# 3. Perform a Site-Specific Analysis

> 🎥 Watch the video:\
> [**Add Site-Specific Conditions in Shapemaker**](https://www.youtube.com/watch?v=MLpbymcOHVs\&list=PLFUxZkTQFRFTX9eq9Ajt8h87pvWaNiFta\&index=4\&ab_channel=Shapemaker)

## 📍 Why It Matters

Eurocode requires that you consider site-specific conditions:

* **Terrain category** (e.g. open sea, suburban, forest)
* **Orography effects** (e.g. hills, escarpments)

If you're not accounting for these, you may:

* Be **overly conservative**, rejecting co-locations that could be accepted
* Or worse, **underestimate loads**, risking structural non-compliance

## 🛠️ Step-by-Step Instructions

1. Select the location tab and input the coordinates of your site. Example: 62.45246, 6.38183.
2. Select the correct national annex.

<figure><img src="https://451777108-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6GQOhDmRM226SOi8J4Pp%2Fuploads%2FyckTGYFn3lwC2jlYbNLt%2Fimage.png?alt=media&#x26;token=48ebc42d-4291-4a72-bfb3-ce9bf4b8865b" alt=""><figcaption></figcaption></figure>

{% hint style="success" %}
Shapemaker supports a wide range of national annexes and standards and are continuously adding more.
{% endhint %}

3. After saving, press `Automatic wind profile` to perform an automatic site specific assement. This includes

* Finding the `Fundamental basic wind velocity` based on local wind maps
* For each wind direction, finding the `Terrain Category`&#x20;
* For each wind direction, calculating the `Orography factor`&#x20;

{% hint style="info" %}
All site-specific values can be overruled by the user by clicking `Edit wind profile`
{% endhint %}

<figure><img src="https://451777108-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6GQOhDmRM226SOi8J4Pp%2Fuploads%2F5bSY3TOAAMeJGlIdsjIJ%2Fimage.png?alt=media&#x26;token=f17bc3fc-70cb-4d10-9644-7b930319cc8d" alt=""><figcaption></figcaption></figure>

<figure><img src="https://451777108-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6GQOhDmRM226SOi8J4Pp%2Fuploads%2FgU3HbYENHdDXFjRaiaGL%2Fimage.png?alt=media&#x26;token=2183d8a6-8444-4861-8752-4f9f222488e4" alt=""><figcaption></figcaption></figure>

{% hint style="success" %}
If you have precise updated wind data for a site, you can upload and use that data!
{% endhint %}

## ✅ You Now Have

* A site-specific wind profile for your structure according to your national annex
* Terrain and orography effects integrated into your analysis