Add offset to a marker when multiple markers are on same coordinates.

Any ideas on this one please?

That’s not something the plugin supports, but a Google search turned up these:

• https://blog.mackerron.com/2011/06/22/overlapping-marker-spiderfier/
• https://stackoverflow.com/questions/3083707/marker-off-set-on-google-map-api-v3
• https://groups.google.com/forum/?fromgroups=#!topic/google-maps-js-api-v3/P7_p11YfJR4

You might also want to try looking at https://automattic.com/map/ and zooming into cities like Portland and San Francisco. View the source to see how they get them spread out.

If you get it working, please post a link to the code here so that others can use it too.

Thanks a lot, that gave me some ideas.

I have added this function to my themes functions.php file:

function addBGMPOffsetOnDuplicates( $placemarks )
{
	//	Todo: store the coordinates in an array and search through that. Tried it, didn't work, the search came up empty every time.

    $newPlacemarks = array();

	$doneCoordinates = ""; //Store coordinates we have checked out

	foreach( $placemarks as $placemark )
	{
		$coordinates = $placemark['latitude'] . $placemark['longitude']; //Get the coordinates x and y set

		while (substr_count($doneCoordinates, $coordinates) > 0)			// Do these coords exist in our buffer?
		{
			$longitude = (double)$placemark['longitude'];
			if (is_float($longitude))
			{
				$longitude -= 0.0000030;							//Add offset
				$placemark['longitude'] = strval($longitude);
			}

			$latitude = (double)$placemark['latitude'];
			if (is_float($latitude))
			{
				$latitude -= 0.0000030;								//Add offset
				$placemark['latitude'] = strval($latitude);
			}

			$coordinates = $placemark['latitude'] . $placemark['longitude']; //Get the coordinates x and y set again, the correct location might exist as well
		}

		$doneCoordinates .= $coordinates;							//Add the processed coordinates to our buffer

		$newPlacemarks[] = $placemark;								//Add the corrected placemark to the output array
	}

	return $newPlacemarks;
}

add_filter( 'bgmp_get-map-placemarks-return', 'addBGMPOffsetOnDuplicates' );

While it works, it still leaves a lot to be desired, but I can’t seem to get it working with array_search or something similar. So now quick and dirty.

Also I noticed if I have a - in my placemark title it gets replaced with & #8211;. This happened since I added my functions, but it might also be a result of installing version 1.10 of the BGMP addon (used to work with 1.9rc).

Happy Easter!