--- title: "How to use Global Coordinates" slug: "how-to-use-global-coordinates" tags: ["How to ..."] updated: 2026-06-23T07:42:56Z published: 2026-06-23T07:42:56Z canonical: "knowledge.navvis.com/how-to-use-global-coordinates" --- > ## Documentation Index > Fetch the complete documentation index at: https://knowledge.navvis.com/llms.txt > Use this file to discover all available pages before exploring further. # How to use Global Coordinates To process with control points measured using the global coordinate system: 1. Add one commented line in the control point CSV file. An example is shown in the first line below: ```plaintext #, CRS, EPSG:2169, id, x, y, z # this line is optional ABC, 1000000.0, 2000000.0, 3000000.0 DEF, 4000000.0, 5000000.0, 6000000.0 ``` 1. SiteMaker can process the data without error, and later one can directly import the processed data into IVION with the same coordinate system selected. > **Note**: when using this method, you'll still receive the following warning in the processing log: > > "Warning: At least one control point has a coordinate value outside of the range of a local metric coordinate system: |val| > 20000.0" > > This can be ignored as long as the processing is not interrupted by an error message. --- ### FAQ #### How do I add an EPSG code to a control point file? Add a commented line at the top of the control point CSV file: `#, CRS, EPSG:XXXX,` — replace XXXX with your EPSG code. For example, `#, CRS, EPSG:2169,`. NavVis SiteMaker reads this line and processes the data using the specified coordinate reference system.