Map-based criteria

To draw a polygon select the Draw polygon icon on the left-hand side of the map:

Once selected, start clicking on the map to define the edges of a polygon, clicking on the first point again finishes the polygon. To find the data within a polygon, click the Query button (shortcut ctrl+enter). Sites that are included in the results are highlighted in blue:

You can see in the above example, a number of sites are outside of the defined region. It is possible to edit an existing polygon to adjust the results by clicking on the Edit polygon button icon.

Shapefile polygons

You can add zipped shapefiles to automatically create polygon criteria in Discover. Either add the zipped shapefile via the Upload zipped shapefile button or simply drag and drop the file onto Discover.

Country-based Polygons

Available via the " Add a country polygon button (flag icon) on the map toolbar, predefined polygons representing the land borders of countries can be selected.

Country-based polygons are a useful way of selecting data spatially, especially when location metadata may not have been fully populated. Country-based polygons should not be edited once drawn.

The map tool also allows you to draw multiple polygons, for each polygon you draw a corresponding expression element is added to your query.