In a previous blog post, we introduced how to query coordinate systems and their parameters (Tech Chat | Querying Coordinate Reference Systems for GNSS and Surveying Projects). In practical work, if the required coordinate system is not pre-defined in the template list of SingularPad, it can also be manually defined to ensure correct measurement results.

In this blog, we will use the NAD 1983 Lambert Conformal Conic (Contiguous USA) coordinate system as an example to demonstrate how to import its parameters into SingularPad.

Step 1 Access the Coordinate System Settings

Open SingularPad and go to Project >>> Coordinate System.

Alternatively, you can go to Project >>> Project Manager to create a new project and set the coordinate system during project creation.

Step 2 Prepare Coordinate System Parameters

View the parameters of the NAD 1983 Lambert Conformal Conic (Contiguous USA) coordinate system retrieved from EPSG, as shown in the figure.

We need to import the ellipsoid parameters and projection parameters.

Step 3 Configure Ellipsoid and Projection Parameters

1. Import Ellipsoid Parameters

Go to Ellipsoid Parameter and check whether the required ellipsoid already exists.

• If available, select it and click OK

• If not, click Add to define it manually

Enter the Ellipsoid Name, Semimajor Axis, and the Reciprocal of the Flattening (1/F), and then click OK to save.

2. Import Projection Parameters

Go to Projection Parameter, select a suitable projection model (in this example, Lambert Conic Conformal (2SP))

Enter the following parameters:

• False Northing

• False Easting

• Longitude of Origin

• Latitude of Origin

• Standard Parallel 1

• Standard Parallel 2

Click OK to save the projection settings.

After completing the above steps, return to the Coordinate System Parameters interface and click OK to apply the coordinate system to your project.

Note:

When entering latitude and longitude, pay attention to the latitude and longitude format you set in the software. You can view this in Project >>> Software Settings. When entering latitude and longitude, you must follow the format you set. 

For example, if you set the latitude and longitude format to dd°mm'ss.ssss", and you want to set the latitude and longitude to 43°14′2.95″, you need to enter the value 43.140295 to ensure the software recognizes the correct latitude and longitude.

When a required coordinate system is not included in the built-in list, manually importing its parameters provides a practical way to ensure correct project setup. By defining the ellipsoid and projection parameters accurately, users can apply custom or less common coordinate systems directly in SingularPad and proceed with surveying tasks as needed.