Identification_Information: Citation: Citation_Information: Originator: Iowa Gap Analysis Program Publication_Date: August 8, 2001 Publication_Time: Unknown Title: Iowa Gap Land Cover, 1992 V2.3 Edition: Second Geospatial_Data_Presentation_Form: raster digital data Online_Linkage: www.iowagap.iastate.edu Description: Abstract: Land cover of Iowa at 30 meter resolution. Generated from 1992 Landsat 5 TM imagery. Land cover classes are at the alliance or formation level in accordance with The Nature Conservancy's modification of the National Vegetation Classification Standard for the Midwest. Purpose: Land cover was created to facilitate the vertebrate species habitat mapping portion of the Iowa Gap Analysis Program. Supplemental_Information: Version 2.1 has individually analyzed Barren class clumps of 1/2 section and larger. The clumps were reassigned to existing classes and a new class was created called Barren/Mixed Vegetation. This new class contains clumps of different recognizable land cover classes. This class functions as a flag to locate these clumps for further refinement. Version 2.2 Barren class clumps in the size range 1/4 to 1/2 section to directly recoded to cropland. Version 2.3 has missing wetlands added to parts of Ida, Crawford, Shelby, Pottawattamie, Mills, Story, Polk, Warren and Clarke counties. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1990 Ending_Date: 1992 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -96.532590 East_Bounding_Coordinate: -90.025563 North_Bounding_Coordinate: 43.562382 South_Bounding_Coordinate: 40.301689 Keywords: Theme: Theme_Keyword_Thesaurus: Roget's Theme_Keyword: land cover Theme_Keyword: land use Theme_Keyword: vegetation Place: Place_Keyword: Iowa Place_Keyword: Midwest Temporal: Temporal_Keyword: 1990's Temporal_Keyword: 2000 Temporal_Keyword: 2001 Temporal_Keyword: 1992 Access_Constraints: None Use_Constraints: None Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: ISU GIS Facility Contact_Person: Robin McNeely Contact_Position: Iowa Gap Land Cover GIS Analyst Contact_Address: Address_Type: mailing and physical address Address: Rm 215 Durham Center City: Ames State_or_Province: Iowa Postal_Code: 50011 Country: USA Contact_Voice_Telephone: 515/294-8451 Contact_Facsimile_Telephone: 515/294-1717 Contact_Electronic_Mail_Address: mobes@iastate.edu Hours_of_Service: 8am - 5pm CST Contact_Instructions: Prefer contact by email Data_Set_Credit: Iowa Gap Analysis Program, Iowa Department of Natural Resources Security_Information: Security_Classification: Unclassified Native_Data_Set_Environment: Arc/Info 7.1 UNIX Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: None Completeness_Report: Complete within the state of Iowa Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: None Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 30 meters Horizontal_Positional_Accuracy_Explanation: Satellite images were registered to DOQs with an RMS of less than 15 meters. Pre-registered images were shifted to match DOQs to within one 30 meter pixel. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: None Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Explanation: No vertical component. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: MRLC, Iowa GAP, Iowa DNR Publication_Date: Unpublished Material Title: Landsat 5 TM imagery Geospatial_Data_Presentation_Form: remote-sensing image Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1990 Ending_Date: 1992 Source_Currentness_Reference: ground condition Source_Contribution: The digital Landsat 5 TM scenes contributed 5 bands of reflectancy values. These values were used in various combinations to produce classification groupings for land cover. Process_Step: Process_Description: For each scene, the forest, herbaceous and artificial classes were processed separately. Within each class, the date of imagery that best separted the possible map units was chosen. Signatures of map units at known sample locations were used to decide which date to use. A mask was made with the chosen date for each vegetation class. That mask was run through an unsupervised classification which resulted in 150 pixel groupings. Known sample sites, DOQs, vegetation signatures and other photos were used to assign map units to a pixel group. Once all pixels of the three previously mentioned classes were reassigned, all pixels in all classes were overlayed into one classified grid. All twelve scene grids were merged into one statewide grid with priority in overlap areas going to the grid with better data quality as perceived by the analyst. Process_Date: August 2001 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: ISU GIS Facility Contact_Person: Robin McNeely Contact_Position: Iowa Gap Land Cover GIS Analyst Contact_Address: Address_Type: mailing and physical address Address: Rm 215 Durham Center City: Ames State_or_Province: Iowa Postal_Code: 50011 Country: USA Contact_Voice_Telephone: 515/294-8451 Contact_Facsimile_Telephone: 515-294-1717 Contact_Electronic_Mail_Address: mobes@iastate.edu Hours_of_Service: 8am - 5pm CST Contact_Instructions: Prefer contact by email Process_Step: Process_Description: The Barren class was clumped in Imagine and clumps larger than 1/2 section (360 pixels) were individually analyzed to determine the correct land cover class. The Spring date of TM imagery viewed with bands 4,5 and 6 associated with red, green and blue was primarily used to determine the class. DOQQs, original NWI data and the clump shape were also used. All analyzed clumps were recoded and overlaid back onto the version 2.0 land cover to produce version 2.1. Process_Date: April 3, 2001 Process_Step: Process_Description: The Barren class was clumped and areas in the size range 1/4 to 1/2 section were directly recoded to cropland. The data were overlaid on version 2.1 land cover to produce version 2.2. Process_Date: April 12, 2001 Cloud_Cover: 0% Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 12011 Column_Count: 18016 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: 15 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -93.000000 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.000000 False_Northing: 0.0 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: GRS80 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: ialandcovc Entity_Type_Definition: Vegetation Attribute: Attribute_Label: ObjectID Attribute_Definition: Internal unique ID Attribute_Definition_Source: assigned by ArcInfo Attribute: Attribute_Label: Value Attribute_Definition: numerical code for vegetation Attribute_Definition_Source: assigned by ERDAS before conversion Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Eastern Red Cedar Forest Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 17 Enumerated_Domain_Value_Definition: Pine Forest Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 18 Enumerated_Domain_Value_Definition: Evergreen Forest Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 19 Enumerated_Domain_Value_Definition: Upland Deciduous Forest Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 20 Enumerated_Domain_Value_Definition: Temporarily Flooded Forested Wetland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 24 Enumerated_Domain_Value_Definition: Seasonally Flooded Forested Wetland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 30 Enumerated_Domain_Value_Definition: Mixed Evergreen/Deciduous Forest Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 41 Enumerated_Domain_Value_Definition: Eastern Red Cedar Woodland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 42 Enumerated_Domain_Value_Definition: Upland Deciduous Woodland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 44 Enumerated_Domain_Value_Definition: Mixed Evergreen/Deciduous Woodland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 51 Enumerated_Domain_Value_Definition: Upland Shrubland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 52 Enumerated_Domain_Value_Definition: Temporarily Flooded Shrubland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 53 Enumerated_Domain_Value_Definition: Seasonally Flooded Shrubland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 54 Enumerated_Domain_Value_Definition: Semi-permanently Flooded Shrubland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 55 Enumerated_Domain_Value_Definition: Saturated Shrubland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 61 Enumerated_Domain_Value_Definition: Warm Season Grass/Perennial Forb Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 66 Enumerated_Domain_Value_Definition: Cool Season Grass/Perennial Forb Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 67 Enumerated_Domain_Value_Definition: Grassland with Sparse Trees or Shrubs Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 71 Enumerated_Domain_Value_Definition: Temporarily Flooded Wetland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 72 Enumerated_Domain_Value_Definition: Seasonally Flooded Wetland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 73 Enumerated_Domain_Value_Definition: Semi-permanently Flooded Wetland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 74 Enumerated_Domain_Value_Definition: Saturated Wetland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 75 Enumerated_Domain_Value_Definition: Permanently Flooded Wetland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 80 Enumerated_Domain_Value_Definition: Sparsely Vegetated/Barren Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 90 Enumerated_Domain_Value_Definition: Cropland Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 101 Enumerated_Domain_Value_Definition: Artificial/High Vegetation Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 102 Enumerated_Domain_Value_Definition: Artificial/Low Vegetation Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 110 Enumerated_Domain_Value_Definition: Open Water Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Enumerated_Domain: Enumerated_Domain_Value: 82 Enumerated_Domain_Value_Definition: Barren/Mixed Vegetation Enumerated_Domain_Value_Definition_Source: Working List of Land Cover Map Labels for Iowa Gap Analysis Attribute: Attribute_Label: Count Attribute_Definition: number of pixels in particular value Attribute_Definition_Source: assigned by ArcInfo Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: ISU GIS Facility Contact_Person: Robin McNeely Contact_Position: Iowa Gap Land Cover GIS Analyst Contact_Address: Address_Type: mailing and physical address Address: Rm 215 Durham Center City: Ames State_or_Province: Iowa Postal_Code: 50011 Country: USA Contact_Voice_Telephone: 515/294-8451 Contact_Facsimile_Telephone: 515/294-1717 Contact_Electronic_Mail_Address: mobes@iastate.edu Hours_of_Service: 8am - 5pm CST Contact_Instructions: Prefer contact by email Resource_Description: Iowa Gap Land Cover, 1992. Version 2.3 Grid: ialandcovc Distribution_Liability: None Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GRID Format_Information_Content: Vegetation File_Decompression_Technique: No compression applied Transfer_Size: 65.0 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: cctr.ait.iastate.edu Access_Instructions: anonymous ftp, anonftp is username, password is left blank Online_Computer_and_Operating_System: Windows NT4.0 Fees: None Ordering_Instructions: Download statewide grid by ftp process Turnaround: Immediately Custom_Order_Process: None Technical_Prerequisites: ArcInfo, ArcView, ERDAS, ArcExplorer or other GIS software that reads Arc GRID Available_Time_Period: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: February 12, 2001 Ending_Date: unknown Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Ree Brannon Contact_Organization: National GAP Analysis Program Contact_Position: Senior GIS Analyst Contact_Address: Address_Type: mailing and physical address Address: 530 S. Asbury St., Suite 1 City: Moscow State_or_Province: ID Postal_Code: 83843 Country: USA Contact_Voice_Telephone: 208-885-3720 Contact_Facsimile_Telephone: 208-885-3618 Contact_Electronic_Mail_Address: abrannon@uidaho.edu Hours_of_Service: 8:00 a.m. to 4:00 p.m. M - F Resource_Description: Iowa Gap Land Cover, 1992. Version 2.2 Grid: ialandcovc Distribution_Liability: 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 accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Arc/Info Format_Information_Content: Vegetation File_Decompression_Technique: No compression applied Transfer_Size: 65.0 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http:/www.gap.uidaho.edu/gap Access_Instructions: anonymous ftp Fees: None Standard_Order_Process: Non-digital_Form: CD-ROM, ISO Format Fees: None Ordering_Instructions: Contact Distributor Custom_Order_Process: None Technical_Prerequisites: ArcInfo, ArcView, ERDAS, ArcExplorer or other GIS software that reads Arc GRID Metadata_Reference_Information: Metadata_Date: 20010423 Metadata_Review_Date: None Metadata_Future_Review_Date: Unknown Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: ISU GIS Facility Contact_Person: Robin McNeely Contact_Position: Iowa Gap Land Cover GIS Analyst Contact_Address: Address_Type: mailing and physical address Address: Rm 215 Durham Center City: Ames State_or_Province: Iowa Postal_Code: 50011 Country: USA Contact_Voice_Telephone: 515/294-8451 Contact_Facsimile_Telephone: 515/294-1717 Contact_Electronic_Mail_Address: mobes@iastate.edu Hours_of_Service: 8am - 5pm CST Contact_Instructions: Prefer contact by email 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_Security_Information: Metadata_Security_Classification: Unclassified Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile