• Hawth's Analysis Tools For Arcgis For Mac Download
• Hawth's Analysis Tools For Arcgis For Mac Mac
• Arcgis Spatial Analysis

Developing a Watershed Inventory for Vulnerability Assessment Using ArcGIS Continued. A number of data sources were combined to produce a detailed picture of the land uses and landscapes within the watershed. The 2001 National Land Cover Database, a consistent land-cover database for the entire continental United States at a 30-meter resolution, was downloaded from the Seamless Data Distribution System, National Center for Earth Resources Observation and Science (EROS) Web site.

In addition, the National Land Cover Database provides tree canopy and impervious surface data at the same resolution. For Pennsylvania, higher resolution impervious surface data was estimated by Dr. Toby Carlson of Penn State University. Available for 1985 and 2000, it shows changes in impervious surfaces within a watershed. DVRPC made available digital land-use data interpreted from high-resolution digital orthophotography.

Data from 1990, 1995, and 2000 allows an assessment of land-use patterns and land-use change. Although few areas of the country currently have available consistently interpreted, high-resolution land-use data from more than a single time period, more of this data is becoming available. ArcGIS tools, combined with high-quality land-use and land-cover data from multiple sources allow for a detailed assessment of landscape patterns. For example, forests play an important role in both species habitat and water quality. Detailed measures of forest fragmentation can be used to assess ecosystem threats and prioritize land conservation strategies. Using an ArcGIS extension written by Kurt Paulsen of Temple University and Jianye Chen of Rutgers University, a number of measures of forest fragmentation were calculated for each subbasin.

Hawth's Analysis Tools For Arcgis For Mac Download

Hawth's Analysis Tools for ArcGIS were used to calculate distances between forest patches and the proximity of forested patches to streams.

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Hawth's Analysis Tools For Arcgis For Mac Mac

Arcgis Spatial Analysis

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