Map services are maps made available to the web using ArcGIS. A map is created in ArcMap and published as a service to an ArcGIS Server site. Internet or Intranet users can then use the map service in web applications, ArcGIS for Desktop, ArcGIS Online, and other client applications.
To access the individual feature layers within a map service, the layer id must be referenced and added to the ArcGIS Online web map. For example, https://apps.fs.usda.gov/arcx/rest/services/EDW/EDW_RightofWay_01/MapServer/0 will add the EDW Right of Way feature layer to your web map.
For a more in-depth walkthrough of how to use EDW Map Services, please refer to the following guide: How to Use Map Services
How to see whether certain data layers are available for a specific forest:
Some data is published on a forest by forest basis. The instructions in this PDF document will tell you how to determine whether certain data layers are available for a specific forest.
The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly.