Base Map from Server
To download a base map from an online web server, click one of the following commands to open the Download Online Maps dialog. Use the Download Online Maps dialog to select the server, map extents, and image resolution. To open the Download Online Maps dialog, click the Home | New Map | Base | 
Base from Server command, the Home | Add to Map | Layer | Base from Server command, or the Map Tools | Add to Map | Layer | Base from Server command
When using the Download Online Maps dialog, a server with appropriate data must be selected. Surfer currently supports five types of servers, web mapping service (WMS), Open Street Map (OSM), web coverage service (WCS), web feature service (WFS), and XYZ Tile service (XYZ). WMS, OSM, WCS, WFS, and XYZ servers provide different types of data. Predefined servers in Surfer currently only include WMS servers.
- When selecting a WMS, OSM, or XYZ server, an image is downloaded to be used as a base (raster) layer.
- When selecting a WCS server, data values are downloaded to be used as a grid file. WCS servers cannot be used with the Base from Server command. Use the Grid from Server command or the Download button in the Open Grid dialog instead.
- When selecting a WFS server, vector data is downloaded with points, polylines, and/or polygons representing features in a base (vector) layer.