NJDEP 1986 Land Use/Land Cover for Atlantic County, New Jersey

Citation:

Citation Information:

Originator: New Jersey Department of Environmental Protection (NJDEP), Office of Information Resources Management (OIRM), Bureau of Geographic Information and Analysis (BGIA)
Publication Date: 19981101
Title: NJDEP 1986 Land Use/Land Cover for Atlantic County, New Jersey
Edition: 1986
Geospatial Data Presentation Form: vector digital data
Publication Information:

Publication Place: Trenton, NJ
Publisher: New Jersey Department of Environmental Protection (NJDEP), Office of Information Resources Management (OIRM), Bureau of Geographic Information and Analysis (BGIA)

Online Linkage: http://www.state.nj.us/dep/gis/digidownload/zips/lulc/atllulc.zip

Description:

Abstract:
This data was created by combining two separate data sets, the land use/land cover layer from the Integrated Terrain Unit Maps (ITUM) for this county and the freshwater wetlands (FWW) layer generated under the New Jersey Freshwater Wetlands Mapping Program. The Arc/INFO LULC coverage has been converted to an ArcView shapefile for distribution.
The ITUM land use/land cover was photo interpreted from 1986 color infrared (CIR) 1:58000 aerial photos, and delineated using a modified Anderson et al. 1976, classification system to 1:24000 rectified photo-basemaps. These basemaps complied with National Map Accuracy Standards (NMAS) as individual quadrangles but were not produced from a sophisticated aero-triangulation photogrammetric solution. Minimum mapping unit = 2.5 acres. The ITUM land use/land cover was integrated with three other sources (soils, USGS floodprone areas, and 1906 Atlas Sheet Geology) based on coincident features. The four data layers have subsequently been split out into four separate themes for distribution and use. Beginning in 1998, the NJDEP does not support the data as a single integrated ITUM theme but rather as four separate themes.

Freshwater wetlands delineations were made on 1986 orthophoto quarterquad basemaps (1:12000) by photo interpretation of 1986 CIR photos. The classification system used was a modified Cowardin system (Cowardin, et al., 1979). All freshwater wetland polygons greater than 1 acre in area and all linear freshwater wetland features greater than 10 feet in width were mapped. The 1986 quarterquad basemaps meet NMAS and are orthophotos.

Purpose:
The ITUM land use/land cover information was developed as an element of the NJDEP Integrated Terrain Unit Mapping (ITUM). This theme was developed as one of the fundamental data sets needed for environmental analysis and GIS mapping based on a department wide needs assessment.
The FWW theme was mapped to fulfill a requirement of the Freshwater Wetlands Act of 1987 (Refer to metadata for FWW). The FWW data was subsequently integrated into the existing ITUM land use/land cover to produce the LULC theme.

Tidal (estuarine) wetlands were not mapped as part of NJDEP's FWW mapping. These polygons were delineated as part of the ITUM land use/land cover mapping.

LULC polygons are intended to serve as a resource for analysis rather than regulatory delineations. The NJDEP may change the linework based on more in depth analysis and field inspection for regulatory purposes.

Supplemental Information:
The ITUM land use/land cover theme and the FWW theme were mapped as independent projects for different purposes. From early on, the NJDEP planned to integrate the two layers even though the standard for FWW mapping was much tighter. The integration of these two data layers was completed in 1997. The specific process used to perform the integration of the ITUM land use/land cover theme and the FWW theme into the LULC theme is discussed in more detail in the METHODS.TXT file. A brief description follows:

The ITUM land use/land cover layer served as the base layer because it represented a more complete data layer since all areas within the state were mapped. The FWW theme was used to add detail to the ITUM theme because the FWW was produced at a larger mapping scale with extensive fieldwork and with smaller minimum polygon size. Therefore the detailed non-tidal wetland FWW delineations were integrated in their entirety into the ITUM land use/land cover layer for each county, and the original non-tidal ITUM wetland delineations were eliminated. The resultant theme is the LULC.

All of the detail of the polygon FWW maps, both in the linework (polygons), and coding (Cowardin classification) has been retained in the LULC product. (The single line freshwater wetland features are not included in this integration). However, since the ITUM land use/land cover layer was classified according to the modified Anderson et al. (1976) classification system, the wetland FWW polygons have been given a more general Anderson (4 digit) classification code in the LULC theme. If needed, the LULC freshwater wetland polygons can be interpreted at a level of detail similar to the surrounding non-wetland areas.

The integration process does create some special problems in the final data layer. The most notable problem is that sliver polygons are created. Slivers under .25 acres have generally been eliminated since these are, in most cases, results of the processing and not real features of either original data layer. Possible slivers over .25 acres, however, have been left in the final themes. While many of these should be merged into adjacent polygons, others are real features that are correctly classified. Most sliver polygons need to be analyzed on a case by case basis before it is determined whether or not they should be eliminated, re-coded or retained. As the LULC theme is updated, sliver polygon problems will be investigated and corrected. The overall aerial extent of the slivers should not greatly alter the use of these data if they are not analyzed individually.

The Anderson et al. 1976 (modified 1999) classification system is a hierarchical system based on four digits. The four digits represent three levels of classification: Level I, general; Level II, descriptive; and Level III, detailed. Therefore the first digit in the code is the Level I general classification. The first two digits reveal the Level II descriptive code and the four digits represent the detailed Level III code. The LULC theme is generally a Level II classification but some level III detail is included.

For example the code 1110 represents:

1---Urban
11--Urban, Residential
1110--Urban, Residential, High Density or Multiple Dwelling

This file is included in the downloadable zip file and once unzipped can be accessed through ArcView. In ArcView, after the LULC shapefile has been added to a view, make the LULC theme active and double click on it to open the legend editor. Select Load, which opens the load legend. Locate the unzipped landuse.avl file, select it, and click OK. When the load legend prompts for Field selection, chose Leveli and click OK. This will change the Values Field in the legend editor to Leveli and assign standard colors to the label attributes. Click Apply to implement these changes. The landuse.avl file included with each county's LULC shape file is the same, so if downloading multiple county LULC files, only one copy of landuse.avl needs to be saved.

ANDERSON.TXT Land use / land cover 4-digit code descriptions in text format

ANDERSON.DOC Land use / land cover 4-digit code descriptions in Word 6.0 format

FWW.TXT Wetlands Cowardin alpha-numeric classification system in text format

FWW.DOC Wetlands Cowardin alpha-numeric classification system in Word 6.0 format

METHODS.TXT Procedures used for combining Integrated Terrain Unit Mapping (ITUM) Land Use/Land Cover and NJ Freshwater Wetlands coverages in text format.

METHODS.DOC Procedures used for combining Integrated Terrain Unit Mapping (ITUM) Land Use/Land Cover and NJ Freshwater Wetlands coverages in Word 6.0 format.

ITUM.TXT Detailed description of the ITUM production by county with methods in text format.

ITUM.DOC Detailed description of the ITUM production by county with methods in Word 6.0 format.

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1986
Beginning Time: Unknown
Ending Date: 1986
Ending Time: Unknown

Currentness Reference: ground condition

Status:

Progress: Complete
Maintenance and Update Frequency: 1995/97 Update is currently available (by WMA)

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -74.98672
East Bounding Coordinate: -74.30579
North Bounding Coordinate: 39.72991
South Bounding Coordinate: 39.28766

Keywords:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: LULC
Theme Keyword: land use
Theme Keyword: land cover
Theme Keyword: wetlands
Theme Keyword: Anderson
Theme Keyword: Cowardin
Theme Keyword: NJDEP

Place:

Place Keyword Thesaurus: None
Place Keyword: Atlantic County
Place Keyword: New Jersey

Temporal:

Temporal Keyword Thesaurus: None
Temporal Keyword: 1986

Access Constraints: None
Use Constraints:
Data Distribution Agreement (NJDEP) Agrees to abide by the terms and conditions of the following:
I. Description of Data to be Provided
The data provided herein are distributed subject to the following conditions and restrictions:

Subject Data Layers

For all data contained herein, (NJDEP) makes no representations of any kind, including, but not limited to, the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. NJDEP assumes no responsibility to maintain them in any manner or form.

II. Terms of Agreement

1. Digital data received from the NJDEP are to be used solely for internal purposes in the conduct of daily affairs.

2. The data are provided, as is, without warranty of any kind and the user is responsible for understanding the accuracy limitations of all digital data layers provided herein, as documented in the accompanying Data Dictionary and Readme files. Any reproduction or manipulation of the above data must ensure that the coordinate reference system remains intact.

3. Digital data received from the NJDEP may not be reproduced or redistributed for use by anyone without first obtaining written permission from the NJDEP. This clause is not intended to restrict distribution of printed mapped information produced from the digital data.

4. Any maps, publications, reports, or other documents produced as a result of this project that utilize NJDEP 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."

5. Users shall require any independent contractor, hired to undertake work that will utilize digital data obtained from the NJDEP, to agree not to use, reproduce, or redistribute NJDEP GIS data for any purpose other than the specified contractual work. All copies of NJDEP GIS data utilized by an independent contractor will be required to be returned to the original user at the close of such contractual work.

Users hereby agree to abide by the use and reproduction conditions specified above and agree to hold any independent contractor to the same terms. By using data provided herein, the user acknowledges that terms and conditions have been read and that the user is bound by these criteria.

Browse Graphic:

Browse Graphic File Name: http://www.state.nj.us/dep/gis/digidownload/images/lulc/atllulc.gif
Browse Graphic File Description: Snapshot image of land use land cover
Browse Graphic File Type: GIF - Graphic Interchange Format

Native Data Set Environment: ArcInfo 7.x converted to ArcView shapefile.

Attribute Accuracy:

Attribute Accuracy Report:
ITUM land use/land cover: Frequencies run to check for invalid codes. Invalid codes corrected. Nodeerrors and labelerrors functions run and corrected. Some field checking was performed. Land use codes containing ##09 require field verification. Refer to ITUM.TXT or ITUM.DOC.
FWW: Some field checking was done on each quarterquad, minimum of four points. Contractor's post-scanning mylar proof sheets, and digital files, were checked by NJDEP staff against original delineation mylars for completeness and accuracy. Line and polygon codes on proof sheets and in digital files were also checked against original delineation mylars. Errors were corrected to achieve 100% coding accuracy.

LULC: Completed LULC layer was checked for valid codes, labelerrors and nodeerrors. Area calculations done on all non-tidal wetlands mapped for the FWW mapping effort to insure inclusion of all FWW polygons and FWW codes in final LULC layer. On line visual comparisons of final integrated LULC layer with original FWW and land use/land cover layers also performed. Polygons below .25 acres generated through the integration process were eliminated.

Logical Consistency Report: Data has not been systematically plotted on mylar and checked to basemap. Nodeerrors, labelerrors and slivers resolved. #9 codes not field checked.
Completeness Report: The project as originally designed was completed for the entire county.
Positional Accuracy:

Horizontal Positional Accuracy:

Horizontal Positional Accuracy Report:
National Map Accuracy Standards (NMAS) -- Data has been systematically plotted on mylar and checked to 1986 photo basemap. Nodeerrors, labelerrors and slivers larger than .25 acres were resolved (see Section 1.2.3 SUPPLEMENTAL INFORMATION). Features are within +/- 80 feet or better from locations on the 1986 photoquads.
Vertical Positional Accuracy:

Vertical Positional Accuracy Report: N/A

Lineage:

Source Information:

Source Citation:

Citation Information:

Originator: USGS
Publication Date: 1986
Title: Photo-Quad
Geospatial Data Presentation Form: vector digital data
Publication Information:

Publication Place: Reston, VA
Publisher: USGS

Other Citation Details:
A mylar manuscript was made for each FEMA map panel. The high velocity V line and road intersections were delineated on the mylar. Tics ids were identified at these intersections on the manuscript and orthophoto. The V line is defined as "Areas of 100 year coastal flood with velocity (wave action)." The manuscript mylars were scanned, vectorized and edited. The unique tics on the orthophoto were digitized and added to the transformation file for each panel. Each panel was then transformed and appended and checked to the photoquads.
Source Scale Denominator: 24000
Type of Source Media: mylar
Source Time Period of Content:

Time Period Information:

Single Date/Time:

Calendar Date: 1986
Time of Day: Unknown

Source Currentness Reference: ground condition

Source Citation Abbreviation: Photo-Quad
Source Contribution: Helped in overlaying data on land use/land cover.

Source Information:

Source Citation:

Citation Information:

Originator: Markhurd Corp.
Publication Date: 1986
Title: Color Infrared Integrated Terrain Unit Maps
Geospatial Data Presentation Form: vector digital data
Other Citation Details: None

Source Scale Denominator: 24000
Type of Source Media: mylar
Source Time Period of Content:

Time Period Information:

Single Date/Time:

Calendar Date: 1986
Time of Day: Unknown

Source Currentness Reference: ground condition

Source Citation Abbreviation: CIR ITUM
Source Contribution: Provided infrared data on the terrain of New Jersey

Process Step:

Process Description:
Land use/land cover interpreted from 1986 JSS CIR (1:58000) photos. Geology recompiled from 1906 (1:63360) Atlas Sheet. Soils recompiled from 1971 SCS Soil Survey. Floodprone areas recompiled from paper USGS flood maps (polys closed by contractor & coded as such).
See Supplemental Information for additional information.

Process Date: 1997

Cloud Cover: 0

Direct Spatial Reference Method: Vector
Point and Vector Object Information:

SDTS Terms Description:

SDTS Point and Vector Object Type: G-polygon

Horizontal Coordinate System Definition:

Planar:

Grid Coordinate System:

Grid Coordinate System Name: State Plane Coordinate System 1983
State Plane Coordinate System:

SPCS Zone Identifier: 2900
Transverse Mercator:

Scale Factor at Central Meridian: 0.999975
Longitude of Central Meridian: -74.3
Latitude of Projection Origin: 38.5
False Easting: 492125.98
False Northing: 0

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:

Abscissa Resolution: 2
Ordinate Resolution: 2

Planar Distance Units: Feet

Geodetic Model:

Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: GRS 80
Semi-major Axis: 0
Denominator of Flattening Ratio: 298.257222101

Detailed Description:

Entity Type:

Entity Type Label: Land Use/Land Cover
Entity Type Definition: Land Use/Land Cover 1986
Entity Type Definition Source: NJDEP

Attribute:

Attribute Label: ACRES
Attribute Definition: Acreage of each land use feature.
Attribute Definition Source: NJDEP
Attribute Domain Values:

Unrepresentable Domain: Unique Domain

Attribute:

Attribute Label: CLASS
Attribute Definition:
Numeric code representing Cowardin alpha-numeric labels for FWW polygons.

Attribute Definition Source: NJDEP
Attribute Domain Values:

Codeset Domain:

Codeset Name: CLASS
Codeset Source: Cowardin

Attribute:

Attribute Label: COWARDIN
Attribute Definition:
Alpha-numeric label defining FWW Types. See attached fww.doc or fww.txt for more details.

Attribute Definition Source: NJDEP
Attribute Domain Values:

Codeset Domain:

Codeset Name: COWARDIN
Codeset Source: Cowardin, L.M., V. Carter, F.C. Golet, and E.T.LaRoe

Attribute:

Attribute Label: LABEL
Attribute Definition: Short description of land use category
Attribute Definition Source: NJDEP
Attribute Domain Values:

Unrepresentable Domain: Unique Domain

Attribute:

Attribute Label: LAND_USE
Attribute Definition: Land use/land cover code (four digit).
Attribute Definition Source: NJDEP
Attribute Domain Values:

Codeset Domain:

Codeset Name: Land use/land cover code
Codeset Source: Anderson et.al

Attribute:

Attribute Label: LEVELI
Attribute Definition: Generalized level 1 land use description (For example, Urban, Forest, Barren).
Attribute Definition Source: NJDEP
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: AGRICULTURE
Enumerated Domain Value Definition: Agricultural land use
Enumerated Domain Value Definition Source: NJDEP

Enumerated Domain:

Enumerated Domain Value: BARREN LAND
Enumerated Domain Value Definition: Barren land use
Enumerated Domain Value Definition Source: NJDEP

Enumerated Domain:

Enumerated Domain Value: FOREST
Enumerated Domain Value Definition: Forested land use
Enumerated Domain Value Definition Source: NJDEP

Enumerated Domain:

Enumerated Domain Value: URBAN
Enumerated Domain Value Definition: Urban land use
Enumerated Domain Value Definition Source: NJDEP

Enumerated Domain:

Enumerated Domain Value: WATER
Enumerated Domain Value Definition: Water covered land use
Enumerated Domain Value Definition Source: NJDEP

Enumerated Domain:

Enumerated Domain Value: WETLANDS
Enumerated Domain Value Definition: Wetland land use
Enumerated Domain Value Definition Source: NJDEP

Attribute:

Attribute Label: LUCODE
Attribute Definition: Numeric code representing LEVELI.
Attribute Definition Source: NJDEP
Attribute Domain Values:

Codeset Domain:

Codeset Name: LUCODE
Codeset Source: Cowardin

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: NJDEP/OIRM/BGIA

Contact Address:

Address Type: mailing and physical address
Address: 401 East State Street, First Floor, PO Box 428
City: Trenton
State or Province: New Jersey
Postal Code: 08625-0428
Country: USA

Contact Voice Telephone: 609-984-2243
Contact Facsimile Telephone: 609-292-7900
Contact Instructions: Call 609-984-2243 with questions concerning only the acquisition/download of this data set. Call the metadata reference contact with questions concerning the data.

Resource Description: 1986 Land Use/Land Cover
Distribution Liability: See""Use Constraints"
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: AVSHP
Format Version Number: 7.x

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: http://www.state.nj.us/dep/gis/lulcshp.html

Digital Transfer Option:

Offline Option:

Offline Media: None
Recording Format: None

Fees: Free download
Ordering Instructions: Via Download

Metadata Date: 1/15/1999
Metadata Review Date:
Metadata Future Review Date:
Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: John Tyrawski
Contact Organization: New Jersey Department of Environmental Protection, Bureau of Geographic Information and Analysis

Contact Position: Reasearch Scientist
Contact Address:

Address Type: mailing and physical address
Address: 401 East State Street, Box 428
City: Trenton
State or Province: New Jersey
Postal Code: 08625
Country: USA

Contact Voice Telephone: (609) 777-0151
Contact Electronic Mail Address: John.Tyrawski@dep.state.nj.us

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998