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Data Downloads

 

The vision presented by Garden State Greenways wouldn’t be possible without the use of computerized mapping technologies collectively known as geographic information systems (GIS). GIS allow for the integration and analysis of many different types and sources of geographic information, such as soil types, land uses and aquifer recharge zones. The data layers available for download on this page are intended for people with access to GIS software that can view ESRI shapefiles. If you don’t have access to any GIS software you have three choices: you can view the data on our interactive map server, you can download our prepared county maps, or you can download ArcReader, a free GIS data viewer from ESRI, and then download the GSG data.

Anyone wishing to make use of the data should familiarize themselves with the process used to create the hubs and corridors that are central to the Garden State Greenways concept. A brief summary of the process is available, as is a complete and technical description of the methodology (PDF, 2.2 MB).

Limitations:
As with any GIS product, the Garden State Greenways GIS data is subject to temporal, positional and attribute accuracy limitations. Many data layers have been used to create the GSG data, and each of these has their own limitations. For example, developed areas in the land use data used is current to the year 2000, while endangered species scores for hubs is current as of 2002. For more information on the data layers involved in the creation of the GSG data, please review the metadata documents. The New Jersey Conservation Foundation, the New Jersey Department of Environmental Protection and all other providers of the data used in the Garden State Greenways process make no guarantees about the accuracy of the data and provide all data “as is”.

Data:
The following GSG GIS data is available for download in ESRI shapefile format, zipped. The data is projected to NJ State Plane, NAD 83 Feet. Four different hub data sets are available, each based on a slightly different land cover classification as explained below. Each hub has number of attributes associated with it.

  • All land cover classes (zip file, 14.6 MB)- The most detailed, classifying hubs as upland forest, forested wetlands, emergent wetlands and agriculture/grassland.
  • Combined forests (zip file, 7.8 MB) - This data sets combines upland forests and forested wetlands into a single forest land cover class.
  • Combined wetlands (zip file, 13.0 MB)- This data set combines forested wetlands and emergent wetlands into a single wetlands land cover class.
  • Natural/agricultural (zip file, 5.7 MB) - This data set combines upland forest, forested wetlands and emergent wetlands into a single natural lands land cover class.
  • Connectors (zip file, 9.8 MB) - This data set contains connectors between important hubs. These connectors are orginally generated as lines by least cost path and shortest distance analysis, then buffered so they are 1/4 mile wide.

An ArcView 3.x based planning tool that allow users to quickly rank and idenitfy priorty hubs is available here.

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