QUICK START

For your convenience, the 1D, 2D and 3D files on the Sample Files page can be loaded into a test project.

  1. Launch Columbus 4.5.
  2. On the Data page, select a sample file from the Select Sample File drop-down list. The displayed stations and observations can be modified.
  3. Set the Preference Settings and Adjust Settings as described.
  4. On the Adjust page, click the Start button. The Adjustment Output displays as the adjustment progresses.

Alternatively, go to the Adjust File page, and select a sample file from the Select Sample File drop-down list. The adjustment will start immediately.


How Columbus is organized

Columbus is organized into five pages:


Data

There are three ways to import data into Columbus:

  1. Import data from a Columbus or third-party file.
  2. Enter data directly within the data grids.
  3. Any combination of #1 and #2.

Note: Latitude and longitude must always be provided in DMS (degree, minute, second) units. For example:

N 40-10-15.123456 must be entered as: 40.1015123456
S 40-10-15.123456 must be entered as: -40.1015123456 (negative)

E 105-3040111111 must be entered as: 105.3040111111
W 105-3040111111 must be entered as: -105.3040111111 (negative)


Adjust and Adjust File

There are two ways to perform network adjustments within Columbus, each with its own advantages:

  1. Adjust: Based on the active project.
  2. Adjust File: Based on a file.

Adjust

This method uses data that has been imported into Columbus or loaded from a current project. Prior to adjustment, you can modify preference settings on the Preferences page and define the network type on the Adjust page. After adjustment, you will have the opportunity to save the adjusted coordinates and all preference settings into a file for future retrieval.


Adjust File

This method assumes you have created a network adjustment data file. When you select the file, the adjustment immediately runs and reports the results.

Note: These results cannot be used anywhere else within Columbus.

Everything that defines the adjustment (datum, stations, observations and configuration settings) must be defined in the file. If you don't modify this file, each adjustment (from this file) will yield identical results.


Tools

This is where you can perform a variety of tasks, including Geoid and Deflection Modeling, Traversing, Inversing and more...


Preferences

Preference settings are applied when running adjustments, traverses, inverses, etc.