Grand Lake Extent [U.S. Fish and Wildlife Service] {1830}
Department of the Interior
·
1830
Full Details
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- Title
- Grand Lake Extent [U.S. Fish and Wildlife Service] {1830}
- Description
- These data represent the approximate delineation of land and water in the area of Grand Lake in the Atchafalaya basin in the early 1800s. These data are based on a georectified map of the original township surveys conducted between 1807 and 1838. The composite township survey map was created in 1948 and was obtained from the Louisiana State Lands Office in Baton Rouge, LA. The composite township survey map was georectified using airphots and lidar to current landforms using ERDAS Imagine. The delineation of land and water was conducted using Adobe Photoshop, and was restricted to an arbitrarily defined area that captured most of the former extent of Grand Lake. The resolution of the original delineation was 3x3m and was ressampled to 30x30m in this application for comparison to modern data sourcesThese data represent the approximate delineation of land and water in the area of Grand Lake in the Atchafalaya basin in the early 1800s. These data are based on a georectified map of the original township surveys conducted between 1807 and 1838. The composite township survey map was created in 1948 and was obtained from the Louisiana State Lands Office in Baton Rouge, LA. The composite township survey map was georectified using airphots and lidar to current landforms using ERDAS Imagine. The delineation of land and water was conducted using Adobe Photoshop, and was restricted to an arbitrarily defined area that captured most of the former extent of Grand Lake. The resolution of the original delineation was 3x3m and was ressampled to 30x30m in this application for comparison to modern data sources.The Atchafalaya Basin is a resource that must be managed on a system-wide basis to ensure this invaluable national resource is protected and restored. It is recognized that better tools must be developed for managing the Basin and that data evaluation is necessary to ensure sound decision-making. The natural resource inventory and assessment system (NRIAS) that was approved and funded in the FY 2010 Louisiana Department of Natural Resources Atchafalaya Basin Program Annual Plan and served as the primary tool for decision making in the Basin. The system provided a means for scientists to access relevant project data for the Basin and to request and fund data acquisition, monitoring, and data analysis to be used in project planning. This will be critical in providing information necessary for the development and approval of specific projects to be included for construction in future Annual Plans, projects that meet the needs of Louisiana citizens and protect our our natural resources. This and related datasets were created to demonstrate the patterns of inundation, turbid water and floating aquatic vegetation in the Atchafalaya Basin Floodway System at various river levels of the Atchafalaya River.
- Creator
- Department of the Interior
- Temporal Coverage
- 1830
- Date Issued
- 2025-04-14
- Rights
- The United States Fish and Wildlife Service (Service) shall not be held liable for improper or incorrect use of the data described and/or contained herein. While the Service makes every reasonable effort to ensure the accuracy and completeness of data provided for distribution, it may not have the necessary accuracy or completeness required for every possible intended use. The Service recommends that data users consult the associated metadata record to understand the quality and possible limitations of the data. The Service creates metadata records in accordance with the standards endorsed by the Federal Geographic Data Committee. As a result of the above considerations, the Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of the data. It is the responsibility of the data user to use the data in a manner consistent with the limitations of geospatial data in general and these data in particular. Although these data have been processed successfully on a computer system at the Service, no warranty, expressed or implied, is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This applies to the use of the data both alone and in aggregate with other data and information.
- Access Rights
- Public
- Format
- Imagery
- Language
- English
- Date Added
- April 24, 2025
