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MELCD_2004_Imperviousness.lyr

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Space Imaging
Publication_Date: 11-11-2004
Title: MELCD_2004_Imperviousness.lyr
Geospatial_Data_Presentation_Form: remote-sensing image
Online_Linkage:
\\DEP-EIA1TSGIS01\images\landcover\melcd_2004_imperviousness.tif
Description:
Abstract:
Impervious data set was derived from 5 meter SPOT imagery collected in the summer of 2004 over the State of Maine. The impervious data set is part of a larger mapping initiative by the State of Maine to quantify land cover at a 5 meter resolution over the entire state.

Areas of imperviousness are characterized by anthropogenic features such as buildings, roads, parking lots, etc. Pixel values of 1 (one) indicate a pervious land cover, while pixel values of 0 (zero) indicate impervious land cover features.

Purpose:
Quantify impervious features at a 5 meter spatial resolution over the State of Maine.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Friday, April 1, 2005
Time_of_Day: 15:14 ET
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -71.166741
East_Bounding_Coordinate: -66.849521
North_Bounding_Coordinate: 47.460073
South_Bounding_Coordinate: 42.970783
Keywords:
Theme:
Theme_Keyword_Thesaurus:
REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.
Theme_Keyword: SPOT
Theme_Keyword: Impervious
Theme:
Theme_Keyword: SPOT
Place:
Place_Keyword: Maine
Place_Keyword: ME
Place_Keyword: USA
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Michael Palmer
Contact_Organization: Space Imaging
Contact_Position: GIS / RS Analyst
Contact_Address:
Address_Type: mailing and physical address
Address: 455 E. Eisenhower Parkway
City: Ann Arbor
State_or_Province: MI
Postal_Code: 48108
Country: USA
Contact_Voice_Telephone: 734-213-1060
Contact_Facsimile_Telephone: 734-213-1085
Contact_Electronic_Mail_Address: mpalmer@spaceimaging.com
Hours_of_Service: 0800hrs - 1600hrs (Monday - Friday) ET
Data_Set_Credit: Sanborn Solutions - www.sanborn.com
Security_Information:
Security_Classification: Unclassified
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 1; ESRI ArcCatalog 9.0.0.535
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
This data set was assessed based on the stratified random selection of 298, 25m2 validation samples. For a map at 90% accuracy using a 95% confidence level, the minimum number of sites required will be 298; with the map being rejected if more than 21 are misclassified. Each validation point was photo-interpreted by an analyst to determine its validation call (impervious or pervious) and to ensure that its entire area was a homogenous cover type. The cover type was determined by examining the SPOT imagery in conjunction with existing DOQQ imagery as further reference. A total of 16 validation points were deemed to be incorrect.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: >= 90%
Attribute_Accuracy_Explanation:
Sanborn has developed an efficient procedure to assess accuracy of the impervious classification. The desired map accuracy is 90% for a MMU of 0.89 acres. Since we are working with a two-case situation where we only wish to know whether the classification is right or wrong, we can use a binomial distribution to calculate the sample size. Using this assumption, we can use Ginevan (1978) who illustrates a sampling method using stratified random points that satisfies three criteria: o the scheme should have a low probability of accepting a map of low accuracy. o it should have a high probability of accepting a map of high accuracy. o it should require a minimum number of ground truth samples. Using the look-up table given in the paper that presents the required sample size for a given minimum error and a desired level of confidence, we have determined a specific number of points that are required to meet the accuracy specification. For a map at 90% accuracy using a 95% confidence level (at 95%, we run the risk of a 1 in 20 chance that we reject a map that is actually correct), the minimum number of sites required will be 298; with the map being rejected if more than 21 are misclassified.
Completeness_Report: Impervious data for the state of Maine is complete.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: +/- 15 meters
Lineage:
Source_Information:
Source_Scale_Denominator: 1:24000
Type_of_Source_Media:
SPOT 5 panchromatic imagery, collected April 2004 - October 2004
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\DOCUME~1\sde\LOCALS~1\Temp\3\xml8.tmp
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 1817
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 19
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -69.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 5.000000
Ordinate_Resolution: 5.000000
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: Value table
Overview_Description:
Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 18.554
Metadata_Reference_Information:
Metadata_Date: 20060705
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Michael Palmer
Contact_Organization: Space Imaging
Contact_Position: GIS / RS Analyst
Contact_Address:
Address_Type: mailing and physical address
Address: 455 E. Eisenhower Parkway
City: Ann Arbor
State_or_Province: MI
Postal_Code: 48108
Country: USA
Contact_Voice_Telephone: 734-213-1060
Contact_Facsimile_Telephone: 734-213-1085
Contact_Electronic_Mail_Address: mpalmer@spaceimaging.com
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Security_Information:
Metadata_Security_Classification: Unclassified
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Generated by mp version 2.8.6 on Wed Jul 05 16:17:29 2006