Overview of Coordinate Geometry Commands

 
 
 

Use the coordinate geometry (COGO) input commands to enter accurate geometry when creating objects. For example, you can create parcel boundaries from legal documents or survey data.

Typical field sketches showing points defined by distance-distance (left) and bearing-bearing (right).

You can access COGO commands from the COGO Input dialog box. The COGO Input dialog box is available on the ribbon as well as on the tool bar of the Task PaneSurvey tab. You can also enter COGO data “transparently” (while running other commands) by entering ‘mapcogo at the command prompt.

For example, start the Polyline (PLINE) command. When prompted for the next point in the polyline, enter ‘mapcogo. The COGO Input dialog box appears. Select a COGO routine, and enter the COGO data to calculate the new point. When you finish specifying the point, the Polyline command prompts you to enter the next point. You can enter the point normally, or you can start another transparent command to specify the point.

Note

You can still access most COGO commands transparently by typing an apostrophe (‘) plus the command name (AD, BB, BD, DD, DDIST, ZD). Orthogonal/Offset and Inverse Report are only available from the COGO Input dialog box.

It can be very helpful to enable node object snapping when specifying points using coordinate geometry. Node object snapping allows you to snap to point objects in the drawing window, which makes selecting points much easier.You can enable this option in the AutoCAD Drafting Settings dialog box. See the AutoCAD help for more information.

To create a point using the COGO Input dialog box

  1. Click Home tabDraw panelCOGO drop-downCOGO Input.At the Command prompt, enter mapcogo.
  2. In the COGO Input dialog box, select the routine to use.
  3. Enter the appropriate data in the Input section.
  4. Click Calculate. AutoCAD Map 3D calculates the new point, and previews it on your map. Click Pan to pan to the new point.
  5. Click Create Point.

To create a point using the COGO Input dialog box transparently

  1. Start a command, such as PLINE.
  2. When prompted for input, instead of specifying the input, enter ‘mapcogo at the command prompt.
  3. In the COGO Input dialog box, select the routine you want to use.
  4. Enter the appropriate data in the Input section.
  5. Click Calculate. AutoCAD Map 3D calculates the new point, and previews it on your map. Click the Pan button to pan to the new point.
  6. Click Create Point.
  7. When the transparent command finishes, continue responding to the prompts for the original command.

To use COGO commands

To do this... Use this method...
Use an angle and a distance from another point to create an object. Use COGO to enter angle and distance to specify a point.
Use a bearing and a distance from another point to create an object. Use COGO to enter bearing and distance to specify a point.
Use bearings from two points to create a point. Use COGO to enter two bearings to specify a point.
Use a deflection angle and a distance from another point to create an object. Use COGO to enter deflection angle and distance to specify a point.
Use distances from two points to create a point. Use COGO to enter two distances to specify a point.
Use azimuth and distance from another point to create an object. Use COGO to enter azimuth and distance to specify a point.
Use an offset distance from a line to create a point. Use COGO to enter distance and offset to specify a point.
Generate an inverse report to determine the relationship between two points. Use COGO to create an inverse report.