Identification_Information: Citation: Citation_Information: Originator: William H. Langer Publication_Date: 1988 Title: Digital map showing potential source areas of sand and gravel aggregate by geographic region Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1594 Publication_Information: Publication_Place: Denver, CO Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/bul/b1594/ Larger_Work_Citation: Citation_Information: Originator: William H. Langer Publication_Date: 1988 Title: Natural Aggregates of the Conterminous United States Geospatial_Data_Presentation_Form: plate Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1594 Publication_Information: Publication_Place: Washington Publisher: United States Government Printing Office Online_Linkage: http://pubs.usgs.gov/bul/b1594/ Description: Abstract: This dataset is the digital version of the Map showing potential source areas of sand and gravel aggregate by geographic region that was compiled by William H. Langer and others in 1988. The paper version was included as Plate 1 in U.S. Geological Survey Bulletin 1594, Natural Aggregates of the Conterminous United States, at a scale of 1:5,000,000. The map is subdivided into regions of the conterminous United States based on various natural processes that affected the formation of the aggregate deposits. Two shapefiles are included as the dataset -- one with polygon features of potential source areas of sand and gravel for the conterminous United States (sandgrav), and the other with polygon features delineating the five geographic regions discussed in Bulletin 1594 (regions). The National Atlas state boundary and stream and water bodies base layers can be downloaded from the National Atlas website at http://nationalatlas.gov/atlasftp.html Purpose: This dataset was developed to produce the Map showing potential source areas of sand and gravel aggregate by geographic region included as Plate 1 of U.S. Geological Survey Bulletin 1594. The data are now being made available to the public in digital form. Supplemental_Information: A description of the map preparation process and references can be found in U.S. Geological Survey Bulletin 1594, Natural Aggregates of the Conterminous United States, written by William H. Langer (1988). Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1988 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -128.50 East_Bounding_Coordinate: -62.50 North_Bounding_Coordinate: 51.75 South_Bounding_Coordinate: 23.25 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: sand Theme_Keyword: gravel Theme_Keyword: aggregate Place: Place_Keyword_Thesaurus: none Place_Keyword: USA Access_Constraints: none Use_Constraints: This database is not meant to be used or displayed at any scale other than 1:5,000,000. Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: William H. Langer Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: USGS, Denver Federal Center Address: P.O. Box 25046, MS 973 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 303-236-1249 Contact_Facsimile_Telephone: 303-236-3200 Contact_Electronic_Mail_Address: blanger@usgs.gov Data_Set_Credit: William H. Langer and others Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The values of the attributes were assigned by gathering information on a state-by-state basis. Some regional and national maps were used when little or no information was available for a state or to resolve conflicts between data sources. A description of the map preparation process and references can be found in U.S. Geological Survey Bulletin 1594, Natural Aggregates of the Conterminous United States, written by William H. Langer (1988). For more detailed information, the user should see the references cited in Bulletin 1594 or should contact State geological surveys or State highway depatments at the addresses shown at the end of the Bulletin. Logical_Consistency_Report: All polygons were checked for closure with vendor software and on hard copy plots. Overshoots and undershoots have been deleted or corrected as appropriate. Completeness_Report: n/a Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The map was prepared at a scale of 1:5,000,000, or 1 inch equals approximately 79 miles. At this scale, the distribution of natural aggregates can not be shown in detail. Instead, the map is intended to be an overview; it shows the relative abundance of natural aggregates and the distribution of major areas where natural aggregates is likely to occur. Lineage: Process_Step: Process_Description: State-by-state information was gathered where possible from state maps, written descriptions of sand and gravel availability, etc. Process_Date: Unknown Process_Step: Process_Description: Map was compiled by transferring gathered information to a 1:5,000,000 scale base map. When written descriptions were given of where sand and gravel could most likely be found, the approximate areas were plotted on the base map. State map publications that specify the areas where sand and gravel deposits are likely to occur were reduced and plotted on the base map. The publications that divided States into regions based on availability of aggregate were used as guides to the distribution of aggregate, but they were not directly used in preparation of the map since they did not provide enough detail. To solve discrepancies at borders, national maps or regional maps were used as supplemental sources of data. Process_Date: Unknown Process_Step: Process_Description: Because some State maps had more detail than others, changes were made to provide for equal overall accuracy of the national map, rather than for extensive detail in only a few States. This was accomplished by compiling all maps at the 1:5,000,000 scale, then smoothing some contacts, enlarging some units to emphasize their existence, and deleting some units. Process_Date: Unknown Process_Step: Process_Description: Drafts of Plate 1 were sent to the directors of each of the State highway departments and State geological surveys of the conterminous United States for their comments and review. More than 80 percent of the agencies responded. The map reflects the State reviews wherever possible. The comments of the State agencies are greatly appreciated; however, their comments do not necessarily represent an endorsement of this report. Furthermore, the State agencies that responded to the review request did not officially approve the maps, and they have no official responsibility for the data shown on the maps or discussed in the report. This responsibility rests solely with the author of the Bulletin. Process_Date: Unknown Process_Step: Process_Description: Internal review and subsequent edits were made. Plate 1 of USGS Bulletin 1594 was created and published in 1988. Plate 1 was digitized, and the shapefiles sandandgrav and regions were created and attributed at a later date. Process_Date: Unknown Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 2065 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 5 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Lambert Conformal Conic Lambert_Conformal_Conic: Standard_Parallel: 33.000000 Standard_Parallel: 45.000000 Longitude_of_Central_Meridian: -96.000000 Latitude_of_Projection_Origin: 39.000000 False_Easting: 0.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.008192 Ordinate_Resolution: 0.008192 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: Detailed_Description: Entity_Type: Entity_Type_Label: sandgrav Entity_Type_Definition: Shapefile for the sand and gravel polygon data. Entity_Type_Definition_Source: Author Attribute: Attribute_Label: FID 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: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: TYPE Attribute_Definition: Sand and gravel. Attribute_Definition_Source: Authors Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: sand and gravel Enumerated_Domain_Value_Definition: Polygon has been identified as a potential source area of sand and gravel aggregate. Enumerated_Domain_Value_Definition_Source: n/a Detailed_Description: Entity_Type: Entity_Type_Label: regions Entity_Type_Definition: Shapefile for the geographic region polygon data. Entity_Type_Definition_Source: Author Attribute: Attribute_Label: FID 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: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: GEOGREG Attribute_Definition: Geographic region. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Major regions covered with glacial materials Enumerated_Domain_Value_Definition: Areas covered with deposits from small alpine glaciers in California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming are not included. Potential sand and gravel aggregate occurs primarily as glaciofluvial deposits or as alluvial deposits along modern rivers and streams. Numerous smaller deposits of potential sand and gravel aggregate, in addition to those mapped, occur throughout much of the area, particularly in New England and in the northwestern States. Some areas lack significant deposits of sand and gravel, particularly midwestern areas of extensive glacial lake deposits and the Missouri Plateau. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: Major regions of large alluvial valleys Enumerated_Domain_Value_Definition: Potential sources of sand and gravel aggregate occur primarily as alluvial fan deposits where mountain streams enter valleys or as terraces or beaches along the valley margins. Numerous significant areas of potential sand and gravel aggregate occur throughout the area. Sand and gravel aggregate generally is abundant. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: Coastal plain provinces Enumerated_Domain_Value_Definition: Major deposits of potential sand and gravel aggregate are generally limited to those areas shown on the map. Sand and gravel aggregate is most common in terraces near the Fall Line and in alluvium of streams or rivers issuing from the Piedmont. Much of the region lacks signficant deposits of sand and gravel aggregate. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: Regions of the midwest covered with soft sedimentary rocks Enumerated_Domain_Value_Definition: Major deposits of potential sources of sand and gravel aggregate are generally limited to those areas shown on the map. Large deposits of sand and gravel aggregate are commonly restricted to terraces on the mountain flanks or to channel and terrace deposits of major rivers and streams. Alluvial gravels become progressively more scarce downstream from the mountains. Much of the region lacks significant deposits of sand and gravel aggregate. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: Regions of bedrock or residual materials resulting from the weathering of bedrock in place Enumerated_Domain_Value_Definition: Major sources of potential sand and gravel aggregate are generally limited to those areas shown on the map. Large deposits of sand and gravel aggregate are commonly restricted to channel and terrace deposits along rivers and streams. Much of the region lacks significant deposits of sand and gravel aggregate. Enumerated_Domain_Value_Definition_Source: Author Attribute: Attribute_Label: REGCODE Attribute_Definition: Numerical value assigned to each region. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Major regions covered with glacial materials Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: Major regions of large alluvial valleys Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: Coastal plain provinces Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: Regions of the midwest covered with soft sedimentary rocks Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: 5 Enumerated_Domain_Value_Definition: Regions of bedrock or residual materials resulting frm the weathering of bedrock in place Enumerated_Domain_Value_Definition_Source: Author Overview_Description: Entity_and_Attribute_Overview: Areas mapped commonly contain mixtures of sand and gravel where gravel makes up approximately 25 percent or more of the mixture. Areas that are predominantly sand may be included in the mapped areas; however, areas of potential sources of sand (without gravel) have not been mapped. For cartographic purposes, some areas have been greatly exaggerated in size. Marine sand and gravel deposits, located on the continental shelves, are shown where gravel makes up approximately 25 percent or more of the mixture. Entity_and_Attribute_Detail_Citation: ESRI Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: P.O. Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225-0286 Country: USA Contact_Voice_Telephone: (888) ASK-USGS Resource_Description: Downloadable Data Distribution_Liability: Although these data have been subjected to rigorous review and are substantially complete, they are released on the condition that neither the U.S. Geological Survey nor the United States Government may be held liable for any damages resulting from their authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: SHP Format_Version_Number: ArcGIS v. 9.0 File_Decompression_Technique: 2 .zip files -- self-extracting Window ZIP archive (SHP files) -- execute file to extract Transfer_Size: 3.953 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/bul/b1594/ Fees: Contact USGS at the address listed above Metadata_Reference_Information: Metadata_Date: 20041207 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Laurie C. Morath Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: USGS, Denver Federal Center Address: P.O. Box 25046, MS 973 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5361 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile