VIA 2.0 · User Guide

Coordinate Systems

Choose the working grid used by your project.

For VIA 2.0. Some controls are unavailable in earlier versions.

A coordinate reference system (CRS) gives meaning to Easting and Northing. Choose the project grid before interpreting an alignment or reference coordinates. Similar-looking coordinate values can belong to different systems.

Select a stored system

1. Open Settings → Coordinate System.
2. Tap Active coordinate system.
3. Select the required system. Check its name and code back in Settings before continuing.

Find another coordinate system

1. With an internet connection, tap Fetch.
2. Enter a system name or code in Search coordinate systems and submit the search using the keyboard.
3. Tap the matching result. VIA adds it locally and makes it active.

Understand the result

VIA transforms device latitude/longitude into the selected working grid. Imported reference E/N values remain as supplied: changing the CRS changes their map interpretation, not their stored values. Alignments must already use coordinates compatible with your chosen grid.

The horizontal transformation passes altitude through; it does not convert it to a project level datum. Confirm the height source before using an exported Level as an engineering level.

If coordinates look wrong

Check the project’s CRS, units and a known control point. Changing display order to Northing/Easting does not transform coordinates or rearrange import columns. A system appearing in the catalogue does not establish that every datum transformation or external grid resource is available. Resolve discrepancies before relying on the result.