Minerals Management Service (MM, MS-5220, New Orleans, LA 70123-2394; Lou, 200109, Gulf-Wide Information System, Environmental Sensitivity Index Classification of the Outer Coast, Geographic NAD83, LDWF (2001) [esi_LDWF_2001]: None Louisiana, Minerals Management Service (MMS) 1201 Elmwood Park Blvd., MS-5220, New Orleans, LA 70123-2394, New Orleans, LA.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
| Value | Definition |
|---|---|
| 1B | Exposed, solid man-made structures |
| 2A | Exposed, wave-cut platforms in mud |
| 2B | Exposed scarps and steep slopes in mud |
| 3A | Fine- to medium-grained sand beaches |
| 3B | Scarps and steep slopes in sand |
| 4 | Coarse-grained sand beaches |
| 5 | Mixed sand and shell beaches |
| 6A | Shell beaches |
| 6B | Exposed riprap |
| 7 | Exposed tidal flats |
| 8A | Sheltered scarps in mud |
| 8B | Sheltered, solid man-made structures |
| 8C | Sheltered riprap |
| 8D | Vegetated steeply-sloping bluffs |
| 9A | Sheltered tidal flats |
| 9B | Vegetated low banks (non-wetland) |
| 10A | Salt- and brackish-water marshes (including intermediate marshes) |
| 10B | Freshwater marshes |
| 10C | Swamps (forested wetlands) |
| 10D | Scrub-shrub wetlands (for this layer, this code is used exclusively for mangrove shorelines) |
| Value | Definition |
|---|---|
| S | Shoreline |
| B | Breakwater |
| Value | Definition |
|---|---|
| 2 | Low-altitude overflight field sketches and oblique photography |
| 3 | Digitized from aerial photography (DOQQs) |
| Value | Definition |
|---|---|
| E | Estuarine |
This project was supported by the Minerals Management Service (MMS) 1201 Elmwood Park Blvd., MS-5220, New Orleans, LA 70123-2394. Norman Froomer with MMS coordinated the larger G-WIS project and was particularly supportive during the Louisiana portion of the project. This project was coordinated by Louisiana State University (LSU), Center for Coastal, Energy and Environmental Resources (CCEER) and the Department of Geography and Anthropology, 302 Howe-Russell, Baton Rouge, LA 70803. DeWitt Braud, Dina Sa, Hampton Peele, and Lynda Wayne were key contributors to the project. The majority of natural resources data used to develop the larger LA G-WIS data set were provided by the LDWF. Jim Hanifen coordinated the LDWF effort. The following LDWF personnel (listed alphabetically) were major contributors to the LA G-WIS project: Jan Bowman, Heather Warner Finley, Robert Helm, Noel Kinler, Gary Lester, Greg Linscombe, Mike Olinde, Gary Tilyou, and Bill Vermillion. At Research Planning, Inc. (RPI), Scott Zengel was the Project Manager. Colin Plank and Miles Hayes performed the shoreline classification. Zach Nixon was the GIS Coordinator, Jon Whitlock, and Jennifer Rainman performed data processing, and Kristi Suggs prepared the final metadata. Joanne Halls and William Holton contributed to the conceptual design of the project and participated in the LA G-WIS pilot project, which preceded this final data set.
The G-WIS data are created to support environmental assessments associated with oil and gas exploration, production, and transportation activities in the Gulf of Mexico. The G-WIS data structure is closely related to the Environmental Sensitivity Index (ESI) data structure used by NOAA, USCG, and other agencies for oil spill planning and response purposes. These data therefore support the requirements of the Clean Water Act, with amendments by the Oil Pollution Act of 1990, in the development of response plans for immediate and effective protection of sensitive resources. G-WIS and ESI data are also appropriate for other natural resource management and environmental assessment purposes.
USGS, LOSCO & , 2000, Color Infrared Orthophotography of Louisiana: LOSCO, Baton Rouge, LA.
Ramsey, K. & S. Penland (LSU), Unpublished material, Geomorphological Ranking of the Outer Coast of Louisiana.
USGS, LDWF and NWRC, 1997, Louisiana Coastal Marsh Vegetative Type Map: LDWF and USGS NWRC, Lafayette, LA.
The shoreline ESI classifications were field checked during helicopter overflights conducted in May 2001. The surveys were conducted at elevations of 100-500 feet and slow air speed. All shoreline attributed by photointerpretation was surveyed. A coastal geologist edited the ESI classifications on 1:24,000 scale maps during the overflights. Where appropriate, multiple habitats were assigned for each shoreline segment. In some areas, drastic change in shoreline position occurred between the dates of the 1998 DOQQs and the 2001 field surveys due to erosion or active delta building. These areas included, but were not limited to: 1) The Chandaleur Islands; 2) Several marsh restoration sites in the Isles Derniers and Timbalier Islands; and 3) both the Wax Lake, and Main Atchafalaya Deltas. In some cases, following the field verification, major shoreline changes were sketched on maps in the field and oblique aerial photographs made. The field maps were then scanned and registered and edits were made using on-screen digitizing. Supplemental shoreline segments were digitized from field sketches and oblique aerial photography acquired during the field surveys. The variety of wetland plant communities in coastal Louisiana made it difficult to classify marsh shorelines by ESI marsh type during the field surveys. As such, the 1997 LDWF Marsh Type data were used to update all shoreline segments with the appropriate ESI code, via a GIS overlay operation.
Person who carried out this activity:
(803) 256-7322 (voice)
(803) 254-6445 (FAX)
szengel@researchplanning.com; znixon@researchplanning.com; cplank@researchplanning.com
A multi-stage error checking process is used to verify both attribute accuracy and logical consistency throughout data production. The process includes a standardized data entry methodology, hardcopy data review by in-house and external resource experts, and a final Quality Assurance/ Quality Control (QA/QC) process, as well as multiple automated logical consistency checks.
The shoreline was digitized from the 1998 LOSCO/USGS Digital Orthophoto Quarter Quadrangles (DOQQ), which meet National Map Accuracy Standards at an approximate scale of 1:12,000. The horizontal positional accuracy for the majority of shoreline arcs are likely to be similar to that of the DOQQs. A known problem existed with the registration of the DOQQs representing the northern portion of the Chandaleur Islands. This was fixed with a temporary re-registration to other digital data, but horizontal positional accuracy is likely to have suffered. In some cases, shoreline arcs were digitized from field sketches and oblique aerial photography. The horizontal positional accuracy of these arcs is difficult to quantify, but likely to be far worse than that of the shoreline digitized from DOQQs. The minimum mapping unit (MMU) of the actual shoreline classification segments is estimated at 50 feet. See the lineage and process description sections for more information on the original source data and how these data were integrated or manipulated to create the final data set.
These data represent arcs depicting the Environmental Sensitivity Index (ESI) classification of the outer coast of Louisiana. The outer coast consists of the shoreline of all barrier island arcs from the Chandaleur Islands west, as well as the outer coast of the Mississippi River Delta, the Wax Lake and Main Atchafalaya River Deltas, a portion of the coast of Vermilion Bay, and the Chenier Plain coast from Marsh Island west to Sabine Pass. The shoreline was primarily digitized from the 1998 LOSCO/USGS Digital Orthophoto Quarter Quadrangles (DOQQ) and represents the position of the shoreline on the dates of photography.
A multi-stage error checking process, described in the above attribute accuracy report is used to verify both attribute accuracy and logical consistency throughout data production. This process includes multiple automated logical consistency checks, which test the files for missing or duplicate data, rules for proper coding, and GIS topological consistencies (such as unnecessary nodes, etc.).
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- The G-WIS database was developed to provide summary information on sensitive natural and human-use resources for the purposes of oil spill planning, environmental assessment, and natural resource management. Although the G-WIS database should be a valuable planning and resource management tool, it should not be used to the exclusion of other pertinent data or information held by state or federal agencies or other organizations. Likewise, information contained in the database cannot be used in place of consultations with environmental, natural resource, and cultural resource agencies, or in place of field surveys. Also, this database and related map products should not be used for navigation. Recognize that the information contained in the G-WIS database represents known concentration areas or occurrences of natural, cultural, and human-use resources, but does not necessarily represent the full distribution or range of each species or resource. This is particularly important to recognize when considering potential impacts to protected resources, such as endangered species, wetlands, etc. For more information or guidance on proper and improper uses of these data, please contact the Louisiana Department of Wildlife and Fisheries (LDWF) and Research Planning, Inc. Acknowledgement of the originators, publishers, contributors, and sources listed in this document would be appreciated in products derived from or utilizing these data.
(803) 256-7322 (voice)
(803) 254-6445 (FAX)
G-WIS for Coastal Louisiana
Although this data has been processed successfully on a computer system at Research Planning, Inc. (RPI), no warranty, expressed of implied, is made by RPI regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Research Planning, Inc. warrants the delivery of this product in computer-readable format, and will offer a replacement copy of the product when the product is determined unreadable by computer input peripherals, or when the physical medium is delivered in damaged condition.
| Data format: | Size: 12.469 |
|---|
(225) 219-5800 (voice)
(225) 219-5802 (FAX)
dgisclair@losco.state.la.us
The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the Louisiana Oil Spill Coordinator's Office (LOSCO) be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The LOSCO does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form. These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures.Although these data have been processed successfully on computers at the LOSCO, no guarantee, expressed or implied, is made by LOSCO regarding the use of these data on any other system, nor does the act of distribution constitute or imply any such warranty. Distribution of these data is intended for information purposes and should not be considered authoritative for navigational, engineering, legal and other site-specific uses.
| Data format: | Geometry, attributes, and metadata in format ARCGeo, shapefile, DBF (version 9.2) ESRI Geodatabase and shapefile, DBF, HTML Size: 1.608 |
|---|---|
| Network links: |
<http://lagic.lsu.edu/data/losco/esi_LDWF_2001.zip> |
| Media you can order: |
DVD-ROM
|
To obtain more information about ordering this data on DVD-ROM, please visit <http://lagic.lsu.edu/loscoweb/> for more information.
(803) 256-7322 (voice)
(803) 254-6445 (FAX)
