In greenstone 3, if your documents or images have GPS metadata then you can add in a Google maps feature which will plot the documents on the map.

Please see the Image Collection with GPS metadata tutorial for details.

There are a few configuration settings missing from the tutorial (as at July 2017). Here is a summary of steps to follow:

• Add GPS metadata manually to documents, or use EmbeddedMetadataPlugin to extract it automatically from images.
• Add indexes on ex.Latitude, ex.Longitude, ex.LatShort, and ex.LngShort
• Add

  <gsf:option name="mapEnabled" value="true" />

  to the format statements for search, browse and display.

• Add raw to the list for the searchTypes format feature.
• Rebuild the collection.

Older versions of Greenstone 3 may have an out-of-date code for accessing the google maps api. Check the file web/interfaces/default/transform/layouts/header.xsl, and look for

<script src="http://maps.googleapis.com/maps/api/js?

If it looks like

<script src="http://maps.googleapis.com/maps/api/js?sensor=false" type="text/javascript"><xsl:text> </xsl:text></script>

then change it to

<script src="http://maps.googleapis.com/maps/api/js?key=AIzaSyCofVTps3xHfMvIcTMHqYMMxe3xXfkAxnI" type="text/javascript"><xsl:text> </xsl:text></script>

Note this uses a key owned by the Greenstone project. There is a limit to how many requests any one key can have per day, so it may pay to set up your own key, see https://developers.google.com/maps/documentation/javascript/get-api-key.