAD Civil 3D When you complete this course you will be armed with the background and knowledge to apply AutoCAD Civil 3D to your job tasks and become more effective and productive in your job Course Objectives The objectives of this course are performance based In other words once ...

Page 5: ... and Move If you are not familiar with these functions you can refer to the AutoCAD Help system throughout the course to gain the fundamental skills needed to complete the exercises Conventions The course uses the following icons and formatting to draw your attention to guidelines that increase your effectiveness in AutoCAD Civil 3D or provide deeper insight into a subject The magnifying glass ind...

Page 6: ... Setup exe Double click setup exe and follow the instructions for installation Unzip the Files Unzip AutoCAD Civil 3D Training zip directly to the C drive The zip file will create the following folder structure C A Practical Guide Civil 3D 2013 Several folders are created below the Civil 3D 2013 folder that contain the source data you will use for the exercises in this book A folder called Chapter...

Page 7: ...taching Source Drawings 39 2 2 2 Defining a Query 42 2 2 3 Saving Changes Back To the Source Drawings 44 2 2 4 Defining a Compound Query 46 Chapter 3 Preliminary Layout 53 3 1 Lesson Creating a Preliminary Existing Ground Surface 54 3 1 1 Creating a Surface 57 3 1 2 Adding Surface Data 59 3 1 3 Changing the Surface Style to Control Display 62 3 1 4 Managing Drawing Settings 64 3 1 5 Using the Obje...

Page 8: ...117 4 3 5 Controlling Point Label Size in Model Space 118 4 3 6 Controlling Point Group Display Order 119 4 4 Lesson Drawing Linework Using Transparent Commands 120 4 4 1 Drawing Lines by Point Number 123 4 4 2 Drawing Lines by a Range of Point Numbers 124 4 4 3 Drawing Lines by Point Object 125 4 5 Lesson Working with Parcels 127 4 5 1 Defining a Parcel from Existing Geometry 129 4 5 2 Creating a...

Page 9: ... 4 2 Controlling Contour Display 192 5 4 3 Labeling Contours 195 5 4 4 Moving Contour Labels 196 5 4 5 Deleting Contour Labels 196 5 4 6 Labeling Only the Major Contours 197 5 4 7 Editing Contour Labels 198 5 4 8 Controlling Surface Display for Performance 201 Chapter 6 Working with Alignments 203 6 1 Lesson Creating Alignments 204 6 1 1 Default Curve Settings 206 6 1 2 Creating Tangents with Curv...

Page 10: ...mpling and Drawing the Profile 251 7 1 2 Changing the Profile View Style 257 7 1 3 Creating a Profile View Style 258 7 1 4 Creating Additional Profile Views 265 7 2 Lesson Creating Finished Ground Profiles 267 7 2 1 Constructing the Finished Ground Centerline 272 7 2 2 Editing the Profile Graphically 274 7 2 3 Editing the Profile in Grid View 275 7 2 4 Working with Profile Labels 276 7 2 5 Adding ...

Page 11: ...iting a Pipe Network in Profile 337 9 2 3 Labeling a Pipe Network in Profile 338 9 3 Lesson Working with Pressure Networks in Plan 339 9 3 1 Laying Out a Pressure Network 341 9 3 2 Adding a Lateral to a Pressure Network 343 9 4 Lesson Working with Pressure Networks in Profile 345 9 4 1 Creating a Profile View with a Pressure Network 348 9 4 2 Editing a Pressure Network in Profile 351 Chapter 10 Gr...

Page 12: ...cuts 379 11 1 Lesson Sharing Project Data with Data Shortcuts 380 11 1 1 Setting the Working Folder 385 11 1 2 Creating a Data Shortcut Project 386 11 1 3 Creating Data Shortcuts 387 11 1 4 Creating Data Shortcut References 388 ...

Page 13: ...files Sections Corridor Models and Grading as well as Volume Calculations that you create later in the project are all based on this Surface This chapter will explore ways to create an existing ground surface from survey data as well as ways to check display analyze and edit the surface Lesson Building Surfaces from Survey Data In this lesson you will learn to build a surface from different types ...

Page 14: ... will work with points that will be managed with a Point Group and breaklines that you will create based on some of those same survey points Key Concepts Concepts and key terms covered in this lesson are Surface Points Point Group Breaklines Surface Styles Objectives After completing this lesson you will be able to Create a Point Group for use building a Surface List the types of data that can be ...

Page 15: ...gles inside of the boundary o Creates a hole in the surface o Can be used for building footprints to keep contours from crossing through them Data Clip o Keeps data outside this boundary from being added to the surface o Must be added before other surface data or moved up in priority in the surface definition o Useful for limiting the size of large datasets Non destructive breakline boundaries Out...

Page 16: ...forced as triangle edges Types of breaklines Standard o Defined by selecting 3D polylines 3D lines feature lines or splines Proximity o Defined by selecting a 2D polyline feature line or spline o The vertices of the breakline are snapped to the nearest point in the TIN or closest proximity o Accuracy is dependent on how close the vertices of the proximity breakline are to the points in the TIN o C...

Page 17: ...ature contour data tends to create flat triangles that do not accurately reflect the surface there are several options to minimize those flat triangles DEM Files DEM files Digital Elevation Models are grid based surfaces This is a format that is used by many different Civil Survey and GIS programs Drawing Objects AutoCAD object that have elevations can be used to build a surface These objects incl...

Page 18: ...ference to a selection of survey points that are included in a survey database If the points in the survey database are updated the surface will be marked as out of date and will use the updated values when it is rebuilt Figure Survey Queries Figure Survey Queries are a dynamic reference to a selection of survey figures that are included in a survey database If the figures in the survey database a...

Page 19: ...part of the project for horizontal control and do not have accurate surface elevations are examples of points that should not be included in this group 1 Continue working in the drawing Design dwg This drawing contains the Points Alignment Parcels and Surface from the previous chapters Currently only the parcel lines and labels are displayed 2 On the Prospector tab of the Toolspace right click on ...

Page 20: ... the Prospector This is where you will access the surface definition commands and add data to the surface 5 1 3 Adding Point Group Data to a Surface Point information contained in a Point Group can be added to a Surface through the Prospector Once the Point Group is added the Surface is automatically rebuilt to incorporate and display the new data 1 On the Prospector tab of the Toolspace expand Su...

Page 21: ...Enter 3P at the command line to start the 3D Polyline command 5 Enter PN to change the prompt to Point Number Alternatively you can also select the Point Number button from the Transparent Commands toolbar 6 At the command line enter 1408 1447 and Enter to draw the line 7 Esc to end the Point Number prompt 8 Enter to end the line 9 Enter 3P at the command line to start the 3D Polyline command 10 U...

Page 22: ...w 3 Right click on point 1110 and select Zoom to You may want to zoom out some to see the surrounding points 4 Enter 3P at the command line to start the 3D Polyline command 5 Enter PO to change the prompt to Point Object Alternatively you can also select the Point Object button from the Transparent Commands toolbar 6 Pick point 1110 from the screen 7 Then pick points 1109 1108 1107 and 1106 to dra...

Page 23: ... points 1116 1117 1118 1119 and 1120 11 Enter to end the Point Object prompt 12 Enter again to end the line 13 Starting at point 1111 define a third breakline along the bank of the ditch using the PO transparent command and points 1111 1112 1113 1114 and 1115 14 Enter to end the Point Object prompt 15 Enter again to end the line 16 Save the drawing The three new breaklines will look like the graph...

Page 24: ... set of Collected in Field 6 Confirm that the Type is set to Standard You will not use any Weeding or Supplementing factors in this exercise These options allow you to remove or add vertices to breaklines respectively These are useful options if you have breaklines that have been over digitized and may have thousands of extra vertices very close together or if you need to add vertices to a breakli...

Page 25: ... to rotate the surface in 3D Once you rotate to a 3D view the contours will change to 3D faces This is controlled by the surface object style 4 If the surface is not shaded right click and select Visual Styles Shades of Gray 5 Continue to rotate the surface to examine it from different angles You will notice a large hole or spike in the surface 6 When you are finished viewing the surface close the...

Reviews: