14 Digit Hydrologic Unit Code Delineations for New Jersey [New Jersey] Full Details

Full Details

Title:

14 Digit Hydrologic Unit Code Delineations for New Jersey [New Jersey]

Description:

The 14-digit hydrologic units (HUC14s) in New Jersey is a revision of the 20110225 version of these units. This version corrects 290 overlapping topology errors which were extremely small and visually undetectable. The 14-digit hydrologic units (HUC14s) in New Jersey is a revision of the 2006 version of these units. This version corrects some boundaries to be consistent with a new hydrography coverage based on 1:2,400 aerial photographs (NJDEP, 2008). It also makes some changes to be more consistent with a new 12-digit hydrologic unit coverage (EPA, 2009). This editing process created 42 new HUC14s, deleted one inland HUC14 and five coastal HUC14s in the Delaware Bay, and changed over 100 boundaries. A report detailing these changes (Hoffman and Pallis, 2009) is available online . For programmatic reasons the 14-digit units are clipped to New Jersey's political boundary. HUC14 hydrologic units were first published by Ellis and Price (1995) and made available as a shape file by the New Jersey Department of Environmental Protection soon afterword. Watershed boundaries were based on elevations and water courses from 1:24,000-scale (7.5-minute) USGS quadrangles. These were revised (NJDEP, 2006) by clipping the unit boundaries to the official NJ state boundary and addition of some additional identification information. Some boundaries were changed at that time to reflect errors found in the original coverage. This product is an interim product and will be replaced once better elevational data are available. It is based on elevational data from quadrangle maps at a scale of 1:24,000. The hydrography is at 1:2,400. Once high-resolution LiDAR data (at 1:2,400 or better) become available for New Jersey the 14-digit hydrologic units will be redrawn and this interim coverage will be replaced. EPA's 12-digit hydrologic system (USEPA, 2009) uses a numbering convention that is not entirely consistent with the 14-digit numbering system. For some HUC14s, the first 12 digits do not match the identification number of the 12-digit hydrologic unit it lies within. These discrepancies will be corrected when the HUC14s are next revised.

Creator:

NJ Dept. of Environmental Protection, (NJDEP), NJ Geological Survey (NJGS)

Provider:

New Jersey Department of Environmental Protection's (NJDEP) Bureau of GIS

Resource Class:

Datasets and Web services

Resource Type:

LiDAR

Temporal Coverage:

Last modified 2024-12-31

Date Issued:

2018-12-17

Place:

New Jersey

Rights:

New Jersey Department of Environmental Protection (NJDEP) Data Distribution Agreement. The data provided herein are distributed subject to the following conditions and restrictions: NJDEP assumes no responsibility to maintain them in any manner or form and disclaims any duty or obligation to either maintain availability of or to update the data. Terms of Agreement 1. All data is provided, as is, without any representation or warranty of any kind, implied, expressed or statutory including, but not limited to, the warranties of non-infringement of third party rights, title, merchantability or fitness for a particular use, freedom from computer virus nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. User is responsible for understanding the accuracy limitations of all digital data layers provided herein, as documented in the accompanying cross-reference files (see SUPPLEMENTAL INFORMATION). Any reproduction or manipulation of the above data must ensure that the coordinate reference system remains intact. 2. Digital data received from the NJDEP may not be reproduced or redistributed without all the metadata provided. 3. Any maps, publications, reports, or other documents produced as a result of this project that utilize this digital data will credit the NJDEP's Geographic Information System (GIS) as the source of the data with the following credit/disclaimer: "This (map/publication/report) was developed using New Jersey Department of Environmental Protection Geographic Information System digital data, but this secondary product has not been verified by NJDEP and is not state-authorized or endorsed." 4. NJDEP makes no warranty that digital data are free of Copyright or Trademark claims or other restrictions or limitations on free use or display. Making a copy of this data may be subject to the copyright of trademark laws.

Access Rights:

Public

Format:

Shapefile

Language:

English

Date Added:

2024-09-27