To Create a Survey Control Point

Use the Toolspace Survey tab to create a control point using known northing and easting, or latitude and longitude (if the survey database references a coordinate zone), and elevation coordinates, to be used for traverse and least squares adjustments.

To create a control point

1. In Toolspace, on the Survey tab, right-click the Control Points collection. Click New to open the New Control Point dialog box.
2. Enter the point number.
   Important: If there is a Survey Point (Non-Control point) with a matching number then the data for that point displays in the New Control Point dialog box. If there is no Survey Point defined in the Survey database that has a matching name, the program checks the active drawing to see if there is an Autodesk Civil 3D point with a matching number. If there is an Autodesk Civil 3D point with a matching number, then the point information displays in the New Control Point dialog box.
3. Optionally, enter the point name.
   Important: You can define a point by Name, or by deleting the number in the Number field and leaving it blank. Enter a Name in the Name field. If there is already a control point with that name an error message is displayed. If there is a Survey point with a matching name then the data for that point displays in the New Control Point dialog box. If there is no survey point or control point defined in the Survey database that has a matching name, the program checks the active drawing to see if there is an Autodesk Civil 3D point with a matching name. If there is an Autodesk Civil 3D point with a matching name, then the point information displays in the New Control Point dialog box.
4. Enter the easting (X-coordinate) of the new control point.
5. Enter the northing (Y-coordinate) of the new control point.
6. Optionally, enter the elevation (Z-coordinate) of the new control point.
7. Enter a description for the control point.
8. Optionally, enter the latitude of the point. The Northing property value is calculated from the value entered in this field.
   Note: This property is not available if the survey database does not have an assigned coordinate system zone.
9. Optionally, enter the longitude of the point. The Easting property value is calculated from the value entered in this field.
   Note: This property is not available if the survey database does not have an assigned coordinate system zone.
10. Click OK to create the new control point. The new control point is displayed in the control points list view in Toolspace.

To create a control point using the survey command language

1. In Toolspace, on the Survey tab, right-click on the network that you want to add the control point to. Click Survey Command Window.
2. To create a control point by northing and easting, at the Command line, enter:

   NE (point) [north] [east] (description)

   To create a control point by northing, easting, and elevation, at the Command line, enter:

   NEZ (point) [northing] [easting] (elevation) (description)

3. To create a control point by latitude and longitude (if the survey database settings reference a coordinate zone), enter:

   LAT LONG (point) [latitude] [longitude] (description)

Examples

The following example sets point 2 at northing 2000, easting 2000 with an elevation of 100, and a description of TP.

NEZ 2 2000 2000 100 TP

The following example sets point number 55 at latitude 45°16'17" and longitude 36°55'55".

LAT LONG 55 45.1617 36.5555

Command Syntax

NE (point) [northing] [easting] (description)

or

NEZ (point) [northing] [easting] (elevation) (description)

or

LAT LONG (point) [latitude] [longitude] (description)

Parameter	Definition
point	The point identifier of the new point. You do not need to assign a point number if auto point numbering is on.
northing	The northing of the point.
easting	The easting of the point.
elevation	The elevation of the point.
latitude	The latitude of the point. Enter this value using the current survey database Angle unit. Use a positive value to indicate a location above the equator, or a negative value for one below it.
longitude	The longitude of the point. Enter this value using the current survey database Angle unit. Use a positive value to indicate a location east of the prime meridian, or a negative value for a location west of the prime meridian.
description	An optional description associated with the point.