Common, but non-editable, data layers in Intterra vary from customer to customer.  That being said, a fair sampling of typical national data is listed here (along with a brief description).

NOTE: RAWS (WFAS) and National Predictive Services Group (NPSG) layers are not currently available form the source. Here is a link for Layer Status.  Also see Basemaps available in Intterra

Layer Name
Description
Source
Update Frequency
Active Incidents (IRWIN)
Displays the current locations of all active fires.
Integrated Reporting of Wildland-Fire Information (IRWIN)
Every 30 Minutes
Briefing Tool
Combines data added in the system via Operations Incidents and data from Irwin.
Multiple
When edited
Digital Vertical Obstructions
Displays vertical obstructions that are pertinent to aviation operations.
Fire Aviation Management EGP
Bi-Annually (or pending updates)
EJScreen Demographics
Demographic information to identify vulnerable population based on minority, low-income, age, education, and linguistic isolation. Demographic Index  - Is an average of  % minority and % low-income.
EPA
Annually
FAA Aeronautical Charts
Displays aeronautical charts that assist with aviation operations, includes Charts, Boundaries, and Footprints.
ChartsBundle
Bi-Annually (or pending updates)
GACC Boundaries/Regions
Displays the boundaries of the 7 GACC regions
Fire Aviation Management EGP
Annually (or pending updates)
Historical Fire Data
Displays fire perimeters of previous year's fires
USGS
Annually (or pending updates)
IgPoint/Haweye
Space borne sensor that displays thermal and cloud cover data.
USFS RSAC
Every 30 minutes
Lightning
Displays lightning strikes and densities. BLM Lightning services displayed by elapsed time and positive/negative polarity.
Fire Aviation Management EGP/BLM
Every 2 minutes
Military Training Routes
Displays the navigational routes of military training flight operations.
Fire & Aviation Management EGP
Annually (or pending updates)
MODIS/VIIRS Detection
Spaceborne sensors used to scan the Earth’s surface for fires.  Three satellites pass over a location each day and night.
USFS RSAC
Every 30 Minutes
Hawkeye Thermal IR Detects
Compiles information from multiple sources and assesses the consolidated input for indications of a wildland fire and provides near real-time wildland fire alerts to federal, state, and local wildland fire agencies via the US Forest Service (USFS)
Fire Aviation Management EGP
Every 5 Minutes above threshold
Interagency Fuels Treatements
Integrated Interagency Fuels Treatements from USFS and DOI.
Fire Aviation Management EGP
Annually (or pending updates)
National Fire Guard Detections
Wildfire detection and monitoring for areas of heat (not fire perimeters). Relies on a program called Firefly to provide FireGuard analysts with a set of wildfire monitoring capabilities from multiple data sources. More info - Firestare Info Sheet NATIONAL v3 FINAL.pdf
Fire & Aviation Management EGP, DOD and States
Varies, as often as 15 minutes
National Fire History
Perimeters of prior fires.
Wildland Fire Decision Support System (WFDSS)
Annually (or pending updates)
National Incident Feature Service (NIFS)
Shared near-real time incident mapping. The 'Approved' version is the same as displayed in the EGP and includes only features that have been approved and set of cooperator or public sharing.
Fire Aviation Management EGP
When edits occur
NowCoast NEXRAD Radar
Next generation RADAR (wsr-88d) displays precipitation and wind.
nowCOAST™ map service, NOAA
The radar scan times 4.5, 5, 6 or 10 minutes.
NIROPS Scanner Requests
Polygons showing areas for which infrared imagery has been requested from National Infrared Operations.
National Predictive Services Group (NPSG)
Every 60 minutes
NowCoast Precip Forecast
Amount of precipitation forecast to occur at a location within a specified 6-hour time period.
nowCOAST™ map service, NOAA
From minutes to once per day
NowCoast Rainfall Estimates
Radar-only based quantitative precipitation analyses for 1, 3, 6, 12, 24, 48, 72-hour time periods
nowCOAST™ map service, NOAA
From minutes to once per day
NowCoast SurfaceObs
Latest surface weather and marine weather observations at observing sites
nowCOAST™ map service, NOAA
Update frequency varies
PLSS Reference Grid
Public Land Survey System (PLSS).
BLM/USFS
Annually (or pending updates)
Public Fire Perimeters
Daily Fire Perimeters approved for public viewing from the National Incident Feature Service.
Fire & Aviation Management EGP
When edits occur
RAWS (WIMS)
Remote Automated Weather Station data - current and forecasted.
United States Forest Service, Wildland Fire Assessment System (WFAS)
Every 10 minutes
Residential Areas
Called 'Where People Live' in source data, it represents housing density per 30 sq meters recoded into 7 classes. This dataset is derived from the LandScan 2009 night population count data and is based on the number of housing units per acre. The WPL dataset is intended for regional and state planning purposes. Not all areas of homes are represented. Vacation homes account for the most missing data. Use better state and local data if available.
West Wide Risk Assessment (WWRA)
n/a
Retardant Avoidance Areas
Aerial fire retardant avoidance areas for the potential of impacts to threatened, endangered or Forest Service sensitive species.
USDA Geodata
Annually (or pending updates)
Retardant Avoidance Hydro
Aerial fire retardant avoidance areas for hydrographic features.
USDA Geodata
Annually (or pending updates)
Sage Grouse
Displays greater sage grouse current occupied range and habitat management areas.
Fire Aviation Management EGP, BLM NIFC
Annually (or pending updates)
Special Use Air Space
Displays the air space reserved for special operations.
Fire Aviation Management EGP
Annually (or pending updates)
Temporary Flight Restrictions
Areas where flight operations are restricted.
Fire Aviation Management EGP
Every 15 minutes
Traffic
Traffic conditions you can expect for the present time
ArcGIS Online
Every 5 minutes
USNG Reference Grid
US standard nationally consistent grid reference system
NGA HSIP
Annually (or pending updates)
Water Vapor (NowCoast)
GOES map layer displays water vapor imagery from the NOAA
nowCOAST™ map service, NOAA
Every 30 minutes
Wind Velocity (NowCoast)
Past 4 hours of surface meteorological analyses of wind velocity
nowCOAST™ map service, NOAA
Every 6 hours
Wx Watches Warnings
Watches, warnings and advisories for the U.S.
National Weather Service (NOAA)
When issued