| Data Source | Layer Name | Description |
|---|---|---|
| ZedX Inc. | Growing Degree Days 50 | Monthly growing degree day maps (April-October) were generated using the simple arithmetic method: (max. temp. + min. temp.) /2 – 50. Negative values are set to 0. The maps represent average values for the month or season, using data for the thirty-year (1980-2009) period. Values were computed for each day of the month then the daily values were summed to create monthly ones. Units: degrees F. Seasonal GDD 50 is computed by adding the monthly maps together. |
| ZedX Inc. | Length of Growing Season | The length of the growing season is defined as the time in days between the last occurrence of 32F temperatures in spring and the first occurrence of 32F temperatures in fall. These maps represent the average number of days of this period. Data for the thirty-year (1980-2009) period were used to make these maps. Units: days. |
| ZedX Inc. | Frequency of –5F or Lower Temperatures | These maps represent the average number of days per year of minimum temperatures reaching -5F or lower. Please note that in much of the state, occurrence of –5F temperatures is relatively rare, particularly in the south where this event may happen once every two or three years. Data for the thirty-year (1980-2009) period were used to make these maps. |
| ZedX Inc. | Frequency of 90F or Greater Temperatures | These maps represent the average number of days per year of maximum temperatures reaching 90F or higher. Data for the thirty-year (1980-2009) period were used to make these maps. |
| ZedX Inc. | Date of First Fall Frost | These maps represent the average date of occurrence of the first occurrence of 32F temperatures in the fall. Data for the thirty-year (1980-2009) period were used to make these maps. |
| ZedX Inc. | Date of Last Spring Frost | These maps represent the average date of occurrence of the last occurrence of 32F temperatures in the spring. Data for the thirty-year (1980-2009) period were used to make these-maps. |
| ZedX inc. | Average Monthly Precipitation | These maps represent the average rainfall for a month (or summed for multiple months) based on data for the thirty-year (1980-2009) period. Units inches/month. |
| NJDEP | Landuse LandCover (2007) | the 2007 data were produced by visually interpreting color infrared photography. Through this process, photo-interpreters examine each image, and based on their knowledge of photo signatures, classify the image into various land use/land cover categories. The classifications are converted into a land use/land cover GIS digital file, with each delineated polygon representing a distinct land use/land cover type. Only land cover broadly classified as agricultural is used in the wine grape suitability models. |
| NJDEP | Elevation | A lattice i the ESRI GRID raster file generated from USGS DEM files. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard DEM consists of a regular array of elevations cast on a designated coordinate projection system. 7.5-minute DEM (10-meter x 10-meter data spacing, cast on Universal Transverse Mercator (UTM) projection) were merged and clipped to the watershed boundary for this data set. Slope and aspect layers are derived from this. |
| NJGS | Aquifers and Confining Units | Aquifers in New Jersey are ranked on their ability to yield ground water to high-capacity wells. These wells include water-supply, irrigation, and industrial-supply wells sited and tested for maximum yield. For detailed description visit the NJGS web site. |
| NRCS/Rowan University | Soils | These new SSURGO soils layers were developed by the Natural Resources Conservation Service (NRCS), of the US Department of Agriculture, as part of the National Cooperative Soil Survey. The data are from the Soil Survey Geographic (SSURGO) database developed and maintained by the NRCS. Collaborators at Rowan University compiled and merged the soils data into a statewide coverage for this study. |
| Legal statement and disclaimer: | The wine grape maps and the interactive mapping tool are based on data from a variety of sources including the New Jersey Department of Environmental Protection, The Natural Resources Conservation Services, The New Jersey Geological Survey, and ZedX, Inc. Due to the update intervals, interpolation methods, and resolution of the various data sets, the maps produced are suited for general information only. Site-specific assessments should be considered preliminary, and must be complemented by detailed on-site assessments. By using the maps and mapping tool on this site, you are agreeing that you understand these limitations. |