openlayers-map-array-properties.html in Openlayers 6
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help/openlayers-map-array-properties.html
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The following describes the basic properties that are available in the map array.
<ul>
<li><strong>id</strong>
<dl>
<dt>Values:</dt>
<dd>string</dd>
<dt>Description:</dt>
<dd>This is the string identifier for the map used in PHP and Javascript. It will be the HTML identifier as well.</dd>
<dt>Example:</dt>
<dd>'example-id'</dd>
<dt>Notes:</dt>
<dd>This should be unique. The render function will assign an ID, if none is present.</dd>
</dl>
</li>
<li><strong>projection</strong>
<dl>
<dt>Values:</dt>
<dd>string (number)</dd>
<dt>Description:</dt>
<dd>This is the main projection that will be used on the map.</dd>
<dt>Example:</dt>
<dd>'900913'</dd>
<dt>Notes:</dt>
<dd>The default is 4326.</dd>
</dl>
</li>
<li><strong>width</strong>
<dl>
<dt>Values:</dt>
<dd>string</dd>
<dt>Description:</dt>
<dd>The CSS valid width for the map.</dd>
<dt>Example:</dt>
<dd>'auto'</dd>
</dl>
</li>
<li><strong>height</strong>
<dl>
<dt>Values:</dt>
<dd>string</dd>
<dt>Description:</dt>
<dd>The CSS valid hright for the map.</dd>
<dt>Example:</dt>
<dd>'300px'</dd>
</dl>
</li>
<li><strong>center</strong>
<dl>
<dt>Values:</dt>
<dd>array</dd>
<dt>Description:</dt>
<dd>The default centering properties for the map, including lat, lon, and zoom.</dd>
<dt>Example:</dt>
<dd>
<pre>
array(
'lat' => 40,
'lon' => 5,
'zoom' => 5,
),
</pre>
</dd>
</dl>
</li>
</ul>