# Coordinate Systems and Projections

### Export options

Select the coordinate system in which the layer will be exported.

**-Use the map coordinate system-**

The coordinate system selected for the map (not on the layer!) is used for the export. The EPSG code of the coordinate system is displayed in the export dialogue, but you cannot change it there.

**-Ask user-**

In the export dialogue, the EPSG code of the coordinate system set on the map is automatically specified. However, the coordinate system to be used can be changed by selecting the desired coordinate system from the integrated dictionary at the EPSG code field.

**-Fixed system-**

Here, at the EPSG code field, define a coordinate system to be used when exporting this layer. The EPSG code of the coordinate system is displayed in the export dialogue, but it cannot be changed there.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.geodin.com/maps/coordinate-systems-and-projections.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
