# ESRI ArcMap

ArcMap is a geographic information system (GIS) application that is part of Esri's ArcGIS suite of geospatial software. It is used primarily to view, edit, create, and analyse geospatial data.

## What you need

* OS Maps API added to an API project in the OS Data Hub with an API Key; see [Getting started with an API project](/os-apis/core-concepts/getting-started-with-an-api-project.md) for more information
* ESRI ArcMap version 10.5 or later

{% hint style="info" %}
**Note**: We used ArcMap 10.5 to create these instructions.
{% endhint %}

## Instructions

{% stepper %}
{% step %}
**Set up a connection**

Once a new project has been set up, open the Catalog window > *GIS Servers > WMTS Server*.

<figure><img src="/files/jP5X5GXBkGb6zBqdhGTC" alt="ArcMap UI showing Catalog window"><figcaption></figcaption></figure>
{% endstep %}

{% step %}
**Add OS Map s API**

In the Add WMTS Server dialog:

* **URL**: Copy your full OS Maps API WMTS endpoint address from the OS Data Hub and paste it into this field.
* **Other fields**: Leave these as they are. No other information is required.
* Click \_OK.

<figure><img src="/files/tr33DjclXWElIOWXbxoo" alt="ArcMap Add WMTS Server dialog"><figcaption></figcaption></figure>

*OS Maps API on api.os.uk* will now display in the list of GIS servers in the Catalog window.

<figure><img src="/files/mLqNAqC0Agkf6FpvdGrS" alt="ArcMap Catalog window showing OS Maps API on api.os.uk in GIS Servers"><figcaption></figcaption></figure>
{% endstep %}

{% step %}
**Adding layers to the map**

Click the *Add Data* button

<figure><img src="/files/IN3wV3C7LzShI1iWhQP2" alt="ArcMap UI showing Add Data button"><figcaption></figcaption></figure>

In the Add Data dialog:

* Browse to the folder where the OS Maps API is located.
* Select your preferred data layer.
* Click \_Add.

<figure><img src="/files/3tAKyVCSrxHFn2TTvjRF" alt="ArcMap Add Data"><figcaption></figcaption></figure>

\_The layer will then display in the map area:

<figure><img src="/files/hgJrRRy1BnGiG3slG8ly" alt="ArcMap UI showing OS Maps API data"><figcaption></figcaption></figure>
{% endstep %}
{% endstepper %}


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