NOAA Coastal Services Center

Digital Coast

Tools

Nonpoint-Source Pollution and Erosion Comparison Tool

Provided by the NOAA Coastal Services Center

N-SPECT for ArcGIS 9.3

Download Now

  • Version 1.5.1
  • Release date: August 2009
  • Compatible with ArcGIS 9.3
N-SPECT for ArcGIS 9.2

Download Now

  • Version 1.5.0
  • Release date: September 2008
  • Compatible with ArcGIS 9.2
  • The installation packages include support documentation and test data from Hawai'i.
  • Significant changes:
    • The User's Manual and Technical Guide were updated.
    • Curve number and pollutant coefficient tables were revised and expanded to include the full C-CAP classification scheme.
    • The Erosion function was expanded to allow users to enter a sediment delivery ratio (SDR) grid developed using independent techniques.
    • The Watershed Delineation function was expanded to allow users to input digital elevation model (DEM) derivatives developed using independent techniques.
Opt-In Subscription Information Form

To receive updates and announcements

Previous Versions

N-SPECT v1.1.3 (zip file, 37.5 MB)

  • Release date: May 2007
  • Compatible with ArcGIS 9.2

N-SPECT v1.1.2 (zip file, 41.2 MB)

  • Release date: March 2006
  • Compatible with ArcGIS 9.0 or 9.1

N-SPECT v1.0.1 (zip file, 36.8 MB)

  • Release date: January 2005
  • Compatible with ArcGIS 8.3