Survey points are a collection of elevation points with x-, y-, and associated z-values. These points generally represent a series of points showing the high and low extremes in the terrain that define topographic features such as streams, levees, ridges, and other phenomena.
The Add Survey Points command of CivilGEO software is used to add survey point data as a layer to the Map View.
Follow the steps below to use the Add Survey Points command:
- From the Map Data ribbon menu, select the Add Survey Points command.
- The Select Survey Points File dialog box will be displayed. Now, from the folder containing the supported survey points file, select the desired file type and then click the [Open] button.
- The Add Points dialog box will be displayed showing the content details of the selected survey points file.
The following sections describe the Add Survey Points command and how to interact with the above dialog box.
Point Layer Details
This section allows the user to create a new point layer in the Map Data Layers panel. New Points is the default point layer name, which can be changed by the user. The user can also add points to the existing point layer by using the Add points to existing point layer option. Note that the Add points to existing point layer option is only enabled when the user has already defined the point layer.
Point File Format Specifications
In this section, the Point file format dropdown combo box is used to select the file format into which the survey points data are to be imported. The file needs to be in an ASCII text file format, with either commas, tabs, or spaces delineating the data fields contained within each row of the survey points file.
The software will attempt to determine the selected survey points file format based on the file extension. However, the user can change the file format to be used after the file is selected.
For reference, Easting = X coordinate and Northing = Y coordinate.
The following survey points file formats are supported:
- ASC (ASCII text file)
- CSV (Comma-Separated Variables)
- ENZ (Easting, Northing, Elevation)
- NEZ (Northing, Easting, Elevation)
- PENZ (Point, Easting, Northing, Elevation)
- PENZD (Point, Easting, Northing, Elevation, Description)
- PNEZ (Point, Northing, Easting, Elevation)
- PNEZD (Point, Northing, Easting, Elevation, Description)
- PNT (ASCII Point File)
- PTS (ASCII Point File)
- TXT (ASCII Point File)
- XYZ (Easting, Northing, Elevation)
However, changing the file format also changes the column header(s) of the point file format table. For example, changing the file format from ENZ (Easting, Northing, Elevation) to PENZD (Point, Easting, Northing, Elevation, Description) will display the additional column header(s) in the table as shown below.
Elevation Data Adjustment
This optional section allows the user to adjust the survey points data elevation values if the elevation data is in a different unit system or needs to have a datum adjustment.
Duplicate Point Removal
In this section, the Ignore duplicate points, tolerance check box option is used to ignore/filter out the duplicate points from the survey file. The user can enter the desired tolerance value (in feet) by which the duplicate points are to be removed from the survey file. Alternatively, the user can check the Load as Point Cloud check box option to import the survey points as a point cloud.
After specifying all the required importing details, click the [Import] button to add the survey points to the Map View.