kearney_irr_2002

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: CALMIT

Publication_Date: March 2003

Title: kearney_irr_2002

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: CALMIT

Publisher: University of Nebraska - Lincoln

 

Description:

Abstract:

Irrigated lands estimate for Kearney County, summer 2002. This file was created using satellite imagery and field data to estimate irrigated lands during the drought of 2002.

Purpose:

This shapefile was created as part of a COHYST (Cooperative Hydrology in the Central Platte River Basin) sponsored study to determine if a satellite derived vegatation index (NDVI) could be used to identify irrigated fields during the summer of 2002.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: March 2003

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -99.182817

East_Bounding_Coordinate: -98.718468

North_Bounding_Coordinate: 40.687924

South_Bounding_Coordinate: 40.346479

Keywords:

Theme:

Theme_Keyword: Irrigated Lands

Theme:

Theme_Keyword: Irrigation Identification

Place:

Place_Keyword: Kearney County, NE

Stratum:

Stratum_Keyword: Cooperative Hydrology Study in the Central Platte River Basin

Access_Constraints: none

Use_Constraints: none

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Patti Dappen

Contact_Organization: CALMIT

Contact_Position: GIS/Remote Sensing Specialist

Contact_Address:

Address_Type: mailing address

Address: 113 Nebraska Hall

City: Lincoln

State_or_Province: NE

Postal_Code: 68588-0517

Contact_Voice_Telephone: (402) 472-6159

Contact_Facsimile_Telephone: (402) 472-4608

Contact_Electronic_Mail_Address: pdappen@calmit.unl.edu

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.2.0.700

Data_Quality_Information:

Lineage:

Process_Step:

Process_Description:

Landsat 7 satellite imagery was acquired for Kearney County on August 14th, 2002. The Normalized Difference Vegetation Index (NDVI) was calculated for this date to measure the health and vigor of vegetation. Using field data collected in the fall of 2002, significant threshold NDVI values were identified in the image. A non-agricultural mask was applied to the NDVI image to remove non-agricultural areas from the analysis. Using the field data it was determined that NDVI values greater than 129 were found to represent the most irrigated pixels with out significantly misclassifying non-irrigated pixels. A series of filters were applied to this raster file to eliminate mixed pixels. This final raster file was converted to a shapefile.

Process_Date: February 2003

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\pdappen\LOCALS~1\Temp\xml696.tmp

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: 2993

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System 1983

State_Plane_Coordinate_System:

SPCS_Zone_Identifier: 2600

Lambert_Conformal_Conic:

Standard_Parallel: 40.000000

Standard_Parallel: 43.000000

Longitude_of_Central_Meridian: -100.000000

Latitude_of_Projection_Origin: 39.833333

False_Easting: 1640416.666667

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000256

Ordinate_Resolution: 0.000256

Planar_Distance_Units: survey feet

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: kearney_irr_2002

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:

Attribute_Label: PERIMETER

Attribute:

Attribute_Label: KEARNEY_IR

Attribute:

Attribute_Label: KEARNEY__1

Attribute:

Attribute_Label: GRID_CODE

Attribute_Definition: Irrigation Code, 0 = non-irrigated, 1= irrigated

 

Metadata_Reference_Information:

Metadata_Date: 20030226

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: CALMIT

Contact_Person: Patti Dappen

Contact_Position: GIS/Remote Sensing Specialist

Contact_Address:

Address_Type: mailing address

Address: 113 Nebraska Hall

City: Lincoln

State_or_Province: NE

Postal_Code: 68588-0517

Contact_Voice_Telephone: (402) 472-6159

Contact_Facsimile_Telephone: (402) 472-4608

Contact_Electronic_Mail_Address: pdappen@calmit.unl.edu

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