ImageXX.tif - DAIS Color Infrared 8-bit Aerial Photography

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: King County
Publication_Date: 20010511
Title: ImageXX.tif - DAIS Color Infrared 8-bit Aerial Photography
Edition: One
Geospatial_Data_Presentation_Form: Raster Image
Publication_Information:
Publication_Place: King County, WA
Publisher: King County
Other_Citation_Details:
This dataset was collected as part of a larger multispectral image acquisition contracted through Pacific Meridian Corporation, a subsidiary of Space Imaging, Inc. The DAIS (Digital Airborne Imagery System) component is one of Space Imaging's Caterra products. Licensing and use restrictions are part of this acquisition contract. Please contract the Point of Contact for licensing restrictions.
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator: King County
Publication_Date: 2000
Title: ESA/SAO Multispectral Image Acquisition
Publication_Information:
Publication_Place: King County, WA
Publisher: King County
Online_Linkage:
Description:
Abstract:
Color Infrared version of low elevation, high resolution (i.e., small ground sample distance (GSD)) aerial photography collected in September 2000 for Vahson and Maury Islands. portions of King County that reside in Puget Sound, approximately 5 miles west of the city of Seattle.The data has a pixel size of 0.5 meters and is displayed in color infrared for 'false color' viewing and analysis.
Purpose:
The image dataset comprises 25 individual image tiles stored in TIFF format that can be displayed as a single seamless mosaic. The original imagery was 12-bit, 4-band multispectral data. This dataset is a conversion of the original to 8-bit, 3-band data (red band omitted) that is more easily viewed with common software than the original multispectral data. The imagery, within the horizontal accuracy and resolution limitations, serves as digital backdrop imagery for GIS analysis and cartographic display. This 'false color' format displays the infrared band by default making it useful for visual analysis of vegetative vs non-vegetative characteristics. However the data is not intended to be used for true multispectral analysis as it is missing the one band and is of lower dynamic range than the original data. Absolute and relative horizontal accuracy of the data should be carefully considered when either determining coordinate positions or when applying the data relative to other spatial datatsets.
Supplemental_Information:
The images can be accessed as individual TIFFs tile by tile or as a pseudo-mosaic by using the associated image catalog dbase file (dais_cir.dbf). Some of the images demonstrate some spectral balance variation, especially where there is a large amount of water in the image. This appears to be due to the way the display look-up table handles the display contast. Additional adjustments may be made to this data in future to improve the display chararcteristics. The TIFF format, though most appropriate for ArcView viewing, do not display properly in ArcView Image Analyst due to a bug in the way Image Analyst reads the Geotiff header. For this reason it is not recommended that this imagery be viewed or analyzed in Image Analyst. This projection read error is also documented in Erdas although there is a patch fix to take care of this. Users who wish to take advantage of the full multispectral characteristics of the DAIS imagery are encouraged to use the true multispectral version of the data, ms16xx.img
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20000923
Ending_Date: 20000923
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.5384
East_Bounding_Coordinate: -122.3411
North_Bounding_Coordinate: 47.5334
South_Bounding_Coordinate: 47.3111
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: color infrared imagery
Theme_Keyword: 'false color'
Theme_Keyword: aerial photography
Theme_Keyword: Space Imaging
Theme_Keyword: Caterra
Theme_Keyword: DAIS
Theme_Keyword: Digital Airborne Imagery System
Theme_Keyword: multispectral
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: King County (Vahson/Maury Islands)
Place_Keyword: Washington
Place_Keyword: Pacific Northwest
Place_Keyword: Pacific NW
Access_Constraints: Online access is restricted to King County GIS users
Use_Constraints:
King County digital data may not be reproduced or redistributed without the express written authorization of the King County Department of Information and Administrative Services. Specfic constraints apply per the licensing agreement with Space Imaging.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: King County Department of Natural Resources
Contact_Person: Michael Leathers
Contact_Position: GIS Database Administrator
Contact_Address:
Address_Type: mailing and physical address
Address: 201 S. Jackson St, Ste 700
City: Seattle
State_or_Province: WA
Postal_Code: 98104
Country: USA
Contact_Voice_Telephone: 206-296-3775
Contact_Facsimile_Telephone: 206-296-3749
Contact_Electronic_Mail_Address: mike.leathers@kingcounty.gov
Hours_of_Service: 8:00-4:30 PST M-F
Native_Data_Set_Environment:
ArcView 3.2, ArcInfo 7.x \\wildfire\plibrary2\images\dais\cir\imageXX.tif
Data_Quality_Information:
Attribute_Accuracy:
Completeness_Report:
The imagery covers the full extent of Vashon and Maury Islands. There are no breaks in the tiling scheme or the imagery. The littoral zone is captured around the entire land mass. The amount water buffer captured varies from a minimum of approximately 0.1 mile to about 0.6 miles. This generally provides adequate coverage of the land/water transition zone for display and analyses requirements.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The raw images were geogrectified by the vendor using available 10 m DEM supplemented by limited GPS ground control. After delivery of the tiled images, in-house horizontal accuracy analysis indicated that the data met or exceeded the contract specification for NMAS 1:10000 (CE90 of 4m (13.1ft)). The number of known ground control locations for confirmation was very small (9) and three of the locations were not discernable on the imagery. For the remaining six discernable points the horizontal offset between the imagery and the known control points ranges from 1 to 2 meters. Initial review indicates that the data exhibits this level of accuracy relatively evenly over the area of interest without significant skewing.
Vertical_Positional_Accuracy:
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date:
Edition:
Geospatial_Data_Presentation_Form: image
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
Publisher:
Online_Linkage:
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Process_Step:
Process_Description:
The images were received from the vendor on CDROM as 4-band (blue, green, red, near infrared) TIFF files in 12-bit (stretched to 16-bit) format. Twenty-five (25) tiles (files) were delivered. The original file name was in the format LLWWWCR where LL was the latitude of the SE corner of the the tile, WWW was the longitude of the SE corner of the tile, C was an arbitrary column letter and R was an arbitrary row number. To maintain consistency with the other datasets in this project, the tiles (files) were renamed to a sequential numbering order from 1 through 25, corresponding to the edited spatial index. The tile numbers were prefaced with 'ms16' to indicate that they were the raw 16-bit multispectral image files.
Source_Used_Citation_Abbreviation: 47122G6.tif
Process_Date: 200012
Source_Produced_Citation_Abbreviation: ms16XX.tif
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Michael Leathers
Contact_Organization: King County Department of Natural Resources
Contact_Position: GIS Database Administrator
Contact_Address:
Address_Type: mailing and physical address
Address: 201 S. Jackson St, Ste 700
City: Seattle
State_or_Province: WA
Postal_Code: 98104
Country: USA
Contact_Voice_Telephone: 206-296-3775
Contact_Facsimile_Telephone: 206-296-3749
Contact_Electronic_Mail_Address: mike.leathers@kingcounty.gov
Hours_of_Service: 8:00-4:30 PST M-F
Process_Step:
Process_Description:
The original 16-bit images do not display nor are able to be manipulated in ArcInfo and ArcView software without special extensions. To create a version of the data for 'False Color' Infrared viewing that could be viewed without specialized software, a proprietary application supplied by Space Imaging called 'make8bit' was used.This application performed a color-balanced conversion of the data by decreasing the dynamic range from 16 to 8 bits and omitting the red band. This created a blue (3),green(2),NIR(1) 3-band image that defaults to NIR band display order in ArcView.
Source_Used_Citation_Abbreviation: ms16xx.tif
Process_Date: 200101
Source_Produced_Citation_Abbreviation: imagexx.tif
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Michael Leathers
Contact_Organization: King County Department of Natural Resources
Contact_Position: GIS Database Administrator
Contact_Address:
Address_Type: mailing and physical address
Address: 201 S. Jackson St, Ste 700
City: Seattle
State_or_Province: WA
Postal_Code: 98104
Country: USA
Contact_Voice_Telephone: 206-296-3775
Contact_Facsimile_Telephone: 206-296-3749
Contact_Electronic_Mail_Address: mike.leathers@kingcounty.gov
Hours_of_Service: 8:00-4:30 PST M-F
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 7091 (representative)
Column_Count: 4898 (representative)
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
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:
Planar_Distance_Units: Feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS 80
Semi-major_Axis: 20925604.4720406
Denominator_of_Flattening_Ratio: 298.26
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
The imagery are stored as raster TIFF format files. They have no attribute tables. Information regarding the collection parameters for the imagery may be found in the metadata for the multispectral version of this dataset as well as in the metadata for the spatial index for this dataset - idxpdais.shp
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: King County
Contact_Person: Cheryl Wilder
Contact_Position:
Contact_Address:
Address_Type: mailing and physical address
Address: 700 5th Ave., Ste 2300
City: Seattle
State_or_Province: WA
Postal_Code: 98104
Country: USA
Contact_Voice_Telephone: 206-263-5220
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: cheryl.wilder@kingcounty.gov
Hours_of_Service: 8:00-5:00 PST M-F
Resource_Description:
imageXX.tif where XX references a tile-id linked to a single polygon location in idxpdais.shp index scheme. The domain of the the tile_id is 1 through 25.
Distribution_Liability:
The King County Department of Information and Administrative Services disclaims any warranty of use of any digital product beyond that which it was designed.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF image format
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Metadata_Reference_Information:
Metadata_Date: 20010511
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: King County Department of Natural Resources
Contact_Person: Michael Leathers
Contact_Position: GIS Database Administrator
Contact_Address:
Address_Type: Mailing and physical address
Address: 201 S. Jackson St, Ste 700
City: Seattle
State_or_Province: WA
Postal_Code: 98104
Country: USA
Contact_Voice_Telephone: 206-296-3775
Contact_Facsimile_Telephone: 206-296-3749
Contact_Electronic_Mail_Address: mike.leathers@kingcounty.gov
Hours_of_Service: 8:00-4:30 PST M-F
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
City: Seattle
Country: US
City: Seattle
Country: US
City: Seattle
Country: US
City: Seattle
Country: US
City: Seattle
Country: US
Generated by mp version 2.9.6 on Wed Apr 10 12:31:44 2013