ForWarn

Satellite-Based Change Recognition and Tracking

Data Access

ForWarn data are readily accessed through the project’s Forest Change Assessment Viewer using a standard internet browser. To learn more about the functions and features of the Assessment Viewer, please read the Forest Change Assessment Viewer Users Guide

Web Map Service (WMS) Access

WMS allows access to the ForWarn vegetation change images using your desktop GIS or mobile mapping application software. The advantages of viewing the forest change images locally are: (1) to overlay with your GIS layers, (2) to screen-digitize disturbance extent and severity, (3) the increased use and functionality of a desktop GIS, and (4) to view the change images via mobile devices (such as using OruxMaps with Droid-based handhelds). Use the following WMS connection strings to access the ForWarn data products:

WMS Dataset Contents Connection URL
1-year baseline change images 01/08/2006 to present, includes 1yr change images by NDVI max and 1yr change by 'Adaptive Length Compositing (alc)' for the "Early Detect" change product (also located here) - the current image (by max) [GetCapabilities]
- the current image (by alc) [GetCapabilities]
- 2006 to present directory [GetCapabilities]
3-year baseline change images Begins 01/08/2006 through current for 3-year baseline only http://wms.forwarn.forestthreats.org/ews3year [GetCapabilities]
5-year baseline change images Begins 01/08/2006 through current for 5-year baseline only http://wms.forwarn.forestthreats.org/ews5year [GetCapabilities]
All-Year baseline
change images
(Web Mercator)
01/08/2006 to present, All-year change products using NDVI max, mean of the NDVI max and by phenological mean By NDVI max
- the current image [GetCapabilities]
- 2006 to present [GetCapabilities]
By mean of NDVI max
- the current image [GetCapabilities]
- 2006 to present [GetCapabilities]
By phenological mean
- the current image [GetCapabilities]
- 2006 to present [GetCapabilities]
MODIS Cloud Product 01/08/2006 through present, True Color Composites (500m) for each date of change image http://wms.forwarn.forestthreats.org/truecolor [GetCapabilities]
Boundaries States, Counties, Federal Lands http://wms.forwarn.forestthreats.org/boundaries [GetCapabilities]
Vector Layers Interstates, Urban Density Zones http://wms.forwarn.forestthreats.org/vlayers [GetCapabilities]
ADS Insect and Disease Surveys http://wms.forwarn.forestthreats.org/ads [GetCapabilities]
Treatments USFS Fuels Treatments and Logging Activity http://wms.forwarn.forestthreats.org/treatments [GetCapabilities]
Wildfire MODIS Cumulative Fire Detections and Large Fire Incidents http://wms.forwarn.forestthreats.org/fire [GetCapabilities]
NDVI MODIS NDVI (22 images / yr, 2003-2009) http://wms.forwarn.forestthreats.org/modisndvi [GetCapabilities]
Phenological Parameters* National Phenology Dataset, 2000-2014 http://wms.forwarn.forestthreats.org/parameters [GetCapabilities]
Phenological Regions* Phenological Regions 50-5000 http://wms.forwarn.forestthreats.org/phenoregions [GetCapabilities]
Cumulative Integrals* National Phenology Dataset, (22) 16-day images / yr, 2003-2009), not current http://wms.forwarn.forestthreats.org/integrals [GetCapabilities]
Raster Layers Evergreen/Deciduous Thrive and Decline, GAP veg., Forest types and groups, Avg. Precip, Avg. Temp, Biomass, Landcover http://wms.forwarn.forestthreats.org/rlayers [GetCapabilities]
W-Layers TRMM, USGS WaterWatch http://wms.forwarn.forestthreats.org/wlayers [GetCapabilities]

(*) see Phenology Products Listing

Web Coverage Service (WCS) Download*

WCS allows users with desktop mapping applications the ability to download GIS-ready vegetation change image products. The benefit of downloading the change images allows one the ability to spatially analyze the vegetation change images’ raster values by themselves or with other GIS data layers. The raster values of the change images are percent NDVI departure from a respective baseline time period. Use the following WCS connection string to access the ForWarn data products:

WCS Dataset Contents Connection URL (ArcGIS users denote version 1.0.0)
1-year baseline
change images
01/08/2006 to present  image http://wms.forwarn.forestthreats.org/ewswcs1year? [GetCapabilities]
3-year baseline
change images
01/08/2006 to present; includes RSAC FHTET imagery with “bd.tif” denoted in the filename (EFETAC does not provide support for the RSAC FHTET products) http://wms.forwarn.forestthreats.org/ewswcs3year? [GetCapabilities]
All-year baseline
change images
01/08/2006 to present; contains the “current”, “previous1” and “previous2” images in all three baseline periods; includes RSAC FHTET imagery with “bd.tif” denoted in the filename (EFETAC does not provide support for the RSAC FHTET products) http://wms.forwarn.forestthreats.org/ewswcs? [GetCapabilities]

(*) ArcGIS-specific Issues:1. Software Version and Service Packs

    a. There have been issues reported of being unable to export ForWarn change images via the WCS using ArcGIS 10 SP2-4.a. If you experience alignment issues, you may need to define the incoming projection by changing the datum to “D_Sphere_ARCINFO.”
    b. ArcGIS Desktop is not currently supported for retreival via WCS, suggest use of QGIS (see downloading via WCS document below)

Important Files

Right click and select "Save Target As..." to download.