King County Image/Raster base tiling index - idxp7500

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: King County

Publication_Date: 200307

Title: King County Image/Raster base tiling index - idxp7500

Edition: One

Geospatial_Data_Presentation_Form: Vector Digital Data

Publication_Information:

Publication_Place: King County, WA

Publisher: King County

Other_Citation_Details: None

Online_Linkage: None

Description:

Abstract:

A spatial tiling index designed for storage of file-based image and other raster (i.e., LiDAR elevation, landcover) data sets. A regular grid with origin at 0,0 of the Washington North State Plane Coordinate System, with grid cells defined by orthogonal bounds 7500 feet long in easting and in northing. Only those cells currently involved in one of several image/raster data projects for King County and southwestern Snohomish County are labelled, though the labeling scheme can be extended.

The name of the spatial index is derived from the acronym (I)n(D)e(X) (P)olygons at the (7500) foot tile level, or idxp7500.

Cell label is a row-id cocantenated with a column-id generating a four-character identifier that uniquely identifies every cell. The row portion of the identifier is a two-character alpha code of the format aa, ab, ac.... ba, bb, etc. and the column portion is a two-digit integer value such as 01, 02, 03.... 11,12,13, etc. A composite cell identifier would be then, for example, aa01, aa02, .....ba11,ba12, etc.

Not all image and raster data is stored at the tiling level represented by this index. Data is stored at this level if full-resolution, uncompressed data would generate larger than manageable file sizes at a larger tile size.

Purpose:

This index is primarily a data processing, data storage level index which allows all raster and image data stored at this level to be maintained in a common, consistent tile and naming scheme. The index also serves as a useful central reference scheme for identification of real-world locations.

This index level is useful for users of LiDAR-derived elevation data stored as TINS because TIN format data, as well as ASCII format data, are stored only at this tiling level. Imagery in native uncompressed format will also be stored only at this level.

As each cell is defined with orthogonal edges relative the Washington State Plane coordinate system, it accomodates most common pixel resolutions of multiple ground sample distance (gsd) without partial pixel effects and without zero or NULL data 'splinters'.

Supplemental_Information:

This spatial index is one of three index or tiling levels used to store King County image and raster data. Each higher index level is designed to build upon the lower levels, with the same data often stored at more than one level (though at different resolutions) to meet a range of business and software requirements.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 200301

Ending_Date: 200307

Currentness_Reference: Publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None

Spatial_Domain:

Description_of_Geographic_Extent:

The PSLC project area in combination with the King County ESA/SAO Project area
comprise the entirety of King County and southwestern Snohomish County (WRIA 8).
The PSLC portion encompasses approximately 500 square miles, including Vashon
Island, the Seattle urban environs, and mid-central King County. The ESA/SAO
portion, approximately 1800 square miles,includes the remainder of King County
and the Snohomish portion.

Bounding_Coordinates:

West_Bounding_Coordinate: -121.500000

East_Bounding_Coordinate: -121.100000

North_Bounding_Coordinate: +47.800000

South_Bounding_Coordinate: +47.100000

Keywords:

Theme:

Theme_Keyword_Thesaurus: Not applicable

Theme_Keyword: Image data

Theme_Keyword: Raster data

Theme_Keyword: Spatial index

Theme_Keyword: Tiling Index

Place:

Place_Keyword_Thesaurus: Not applicable

Place_Keyword: King County, WA

Place_Keyword: Pacific NW

Place_Keyword: Washington state

Place_Keyword: Seattle

Place_Keyword: Snohomish County, southwestern portion

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Michael Leathers

Contact_Organization:

King County Geographic Information Center, Department of Natural Resources and Parks

Contact_Position: GIS Data Coordinator

Contact_Address:

Address_Type: Mailing and physical address

Address: 201 S Jackson St, Suite 706

City: Seattle

State_or_Province: WA

Postal_Code: 98104

Country: USA

Contact_Voice_Telephone: 206-263-4867

Native_Data_Set_Environment:

ArcInfo, ArcView and any other software that can read ESRI shapefile format on Windows or Unix. Index is available only in shapefile format.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Identifiers for each cell are sequential and unique.

Logical_Consistency_Report: All cells have a label attribute

Completeness_Report:

The index currently covers the King County and southwestern Snohomish County areas currently involved in several related image/raster data acquisition projects. The extent has been buffered to encompass some adjoining areas.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The bounds of each cell were generated from State Plane easting and northing coordinate values defined from the 0,0 origin and at even 7500 increments.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: King County

Publication_Date: 2003

Title: King County ESA/SAO Data Acquisition project

Geospatial_Data_Presentation_Form: Vector digital data

Publication_Information:

Publication_Place: King County, WA

Publisher: King County

Other_Citation_Details:

This index was developed jointly between the King County Dept of Transportation Roads Maintenance Dept and the King County GIS Center

Type_of_Source_Media: Not Applicable

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 012003

Ending_Date: 072003

Source_Currentness_Reference: Publication date

Source_Citation_Abbreviation: ESA/SAO

Source_Contribution:

A common data storage mechanism for file-based image/raster data at highest (full) resolution.

Process_Step:

Process_Description:

ArcInfo GENERATE command with FISHNET option was used to create the polygon coverage of individual cells. The coverage was converted to a shapefile. An integer row-id and integer column-id were updated for the PAT. The values from each of these items was cocatenated to produce a unique integer identifier for each cell.

Process_Date: 012003

Process_Step:

Process_Description:

Microsoft Excel was used to create a master attribute spreadsheet with all other cell attributes tied to the unique integer id of each cell. The data from the spreadsheet was exported to text format and joined to the shapefile dbf in ArcView. The resulting updated shapefile was reexported to a final shapefile.

Process_Date: 2002

Process_Step:

Process_Description:

To accomodate generation of the Zone level tiling index, additional attributes were added to the index shapefile dbf to indicate of which zone each cell is a member.

Process_Date: 200306

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

The grid defined by this index is a regular grid that does not have any additional or indirect spatial reference.

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Ring composed of arcs

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: Washington, North

Lambert_Conformal_Conic:

Standard_Parallel: 47.500000

Standard_Parallel: 48.733333

Longitude_of_Central_Meridian: -120.833333

Latitude_of_Projection_Origin: 47.000000

False_Easting: 1640416.666500

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: Row and column

Coordinate_Representation:

Abscissa_Resolution: 1

Ordinate_Resolution: 1

Planar_Distance_Units: Survey feet

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983, 1991 Adjustment (HPGN)

Ellipsoid_Name: GRS 80

Semi-major_Axis: 20925604.4720406

Denominator_of_Flattening_Ratio: 298.26

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Shapefile dbf attribute file

Entity_Type_Definition: Index cell identifier and descriptive attributes

Entity_Type_Definition_Source: Software assigned and user indexed

Attribute:

Attribute_Label: tile_id

Attribute_Definition: Five-digit unique integer identifier for each cell

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Unique integer

Attribute:

Attribute_Label: tile_abb

Attribute_Definition:

Unique alphanumeric identifier for each cell comprised of two-character alpha code defining in which spatial column the cell exists cocantenated with a two-digit numeric code defining in which spatial row the cell exists. Alpha portion is uppercase.

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Alpha code

AA04, AA05, BB12, BC16, etc.

Attribute:

Attribute_Label: tile_abblc

Attribute_Definition:

Primary 'colloquial' identifier for each cell identical in value to the tile_abb, but where the alpha portion of the code is lowercase. Unique alphanumeric identifier comprised of two-character alpha code defining in which spatial column the cell exists cocantenated with a two-digit numeric code defining in which spatial row the cell exists.

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Unique alphanumeric code

Attribute:

Attribute_Label: col_abb

Attribute_Definition: Unique alpha identifier for each column, in uppercase.

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain:

Alpha codes beginning with AA and sequencing as AB, AC... AZ, then reinitializing as BA, BB, ... out to the current limit of the defined cells.

Attribute:

Attribute_Label: col_abblc

Attribute_Definition: Unique alpha identifier of each column in lowercase.

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain:

Alpha codes beginning with aa and sequencing as ab, ac... az, then reinitializing as ba, bb, ... out to the current limit of the defined cells.

Attribute:

Attribute_Label: col_id

Attribute_Definition: Three-digit numeric code uniquely identifying each column

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Sequence initiallized at 101 and sequencing as value + 1.

Attribute:

Attribute_Label: row_id

Attribute_Definition: Unique integer identifier for each row

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain:

One or two-digit integer identifier uniquely identifying each row. When cocantenated with column_abb to create tile_abb, the integer is left padded with a zero when necessary to ensure that all tile_abb always contain four characters.

Attribute:

Attribute_Label: area_sqft

Attribute_Definition:

Restating of system-generated area value to provide area value in square feet if shapefile is projected to different system.

Attribute_Definition_Source: user-defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 56250000

Range_Domain_Maximum: 56250000

Attribute:

Attribute_Label: area_sqkm

Attribute_Definition: Area of each cell in square kilometer

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5.225

Range_Domain_Maximum: 5.225

Attribute:

Attribute_Label: area_sqmi

Attribute_Definition: Area of each cell in square miles.

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2.017

Range_Domain_Maximum: 2.017

Attribute:

Attribute_Label: perim_ft

Attribute_Definition:

Restating of system-generated area value to provide area value in square feet if shapefile is projected to different system.

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 30000

Range_Domain_Maximum: 30000

Attribute:

Attribute_Label: perim_m

Attribute_Definition: Perimiter of each cell in meters

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 9144

Range_Domain_Maximum: 9144

Attribute:

Attribute_Label: xmin

Attribute_Definition: Minimum State Plane Washington North Zone Easting

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Integer

Attribute:

Attribute_Label: ymin

Attribute_Definition: Minimum State Plane Washington North Zone Northing

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Integer

Attribute:

Attribute_Label: xmax

Attribute_Definition: Maximun State Plane Washington North Zone Easting

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Integer

Attribute:

Attribute_Label: ymax

Attribute_Definition: Maximun State Plane Washington North Zone Northing

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Unrepresentable_Domain: Integer

Attribute:

Attribute_Label: zonenw

Attribute_Definition:

Defines whether cell belongs to Northwest Zone polygon of idxpzone index

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NW

Enumerated_Domain_Value_Definition: Cell belongs to Northwest Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Enumerated_Domain:

Enumerated_Domain_Value: N

Enumerated_Domain_Value_Definition: Cell does not belong to Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Attribute:

Attribute_Label: zonene

Attribute_Definition:

Defines whether cell belongs to Northeast Zone polygon of idxpzone index

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NE

Enumerated_Domain_Value_Definition: Cell belongs to Northeast Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Enumerated_Domain:

Enumerated_Domain_Value: N

Enumerated_Domain_Value_Definition: Cell does not belong to Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Attribute:

Attribute_Label: zonene

Attribute_Definition:

Defines whether cell belongs to Southeast Zone polygon of idxpzone index

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: SE

Enumerated_Domain_Value_Definition: Cell belongs to Southeast Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Enumerated_Domain:

Enumerated_Domain_Value: N

Enumerated_Domain_Value_Definition: Cell does not belong to Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Attribute:

Attribute_Label: zonesw

Attribute_Definition:

Defines whether cell belongs to Southwest Zone polygon of idxpzone index

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: SW

Enumerated_Domain_Value_Definition: Cell belongs to Southwest Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Enumerated_Domain:

Enumerated_Domain_Value: N

Enumerated_Domain_Value_Definition: Cell does not belong to Zone

Enumerated_Domain_Value_Definition_Source: User-defined

Overview_Description:

Entity_and_Attribute_Overview:

All cells are identified with a several attributes that represent unique row, column and cell identifiers as well as other parameters. As the shapefile serves primarily as a spatial index, the tile_abb and tile_abblc are the primary attributes needed to correctly reference and describe the location of the cell tile.

Entity_and_Attribute_Detail_Citation: None

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dennis Higgins

Contact_Organization:

King County GIS Center, Client Services, Department of Natural Resources and Parks

Contact_Position: Manager, Client Services Division

Contact_Address:

Address_Type: Mailing and physical address

Address: 201 S Jackson St, Suite 706

City: Seattle

State_or_Province: WA

Postal_Code: 98104

Country: USA

Contact_Voice_Telephone: 206-263-4523

Resource_Description: Image/Raster data base spatial index, idxp7500.shp

Distribution_Liability:

King County disclaims any warranty of use of any digital product or data beyond that for which it was designed.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcInfo Shapefile

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: \\gisdw\kclib\plibrary3\reference\indexes

Offline_Option:

Offline_Media: CD-R, DVD+R

Recording_Format: CD: Read-only, DVD: DVD+R read-only

Fees:

Contact KCGIS Client Services <http://www.metrokc.gov/gis/services/> for cost of reproduction and delivery

Metadata_Reference_Information:

Metadata_Date: 20030715

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Michael Leathers

Contact_Organization:

King County GIS Center, Department of Natural Resources and Parks

Contact_Position: GIS Data Coordinator

Contact_Address:

Address_Type: Mailing and physical address

Address: 201 S Jackson St, Suite 706

City: Seattle

State_or_Province: WA

Postal_Code: 98104

Country: USA

Contact_Voice_Telephone: 206-263-4863

Contact_Electronic_Mail_Address: mike.leathers@metrokc.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998