Identification_Information: Citation: Citation_Information: Originator: VeeAnn A. Cross Publication_Date: 2011 Title: CORSICA_CLRHSHD.TIF: Color-Hillshade Relief GeoTIFF Image of the Corsica River Estuary Area (UTM, Zone 18, NAD83) Geospatial_Data_Presentation_Form: remote-sensing image Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1094 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2010/1094/html/data/basemap/corsica_clrhshd.zip Online_Linkage: http://pubs.usgs.gov/of/2010/1094/html/catalog.html Larger_Work_Citation: Citation_Information: Originator: VeeAnn A. Cross Originator: John F. Bratton Originator: Charles R. Worley Originator: John Crusius Originator: Kevin D. Kroeger Publication_Date: 2011 Title: Continuous resistivity profiling data from the Corsica River Estuary, Maryland Edition: version 1 Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1094 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2010/1094/ Description: Abstract: Submarine groundwater discharge (SGD) into Maryland's Corsica River Estuary was investigated as part of a larger study to determine the importance of nutrient delivery to Chesapeake Bay via this pathway. Resource managers are concerned about nutrients that are entering the estuary via submarine groundwater discharge from this primarily agricultural watershed that may be contributing to eutrophication, harmful algal blooms, and fish kills. An interdisciplinary U.S. Geological Survey (USGS) science team conducted field operations in the estuary in April and May 2007. Techniques used included continuous resistivity profiling (CRP), piezometer sampling, seepage meter measurements, and collection of a radon tracer time series. Better understanding of the style, locations, and rates of groundwater discharge could lead to improved models and mitigation strategies for estuarine nutrient over-enrichment in the Corsica River Estuary, and other similar settings. More information on the field work can be accessed from the Woods Hole Coastal and Marine Science Center Field Activity webpage: Purpose: The purpose of this dataset is to provide the color-hillshade relief image of the Corsica River Estuary area in GeoTIFF format (UTM zone 18, NAD83) that can be viewed by a variety of software programs. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -76.160718 East_Bounding_Coordinate: -76.060537 North_Bounding_Coordinate: 39.121622 South_Bounding_Coordinate: 39.034459 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: bathymetry Theme_Keyword: NOAA's Ocean Service, Special Projects Theme_Keyword: hydrographic survey Theme_Keyword: estuary Theme_Keyword: estuarine bathymetry Theme_Keyword: elevation Theme_Keyword: digital elevation model Theme_Keyword: DEM Theme_Keyword: raster Theme_Keyword: National Elevation Dataset Theme_Keyword: NED Theme_Keyword: Light Detection And Range Theme_Keyword: LIDAR Theme_Keyword: NOAA Coastal Services Center Theme_Keyword: color-hillshade relief Theme_Keyword: GeoTIFF Theme_Keyword: National Oceanic and Atmospneric Administration Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: inlandWaters Theme_Keyword: oceans Theme_Keyword: oceans and estuaries Theme_Keyword: oceans and coastal Theme_Keyword: imageryBaseMapsEarthCover Place: Place_Keyword_Thesaurus: General Place_Keyword: North America Place_Keyword: North Atlantic Place_Keyword: United States Place_Keyword: Maryland Place_Keyword: Corsica River Estuary Place_Keyword: Chesapeake Bay Access_Constraints: None. Use_Constraints: The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey and the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS) as the originators of the individual datasets. These data are not to be used for navigation. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2010/1094/data/basemap/corsica_clrhshd.gif Browse_Graphic_File_Description: Thumbnail image of the color-hillshade relief image from the Corsica River Estuary area. Browse_Graphic_File_Type: GIF Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500 Cross_Reference: Citation_Information: Originator: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Special Projects (SP) Publication_Date: 1998 Title: Chesapeake Bay, VA/MD (M130) Bathymetric Digital Elevation Model (30 meter resolution) Derived From Source Hydrographic Survey Soundings Collected by NOAA Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Silver Spring, MD Publisher: NOAA's Ocean Service, Special Projects (SP) Online_Linkage: http://estuarinebathymetry.noaa.gov/ Cross_Reference: Citation_Information: Originator: U.S. Geological Survey (USGS), EROS Data Center Publication_Date: 1999 Title: National Elevation Dataset Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Sioux Falls, SD Publisher: U.S. Geological Survey Online_Linkage: http://ned.usgs.gov/ Online_Linkage: http://seamless.usgs.gov/ Cross_Reference: Citation_Information: Originator: NOAA Coastal Services Center Coastal Remote Sensing Program Publication_Date: 20070613 Title: 2003 Maryland LIDAR mapping project Geospatial_Data_Presentation_Form: raster digital data Other_Citation_Details: Time period of content is 20030301 to 20031130 Online_Linkage: http://www.csc.noaa.gov/ldart Online_Linkage: http://www.csc.noaa.gov/lidar Data_Quality_Information: Logical_Consistency_Report: The individual datasets making up this combined dataset were not scrutinized for errors. Completeness_Report: This dataset represents the complete elevation information for the area of interest in GeoTIFF format. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: This image is a combination of three different datasets with three different horizontal accuracies. For the LIDAR data, the metadata reports the horizontal accuracy as "The horizontal coordinate values were designed to meet NSSDA accuracy for data at 1:2400 scale." The metadata for the NED elevation data does not specify a horizontal accuracy. The Chesapeake Estuarine bathymetry dataset metadata reports the horizontal accuracy as "The horizontal accuracy of the DEM is expressed as an estimated root mean square error (RMSE). The estimate of the RMSE is based upon horizontal accuracy tests of the source soundings used to generate the DEM. As a first approximation the locational accuracy of the source soundings are 0.0015 m at source "Smooth Sheet" scale (120 m @ 1:80,000 to 15 m @ 1:10,000). Smooth Sheets are maps generated as a principle product of each (historic) hydrographic survey with fully corrected soundings plotted on them. Digital elevation models comply with the National Map Accuracy Standards (NMAS) accuracy requirements. The positional accuracy is estimated at 3 meters." Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: This image is a combination of three different datasets with three different vertical accuracies. For the LIDAR data, the metadata reports the vertical accuracy as "The RMSE value of 14.3 cm at the 95% confidence level was determined by an independent accuracy assessment conducted by Dewberry LLC according to the contract specifications. These specifications followed FEMA Appendix A guidelines regarding assessing vertical accuracy. For data accurate to within 18.5 cm RMSE, the guidelines recommended a minimum of 20 independent check points be located in each of 5 different land cover categories: Grass/Ground, High Grass/Crops, Brush/Low Trees, Forest, and Urban/Pavement. A total of 125 points were used for the assessments. These points were surveyed by a licensed land surveyor and provided a positional location and elevation with an accuracy that exceeded the predicted accuracy of the LIDAR data. The entire accuracy reports can be found at . The RMSE value is 14.3 cm. See the Vertical Positional Accuracy Report section for more information." The metadata for the NED elevation data does not specify a vertical accuracy. The Chesapeake Estuarine bathymetry dataset metadata reports the vertical accuracy as "The vertical RMSE statistic is used to describe the vertical accuracy of a DEM. It encompasses both random and systematic errors introduced during production of the data. The RMSE is encoded in element number 5 of record C of the DEM. This accuracy estimate includes components related to quantization of the source soundings (1.3 to 0.15 m), the systematic editing of the source data (1percentor 0.10m), un-sampled bathymetric features (estimated at less than 5percentof depth), time related changes (erosion, deposition, and seismic shifts), and dredging operations (cut and fill). It is estimated that the accuracy of the Bathymetric DEMs is 2 percent of depth or 1 meter for depths grater than 20 meters and 2 percent of depth or 0.20 meters for depths shallower than 20 meters. THESE DEMs SHOULD NOT BE USED FOR NAVIGATION. There are three types of DEM vertical errors: blunder, systematic, and random. These errors are reduced in magnitude by editing but cannot be completely eliminated. Blunders are errors of major proportions and are easily identified and removed during interactive editing. Systematic errors follow some fixed pattern and are introduced by data collection procedures and systems. Systematic error artifacts include vertical unsampled elevation shifts, relative spacing of the source soundings, misinterpretation of terrain surface caused by softness or poor reflectivity and by the resolution of the collected soundings (feet, feet and fractions, fathoms, fathoms and fractions, meters, tenths of meters etc.). Random errors result from unknown or accidental causes. The 1 degree (DSQ) DEMs are generated from 30 m grids on UTM projection. The RMSE difference between these surfaces is an estimate of the vertical accuracy of the DSQ DEMs." Lineage: Process_Step: Process_Description: Output the colormap used with the elevation dataset from ArcMap 9.2. To do this, used VACExtras 2.1 - VACExtras - Raster - Import or Export to GMTraster legend. I selected the option to export, chose the combelev as the raster theme (with the legend displayed in the colors of choice as a classified legend), and output the results to the file corsical_elev.cpt. This process step and all subsequent process steps were carried out by the same person - VeeAnn A. Cross. The original elevation dataset and the metadata for how that grid was generated are available from the basemap section at http://pubs.usgs.gov/of/2010/1094/html/catalog.html. Source_Used_Citation_Abbreviation: combelev Process_Date: 200911 Source_Produced_Citation_Abbreviation: corsical_elev.cpt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: Used Mirone version 1.4.0 standalone software to read the binary grid (combelev). Loaded the color map using Image - Color Palettes - Change color palette. Then File - Read GMT Palette - Use Z-levels. At this point I can load the cpt file with the colormap information in it. Then used the Shaded Illumination button - GMT grdgradient - option 2 (Lambertian) and set the Azimuth to 315 and the Elevation to 30. And finally saved the image as a GeoTIFF - corsica_clrhshd.tif under File - Save Image as - GeoTIFF. This opens another window, in which I check the box "Preserve Image original size". Source_Used_Citation_Abbreviation: combelev Source_Used_Citation_Abbreviation: corsical_elev.cpt Process_Date: 200911 Source_Produced_Citation_Abbreviation: corsica_clrhshd.tif Process_Step: Process_Description: Used GeoTIFFExamine to write the GeoTIFF header information to a TIFF world file. Source_Used_Citation_Abbreviation: corsica_clrhshd.tif Process_Date: 200911 Source_Produced_Citation_Abbreviation: corsica_clrhshd.tfw Process_Step: Process_Description: Upon initial display in ArcMap 9.2, the colors weren't what were expected. So I opened the TIFF image in Adobe Photoshop CS3 and resaved the TIFF with no compression, Pixel Order interleaved, and IBM PC byte order. This seemed to resolve the color display issues. Source_Used_Citation_Abbreviation: corsica_clrhshd.tif Process_Date: 201004 Source_Produced_Citation_Abbreviation: corsica_clrhshd.tif Process_Step: Process_Description: Using Photoshop to resave the TIFF image had the effect of deleting the spatial referencing information in the header of the file. So I used GeoTIFFExamine to read the world file information back into the header of the image making the image a GeoTIFF. Source_Used_Citation_Abbreviation: corsica_clrhshd.tfw Process_Date: 201004 Source_Produced_Citation_Abbreviation: corsica_clrhshd.tif Process_Step: Process_Description: Then defined the projection using ArcMap 9.2 - ArcToolbox - Data Management Tools - Projections and Transformations - Define Projection. This creates the aux file that ArcGIS reads with the complete projection parameters. The tool parameters: input: corsica_clrhshd.tif; coordinate system: NAD_1983_UTM_Zone18N Source_Used_Citation_Abbreviation: corsica_clrhshd.tif Process_Date: 201004 Source_Produced_Citation_Abbreviation: corsica_clrhshd.aux Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 319 Column_Count: 285 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -75.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 30.000000 Ordinate_Resolution: 30.000000 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 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: There are no attributes associated with the GeoTIFF image. Pixel values convey RGB values of individual cells. The shades of blue represent underwater bathymetry areas while the tans and greens are land elevation areas. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: Neither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. 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: WinZip Format_Version_Number: 9.0 Format_Information_Content: This WinZip file contains the color-hillshade relief GeoTIFF image, the TIFF world file, and the associated metadata files. Transfer_Size: 0.300 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2010/1094/html/catalog.html Network_Resource_Name: http://pubs.usgs.gov/of/2010/1094/data/basemap/corsica_clrhshd.zip Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.75 Recording_Density_Units: GBytes Recording_Format: UDF Fees: none Technical_Prerequisites: This WinZip contains a GeoTIFF image and an accompanying world file. The user must have software capable of uncompressing the WinZip file. To simply view the image, any software capable of reading a TIFF file is sufficient. To view the image in its geospatial location, the user must have software that is either capable of reading the header information in the GeoTIFF, or alternatively reading the registration information in the TIFF world file. Metadata_Reference_Information: Metadata_Date: 20110307 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@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