United States Geological Survey, FISC St. Petersburg December 2007 vector digital data Open File Report 2007-1431 St. Petersburg, FL USGS The USGS, in cooperation with the National Park Service (NPS) and the National Aeronautics and Space Administration (NASA), is to provide the coastal management community with usable, useful digital elevation products. The USGS processes aircraft Lidar data (provided by NASA), develops software tools and algorithms to use and analyze the data and make products available to the coastal management community through a variety of media, including the internet, CD-ROMs, DVDs and data reports. Firstnone GIS contour lines of Padre Island National Seashore derived from a Lidar GeoTIFF file. This contour shapefile was generated from a Lidar GeoTIFF. It shows contour lines at 1 meter intervals, and will be used to aid in the interpretation and display of data files. See the source Lidar GeoTIFF tile for more specific accuracy information. en 200509302005100120051002 ground condition Complete Unknown NONE Contour mapelevation change Padre Island National Seashore Texas United States Gulf of Mexico Bare earth topography Any use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Ensure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests. See section 6.3 Distribution Liability. Although the USGS is making these data sets available to others who may find the data of value, the USGS does not warrant, endorse, or recommend the use of these data setse for any given purpose. The user assumes the entire risk related to the use of these data. These data sets are not for navigational purposes. The USGS is providing these data "as is", and the USGS disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will the USGS be liable to you or to any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data. Acknowledgement of the U.S. Geological Survey, FISC St. Petersburg office, as a data source would be appreciated in products developed from these data, and such acknowledgement as is standard for citation and legal practices for data source is expected by users of this data. Sharing new data layers developed directly from these data would also be appreciated by the USGS staff. Users should be aware that comparisons with other data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photo interpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such. United States Geological Survey, FISC St. Petersburg mailing and physical address

600 4th Street South

St. Petersburg FL 33701 USA 727 803-8747 8:30-5:00 M-F EST Call Survey for Details The USGS FISC St. Petersburg office, would like to acknowledge NASA Goddard Space Flight Center for their cooperation and assistance in the development of the data. The USGS would also like to acknowledge National Park Service management and personnel at Padre Island National Seashore. Unclassified Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcMap 9.1.0.722 Shapefile The expected accuracy of the measured variables is as follows: attitude within 0.07 degree, 3-cm nominal ranging accuracy, and verticle elevation accuracy of +/- 15cm (bare earth). Quality checks are built into the data-processing software. Contour lines break where there was no data (value of -100) in the original Lidar tiles. Raw elevation measurements have been determined to be within 1.5 meter horizontal accuracy. Processing steps (grid interpolation) may introduce additional error which has not been tested at the time of this publication. Elevations of the DEM are vertically consistent with the point elevation data, +/- 15cm. computer program 200509302005100120051002 The Lidar GeoTIFF data was too coarse to create aesthetically pleasing contours. A Neighborhood Statistics operation was run on the Lidar GeoTIFF file in ARCMap. The settings for the Neighborhood Statistics operation were a 14x14 cell rectangle, using the mean as the statistic type and then output to a temporary raster grid. Summer 2007 National Park Service South Florida/Caribbean Network mailing and physical address

18001 Old Cutler Road, Suite 419

Palmetto Bay FL 33157 USA (305) 252-0347 8:30-5:00 M-F EST Call Survey for Details Contour lines were generated using the Contour operation in ArcMap. The temporary Neighborhood Statistics grid was used as the input surface and the contour interval was set to 1 (meter). This was output to a permanent shapefile. Summer 2007 National Park Service South Florida/Caribbean Network mailing and physical address

18001 Old Cutler Road, Suite 419

Palmetto Bay FL 33157 USA (305) 252-0347 8:30-5:00 M-F EST Metadata imported into ArcCatalog from XML file. 20070911 United States Geological Survey ,FISC St. Petersburg Laurinda J. Travers mailing and physical address

600 4th Street South

St. Petersburg FL 33701 USA 727 803-8747 8:30-5:00 M-F EST This layer was generated from an existing Lidar tile. Vector Universal Transverse Mercator 14 0.999600 -75.000000 0.000000 500000.000000 0.000000 row and column 1.000000 1.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983NAD_1983_UTM_Zone_14N North American Vertical Datum of 1988 .15 meters Explicit elevation coordinate included with horizontal coordinates United States Geological Survey, FISC St. Petersburg mailing and physical address

600 4th Street South

St. Petersburg FL 33701 USA 727-803-8747 8:30-5:00 M-F EST Call USGS for Details The U. S. Geological Survey gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from a U. S. Geological Survey server and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on a computer system at the U. S. Geological Survey, 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 disclaimer applies both to individual use of the data and aggregate use with other data. 0.000 Contact USGS for Details Contact U. S. Geological Survey for Details 200509302005100120051002 United States Geological Survey, FISC St. Petersburg Laurinda J. Travers mailing and physical address

600 4th Street South

St. Petersburg FL 33701 USA 727-803-8747 8:30-5:00 M-F EST Call Survey for Details FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time Unclassified 20080108en 20080108152734002008010910391200TRUE{BEAB0974-15A8-4D43-969C-5495638EEE4D}20080108file://\\IGSAFPESWS114\D$\Science_Support_PC\L_Travers\J_Brock\Updated_Lidar_OFRS\PAIS\Metadata\Meta_temps\Meta_contourLocal Area Network