Configuring the WMS Top Layer

The WMS "top layer" is a virtual layer that contains all the other layers. Express Server supports the inclusion of an optional top layer title, advertised coordinate reference systems (listed as EPSG codes), keywords and contact information for the service.

For more detailed information about each of the WMS properties see version 1.1.1 of the Web Map Service Implementation Specification.

Setting WMS Top Layer Title and Advertised Projections

EPSG codes added here in Settings will be inherited by individual layers. You can also add EPSG codes individually for any catalog or catalog group on the Catalog and Catalog Group pages. Any per-catalog or per-group setting override these global setting for that catalog or catalog group (see Setting a Catalog's WMS Properties).

To set the WMS top layer title:

1. Open the Express Server Manager (see Accessing the Express Server Manager).
2. Click Settings on the top navigation bar, then select a catalog or catalog group in the list.
3. Select WMS on the left-hand navigation panel.
4. Select the Basic tab in the table, then click Edit at the bottom of your screen.
5. Enter or edit the title for the layer. If no title is entered the catalog name is used.
6. Click Save.
7. If you have no further settings to edit, click Publish.

Remember that clicking Save in the workspace only temporarily saves your changes until you click Publish or Discard. Clicking Publish sends all edits on all the configuration pages to the live Express Server. Clicking Discard overwrites all pages of the workspace with the current live configuration.

To set advertised EPSG codes:

1. Open the Express Server Manager (see Accessing the Express Server Manager).
2. Click Settings on the top navigation bar, then select a catalog or catalog group in the list.
3. Select WMS on the left-hand navigation panel.
4. Select the Basic tab in the table, then click Edit at the bottom of your screen.
5. Edit existing entries or click Add and enter a new one, then click Save.
6. If you have no further settings to edit, click Publish.

Adding and Editing a WMS Top Layer Authority URL

Identifier elements can be used to list ID numbers or labels defined by a particular authority. For example, the Global Change Master Directory (gcmd.gsfc.nasa.gov) defines a DIF_ID label for every dataset. The authority name and explanatory URL are defined in a separate AuthorityURL element, which may be defined once and inherited by subsidiary layers. Identifiers themselves are not inherited.

To add or edit the authority URL:

1. Open the Express Server Manager (see Accessing the Express Server Manager).
2. Click Settings on the top navigation bar.
3. Select WMS Top Layer on the left-hand navigation panel.
4. Select the Authorities tab in the table, then click Edit at the bottom of your screen.
5. Edit existing entries or click Add and enter a new one, then click Save.
6. If you have no further settings to edit, click Publish.