Identification_Information: Citation: Citation_Information: Originator: Lori Fuller U.S. Geological Survey Publication_Date: February 2008 Title: Lake_Variable_SDT_2005 Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: Description: Abstract: Predicted Secchi-disk and Trophic state index values for Michigan inland lakes. U.S. Geological Survery and/or Cooperative Lakes Monitoring Program volunteer measurements (run by the Michigan Department of Environmental Quality and the Michigan Lakes and Streams Association) were related to Landsat 7 ETM+ or Landsat 5 TM satellite data to produce regression equations that predict Secchi-disk and Trophic state index Values for Michigan inland lakes. This layer combines predictions produced from 2003-2006 for various sections of Michigan into one statewide seamless layer situated around 2005, and thus titled Lake_Variable_SDT_2005. There are predicted Secchi-disk and Trophic state index values for all 30-meter cells within each Michigan inland lake greater than 25 acres if the satellite imagery was free of clouds and cloud shadows. Purpose: Developed to predict Secchi-disk transparency and Trophic state index values for Michigan inland lakes. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2003 Ending_Date: 2006 Currentness_Reference: Last modified February 2008 Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -90.446064 East_Bounding_Coordinate: -82.179381 North_Bounding_Coordinate: 47.492912 South_Bounding_Coordinate: 41.646761 Keywords: Theme: Theme_Keyword: Trophic state index Theme_Keyword: Secchi disk Access_Constraints: None Use_Constraints: Use with caution as Secchi-disk transparency and Trophic state index values are predictions. Actual measurements taken by the U.S. Geological Survey can be found at http://waterdata.usgs.gov/mi/nwis Cooperative Lakes Monitoring Program volunteer measurements (run by the Michigan Department of Environmental Quality and the Michigan Lakes and Streams Association) can be found at:http://www.michigan.gov/deq/0,1607,7-135-3313_3686_3731---,00.html Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Data_Quality_Information: Lineage: Process_Step: Process_Description: Source_Used_Citation_Abbreviation: 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: 2158539 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Oblique Mercator Oblique_Mercator: Scale_Factor_at_Center_Line: 0.999600 Oblique_Line_Azimuth: Azimuthal_Angle: 337.255556 Azimuth_Measure_Point_Longitude: -86.000000 Latitude_of_Projection_Origin: 45.309167 False_Easting: 2546731.496000 False_Northing: -4354009.816000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000000 Ordinate_Resolution: 0.000000 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: Detailed_Description: Entity_Type: Entity_Type_Label: Lake_Variable_SDT_2005 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: ID Attribute_Definition: Unique ID field Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy_Explanation: Attribute: Attribute_Label: SDT_FEET Attribute_Definition: Secchi-disk transparency values in feet calculated for 30-meter cells within inland lakes Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy_Explanation: calculated from predicted values Attribute: Attribute_Label: TSI Attribute_Definition: Trophic state index values calculated for 30-meter cells within inland lakes Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy_Explanation: calculated from predicted values Attribute: Attribute_Label: SDT_GROUP Attribute_Definition: Seven groups were created for display purposes Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy_Explanation: groups created from predicted values Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Lori Fuller Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Voice_Telephone: 517 887-8911 Contact_Electronic_Mail_Address: lmfuller@usgs.gov Resource_Description: Standard_Order_Process: Send requests to above contact information to acquire data Digital_Form: Digital_Transfer_Information: Transfer_Size: 437 MB (458,699,786 bytes) Fees: No fee Metadata_Reference_Information: Metadata_Date: 20080220 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Lori Fuller Contact_Address: Address_Type: 6520 Mercantile Way Suite 5 City: Lansing State_or_Province: MI Postal_Code: 48911 Contact_Voice_Telephone: 517 887-8911 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