eRAMS Base Layers
Base Layers are user selected representations of the land surface that can be viewed at multiple scales. Base layers form the foundation of a map and can be selected or deselected by clicking on the radio button next to each layer.
Base layers cannot be user modified and only one basemap can be selected at any time.
Below you will find a description for each type of Base Layer available using the eRAMS GIS/Analysis interface.
Working with Base Layers
Open Street Map
The Open Street Map base layer contains information created by a community of mappers to provide open access to geospatial data across the globe.
Source Link: https://www.openstreetmap.org
Google Physical
A physical map from Google showing terrain features such as mountains, and other political features such as roads and cities.
Source Link: https://developers.google.com/maps/documentation/javascript/maptypes
Google Streets
A road map from Google with some physical features.
Source Link: https://developers.google.com/maps/documentation/javascript/maptypes
Google Hybrid
A hybrid map from Google displaying traditional road map and satellite view features.
Source Link: https://developers.google.com/maps/documentation/javascript/maptypes
Google Satellite
A map of the land surface created from Google Earth satellite images.
Source Link: https://developers.google.com/maps/documentation/javascript/maptypes
Bing Road
A road map from Microsoft incorporating terrain and physical features.
Source Link: https://www.microsoft.com/en-us/maps/documentation
Bing Hybrid
A hybrid map from Microsoft displaying road map and satellite view features.
Source Link: https://www.microsoft.com/en-us/maps/documentation
Bing Aerial
A satellite imagery map from Microsoft.
Source Link: https://www.microsoft.com/en-us/maps/documentation
USGS Topo
An orthoimagery basemap from the United States Geological Survey with topographic details added such as elevation contours and labeling of physical map features.
Source Link: https://nationalmap.gov/
USGS Imagery Topo
An orthoimagery basemap from the United States Geological Survey with topographic details added such as elevation contours and labeling of physical map features.
Source Link: https://nationalmap.gov/
USGS Hydro-NHD
A hydrology-focused map created from the National Hydrography Dataset (NHD) by the United States Geological Survey.
Source Link: https://nationalmap.gov/
USGS Shaded Relief
A neutral-toned shaded terrain relief map from the United States Geological Survey.
Source Link: https://nationalmap.gov/
None
Select the None base layer when you want a blank canvas for creating your map.