Querying posts by latitude and longitude to build a Google Maps with several markers

Question

I have 4 different post types and 4 differey taxonomies Each term for each taxonomy stores a marker (url to a png icon). Each post has coordinates attached with Advanced Custom Fields and I'll probably use Geo Data Store to optimise scalability.

• a) how would you ideally query for the posts which fall under a specified km radius by lat and lng with Wordpress? I'd like to avoid, if possible, direct db queries.

• b) I'm going to store coordinates in a different table with Geo Data Store. But how about markers? Is it a good idea to store the icon/marker url of each term in a meta field for these terms?

• c) in general, what do you think would be the best practice to approach the project outlined above? I'd like to avoid to use further plugins (except for ACF)

Thanks in advance for all your advices.

Answer 1

To connect your meta fields with the "Geo Data Store"-Plugin, you simply take the name of the meta key/field and map it with the filter to the plugin.

add_filter( 'sc_geodatastore_meta_keys', 'wpse82502_lat_lng_metakey_mapping' );
function wpse82502_lat_lng_metakey_mapping( $keys )
{
    $keys[] = "your_meta_key_field_name";
    return $keys;
}

To get the data from PHP to JS, simply use wp_localize_script().