Identification_Information: Citation: Citation_Information: Originator: John J. Kosovich Publication_Date: 2008 Title: State of Texas -- Highlighting Low-Lying Areas Derived from USGS Digital Elevation Data, ESRI Grid file, tx_ned150_g Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3050 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3050 Description: Abstract: Green channel grid of Texas derived from 30-meter National Elevation Dataset (NED) data which was resampled down to 150 meters. When combined with the corresponding red and blue grids into a multi-band dataset or grid stack, these datasets depict a color shaded relief representation of the state, in which the first 30 feet of relief above mean sea level are displayed as brightly colored 5-foot elevation bands (refer to legend file "SIM3050_elevation_TX.pdf"). These data are designed to support U.S. Geological Survey (USGS) disaster preparedness efforts and are meant to be used at a broad scale and for informational purposes only. Purpose: These data are designed to support U.S. Geological Survey (USGS) disaster preparedness efforts and are meant to be used at a broad scale and for informational purposes only. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -106.976174 East_Bounding_Coordinate: -93.121792 North_Bounding_Coordinate: 36.533883 South_Bounding_Coordinate: 25.705527 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Color shaded relief from DEM Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names Place_Keyword: Texas Place_Keyword: USA Access_Constraints: None Use_Constraints: These data are designed to support U.S. Geological Survey (USGS) disaster preparedness efforts and are meant to be used at a broad scale and for informational purposes only. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U. S. Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25286, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data accuracy is as stated on the source NED data website: http://seamless.usgs.gov Logical_Consistency_Report: The spatial consistency of the data have been visually verified. Completeness_Report: Complete Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Data accuracy is as stated on the source NED data website: http://seamless.usgs.gov Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Data accuracy is as stated on the source NED data website: http://seamless.usgs.gov Lineage: Process_Step: Process_Description: The NED data were derived from the original 1:24,000-scale USGS topographic map bare-earth contours, which were converted into gridded quadrangle-based DEM tiles at a constant post spacing (grid cell size) of either 30 meters (data before the mid-1990s) or 10 meters (mid-1990s and later data). These individual-quadrangle DEMs were then converted to spherical coordinates (latitude/longitude decimal degrees) and edge-matched to ensure seamlessness. The NED source data for this dataset consists of a mixture of 30-meter- and 10-meter-resolution DEMs. Process_Date: 2000-2005 Process_Step: Process_Description: The NED data were downloaded from http://seamless.usgs.gov in 2002. These data were then projected into Albers Equal Area NAD83 at 30-meter horizontal resolution. Process_Date: 2002 Process_Step: Process_Description: The 30-meter UTM elevation grid was resampled to 150-meter resolution. Process_Date: 2005 Process_Step: Process_Description: The data were clipped to the extent of the state boundary Process_Date: 2007 Process_Step: Process_Description: The 150-meter elevation grid was SLICEd into elevation color ranges using a remap table and a color file. Process_Date: 2007 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 7889 Column_Count: 8303 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 27.750000 Standard_Parallel: 34.750000 Longitude_of_Central_Meridian: -100.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 0.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 150.000000 Ordinate_Resolution: 150.000000 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: NAVD88 derived from original NED data in North American Vertical Datum of 1988 Altitude_Resolution: 0.01 meter Altitude_Distance_Units: meters Altitude_Encoding_Method: attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: tx_ned150_g Entity_Type_Definition: shaded relief color band Entity_Type_Definition_Source: USGS National Elevation Dataset (NED) Attribute: Attribute_Label: ObjectID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Value Attribute_Definition: Color value Attribute_Definition_Source: ESRI ArcGIS 9.1.0 Attribute_Domain_Values: Unrepresentable_Domain: 8-bit (0-255) color value. Attribute: Attribute_Label: Count Attribute_Definition: Number of cells for each unique Value attribute Attribute_Definition_Source: ESRI ArcGIS 9.1.0 Attribute_Domain_Values: Unrepresentable_Domain: Statistical enumeration of unique cell values. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Denver Publishing Service Network Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25046 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: http://www.usgs.gov/ask/index.html Resource_Description: Scientific Investigations Map 3050 Distribution_Liability: These data are designed to support U.S. Geological Survey (USGS) disaster preparedness efforts and are meant to be used at a broad scale and for informational purposes only. This database, identified as SIM 3050, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. 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 display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Format_Version_Number: 9.1.0.780 Format_Version_Date: 2005 Transfer_Size: 13.647 File_Decompression_Technique: GZIP TAR archive, In UNIX use the command "gunzip -c | tar xvf .tar" In Windows, use WinZip (http://www.winzip.com/) or other programs to extract the file. (http://www.winzip.com/) or other programs to extract the file. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/3050/ Fees: none Metadata_Reference_Information: Metadata_Date: 20080829 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U. S. Geological Survey Contact_Person: John J. Kosovich Contact_Address: Address_Type: mailing address Address: Box 25286, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: ask@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile