The sediment data presented in this data layer were from a geochemical study sited in Great Bay Estuary, New Hampshire. The analog data were originally converted into digital form for inclusion in a Gulf of Maine Contaminated Sediments Database.
Purpose:
The purpose of this data layer is to release a digital version of the data published in Armstrong (1974).
Image map showing extent and distribution of data layer coverage.
Browse_Graphic_File_Type: GIF
Data_Set_Credit:
Please view the cross reference information for the original data set credit to Armstrong (1974). Steve Jones (UNH) for entering the data from the source report, and Larry Poppe for creating the ArcView shapefile.
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.1 (Build 2600) ; ESRI ArcCatalog 8.2.0.700
Cross_Reference:
Citation_Information:
Originator: P. Armstrong
Publication_Date: 1974
Title:
Copper, zinc, chromium, lead, and cadmium in the unconsolidated sediments of Great bay Estuary, New Hampshire
Edition: 1.0
Series_Information:
Series_Name: Master's Thesis
Issue_Identification: 85 p.
Publication_Information:
Publication_Place: Durham, NH
Publisher: University of New Hampshire
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
All attributes were checked by the compilers in a consistent manner.
Logical_Consistency_Report:
No additional checks for topological consistency were performed on the data
Completeness_Report:
Identifiers, navigation, and grain-size data are provided for 75 stations.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: Navigational accuracy is unknown.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: P. Armstrong
Publication_Date: 1974
Title:
Copper, zinc, chromium, lead, and cadmium in the unconsolidated sediments of Great bay Estuary, New Hampshire
Edition: 1.0
Series_Information:
Series_Name: Master's Thesis
Issue_Identification: 85 p.
Publication_Information:
Publication_Place: Durham, NH
Publisher: University of New Hampshire
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1974
Source_Currentness_Reference: publication date
Process_Step:
Process_Description:
The source information was manually entered into digital form and was imported from an ASCII text file to an ArcView table. The table was later converted to an event theme and saved as the final shapefile.
Regional Mapping of Surficial Sediments: Gulf of Maine and Georges Bank, Aggregates and Habitats Projects, armstrong74.shp
Distribution_Liability:
Although this data set has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcView shapefile
Format_Version_Number: 3.2
Format_Specification: ESRI point shapefile
Format_Information_Content:
Five files (armstrong74.shp, armstrong74.dbf, armstrong74.shx, armstrong74.sbx, armstrong74.sbn) comprising the ArcView point shapefile components, 'prj' and 'avl' files, metadata text file and browse graphic.
File_Decompression_Technique: zip
Transfer_Size: 0.132
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: Mbytes
Compatibility_Information:
The user must have a computer system with a CD-ROM available. To browse the information contained on this CD-ROM, the user must have a current WWW browser available. The user must also have software installed on their computer to unzip the archived file.
Technical_Prerequisites:
The data is available in ArcView shapefile format. The user must have ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView, the user may utilize another GIS application package capable of importing data.
