> For the complete documentation index, see [llms.txt](https://inj9.gitbook.io/ifc-geosupport-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://inj9.gitbook.io/ifc-geosupport-guide/review-of-application/how-use-a-program.md).

# How use a program?

Let's run oue application - how do it go to previous page. 

![Start window of application](/files/-MNNWjK32d2D5R6u6-e6)

Now we need to add info about coordinates in old and new systems. You can go to Data Samples chapter and get parameters for testing from there. 

**Note:** In your case to get initial coordinates of points you can use free IFC viewers that let mark a coordinate's labels such for example Solibry Model Viewer or BIM-Vision

![Screen from BIM-Vision to get coordinates of points](/files/-MNNffo_IC47y3LyVeI0)

OK, we have a coordinates of three points in both systems. Now - add them to fields:

![Add info about points in both systems](/files/-MNNXXSnK-a2_Pperp-r)

Then, press to "Расчет" button to start a Math's algoritm. After finishing, you may see in Console resulting values:

![Result of calculating](/files/-MNNXsU2dn2NDSIk-mJK)

Lets's save those parameters to external XML-file, to do it press to button "Save" opposite "Сохранить результаты расчета" and select filename to saving. In next program's setup we will use that saving parameters (if we work in one model and periodically need to export it with shared coordinates to another software). Code of XML's file looks like as sample below:

```
<?xml version="1.0" encoding="utf-8"?>
<TransformationParameters Name="1">
  <Value_dX Units="meters">2216581.214999</Value_dX>
  <Value_dY Units="meters">530017.018883</Value_dY>
  <Value_dZ Units="meters">138.5</Value_dZ>
  <Value_ωz Units="radians">4.35491400025482</Value_ωz>
  <Accuracy>1.903E-06</Accuracy>
</TransformationParameters>
```

After calculating parameters and saving it to XML-file (no compulsory step), let's select IFC file that need to convert in shared coordinates - button "Выбор" and select path to save new file - button "Обзор". After it we need select a parent-software (where IFC fie was created). After all changings press to "Запуск" and if all is goog, we will seen in Console next message:

![Finish of writing to file](/files/-MNNZVPD4CFD3BuznaK5)


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