RIGIS03/04 Digital Orthophotos of Rhode Island 2003-2004

Metadata also available as

Metadata:


Identification_Information:

Citation:

Citation_Information:

Originator: Chas. H. Sells Inc

Originator: Rhode Island Department of Transportation

Originator: Rhode Island Geographic Informaiton System

Publication_Date: 20051115

Title: RIGIS03/04 Digital Orthophotos of Rhode Island 2003-2004

Geospatial_Data_Presentation_Form: remote sensing image

Online_Linkage: www.edc.uri.edu

Description:

Abstract:

An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. For this dataset, the natural color orthoimages were produced at 2 foot pixel resolution. Each compressed and mosaiced orthoimage provides imagery for a 20000- by 20000-foot block on the ground. The original projected coordinate system was the Rhode Island State Plane Coordinate System in U.S. Survey feet by RIGIS. There is no image overlap been adjacent files. Images as originally provided were from 1:30000 flight photo scale and reduced to 1:5000 image scale following the scanning and orthorectification process. Map accuracy for 1:5000 scale is plus or minus 3-5 meters. As packaged on CD-ROM media by RIGIS there are three CDs containing the RIGIS03/04 image data set with some overlap to capture entire town areas on one CD. There are 41 year 2003 images on RIGIS03east; 40 year 2004 images and 5 overlapping 2003 images on RIGIS04South; and 36 year 2004 images and 14 overlapping 2003 images on RIGIS04North.

Each compressed mosaiced image in MrSID MG3 format is about 11.75 megabytes in size. When reverted back to full TIF images, a corresponding 4 square mosaic size is about 300 megabytes.

Purpose:

These data have been created as a result of the need for having geospatial data in the form of orthoimagery available for transportation infrastructure inventory and planning.

Supplemental_Information:

Map accuracy for 1:5000 scale is plus or minus 3-5 meters. Since part of the facility to users with computer software is an ability to zoom in or blow up these images and compare them with other data, these accuracy and resolution criteria must be kept in mind while using this product.

Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 20030328

Single_Date/Time:

Calendar_Date: 20030414

Single_Date/Time:

Calendar_Date: 20040408

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Irregular

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -71.6352

East_Bounding_Coordinate: -71.6167

North_Bounding_Coordinate: 41.6344

South_Bounding_Coordinate: 41.6205

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: 2 foot orthoimage

Theme_Keyword: rectified photograph

Theme_Keyword: rectified image

Theme_Keyword: orthophoto

Theme_Keyword: natural color orthophoto

Theme_Keyword: orthoimage

Theme_Keyword: image map

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.

Place_Keyword: US

Place_Keyword: Northeast

Place_Keyword: New England

Place_Keyword: Rhode Island

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard (FIPS) 5-2): Washington, D.C., National Institute of Standards and Technology.

Place_Keyword: RI

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Providence, RI-MA

Access_Constraints:

These data as enhanced by RIGIS in MrSID file format are considered Licensed data when obtained from the RIGIS database and are covered under the limitation of RIGIS licensing agreements

Use_Constraints:

Restictions on use for RIGIS data include limits secondary distribution and requirements for crediting RIGIS as a source as spelled out in sections 1.3, 1.4 and 1.5 of the RIGIS license agreement.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: RIGIS Coordinator

Contact_Organization: RI Department of Administration - DoIT

Contact_Position: RIGIS Coordinator

Contact_Address:

Address_Type: mailing and physical address

Address: RI Department of Administration - RIGIS

Address: One Capitol Hill

City: Providence

State_or_Province: RI

Postal_Code: 02908 5872

Country: US

Contact_Address:

Address_Type: mailing and physical address

Address: The Environmental Data Center

Address: The University of Rhode Island

Address: Coastal Center at Kingston

City: Kingston

State_or_Province: RI

Postal_Code: 02881

Country: US

Contact_Voice_Telephone: 401 222-6483

Contact_Voice_Telephone: 401 874-2180

Contact_Facsimile_Telephone: 401 222-6482

Contact_Electronic_Mail_Address: rigis@admin.ri.gov

Contact_Electronic_Mail_Address: greg@edc.uri.edu

Hours_of_Service: M-F 8-4 EST

Contact_Instructions: email preferred

Data_Set_Credit:

The Rhode Island Department of Transporatation and the Rhode Island Geographic Information System (RIGIS)

Security_Information:

Security_Classification_System: None

Security_Classification: Unclassified

Native_Data_Set_Environment: Digital Orthorectified Imagery

Cross_Reference:

Citation_Information:

Originator: Chas H Sells

Originator: Rhode Island Department of Trnasportation

Publication_Date: 20051128

Title: Digital Orthophotography of Rhode Island 2003 2004

Geospatial_Data_Presentation_Form: remote-sensing image

Other_Citation_Details: Native Tiff Images

Online_Linkage: 158.123.8.8


Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

During photographic reproduction of the source photographs, limited analog dodging (radiometric editing) is performed to improve image quality. Analog dodging consists of holding back light from certain areas of the sensitized photographic material to avoid overexposure. The diapositive is inspected to ensure clarity and radiometric uniformity. Diapositive image brightness values are collected with a minimum of image quality manipulation. Image brightness values may deviate from the brightness values of the original images because of image value interpolation during the scanning and rectification processes. Radiometry is verified by visual inspection of the digital orthophoto with the original unrectified image to determine if the digital orthophoto has the same or better image quality as the original unrectified input image. Slight systematic radiometric differences can be detected between adjacent orthoimage files; these are due primarily to differences in source photograph capture dates and sun angles along flight lines when the aerial photographs were taken. These differences can be observed in an image's general lightness or darkness when it is compared to adjacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adjacent images for better color tone matching.

Logical_Consistency_Report:

During photographic reproduction of the source photographs, limited analog dodging (radiometric editing) is performed to improve image quality. Analog dodging consists of holding back light from certain areas of the sensitized photographic material to avoid overexposure. The diapositive is inspected to ensure clarity and radiometric uniformity. Diapositive image brightness values are collected with a minimum of image quality manipulation. Image brightness values may deviate from the brightness values of the original images because of image value interpolation during the scanning and rectification processes. Radiometry is verified by visual inspection of the digital orthophoto with the original unrectified image to determine if the digital orthophoto has the same or better image quality as the original unrectified input image. Slight systematic radiometric differences can be detected between adjacent orthoimage files; these are due primarily to differences in source photograph capture dates and sun angles along flight lines when the aerial photographs were taken. These differences can be observed in an image's general lightness or darkness when it is compared to adjacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adjacent images for better color tone matching.

Completeness_Report: Complete to publicaiton date

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The locations of surveyed ground control points were compared with their locations on the GeoTIFF images upon which each point appeared. The distance between the ground control point and the orthophoto location was used to calculate a project-wide RMSE value in ground units.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 2

Horizontal_Positional_Accuracy_Explanation:

The location of surveyed ground control points used were compared with their location on the GeoTIFF image upon which each point appeared. The difference in the ground location vs. the orthophoto location was used to calculate a project-wide RMSE value in ground units.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Chas H Sells Inc

Originator: RI Department of Administration

Originator: Rhode Island Geographic Information System

Originator: Rhode Island Department of Transportation

Publication_Date: 20051215

Title: RI Orthoimagery

Edition: 2003/2004

Geospatial_Data_Presentation_Form: remote-sensing image

Publication_Information:

Larger_Work_Citation:

Citation_Information:

Originator: Chas. H. Sells

Originator: Rhode Island Department of Transportation

Originator: Rhode Island Geographic Information System

Originator: Rhode Island Department of Administration - DoIT

Originator: The University of Rhode Island

Publication_Date: 20051115

Title: RIGIS0304 OrthoImagery

Edition: 2003-2004

Geospatial_Data_Presentation_Form: remote-sensing image

Online_Linkage: www.edc.uri.edu/rigis

Source_Scale_Denominator: 30000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 20030328

Single_Date/Time:

Calendar_Date: 20030414

Single_Date/Time:

Calendar_Date: 20040408

Source_Currentness_Reference: ground condition

Source_Contribution: Source imagery for ortho tile production

Process_Step:

Process_Description:

Ground control was from the RIGIS 1997 DEM data set augmented by Chas H Sells to support the accuracy requirements. AeroTriangulation was performed in a softcopy environment. Every exposure was triangulated to meet accuracy requirements. The original RIGIS97 DEMs were used as a base, and modified with additional breaklines where needed to meet the accuracy requirements, or where the terrain had changed.

Process_Date: 20051028

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xmlAF.tmp

Process_Step:

Process_Description:

Original 10000X10000 foot tif image fies were compressed at a 25:1 compression ration and mosaiced into a four square tif to sid image tile MG3 file format with Lizardtech software

Process_Date: 20051128

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: RIGIS Coordinator

Contact_Organization: RI Department of Administration - RIGIS

Contact_Position: RIGIS Coordinator

Contact_Address:

Address_Type: mailing and physical address

Address: RI Department of Administration

Address: One Capitol Hill - RIGIS-

City: Providence

State_or_Province: RI

Postal_Code: 02908 5872

Country: US

Contact_Voice_Telephone: 401 222-6483

Contact_Facsimile_Telephone: 401 222-6482

Contact_Electronic_Mail_Address: rigis@admin.ri.gov

Hours_of_Service: M-F 8-4 EST

Cloud_Cover: 0 percent clouds


Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 10000

Column_Count: 10000

Vertical_Count: 2


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: 3800

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999994

Longitude_of_Central_Meridian: -71.500000

Latitude_of_Projection_Origin: 41.083333

False_Easting: 328083.333333

False_Northing: 0.000000

 

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 2

Ordinate_Resolution: 2

Planar_Distance_Units: survey feet

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000000000000000

Denominator_of_Flattening_Ratio: 298.25722210088


Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Band_1

Attribute:

Attribute_Label: ObjectID

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: Value

Attribute:

Attribute_Label: Count

Detailed_Description:

Entity_Type:

Entity_Type_Label: Band_2

Attribute:

Attribute_Label: ObjectID

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: Value

Attribute:

Attribute_Label: Count

Detailed_Description:

Entity_Type:

Entity_Type_Label: Band_3

Attribute:

Attribute_Label: ObjectID

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: Value

Attribute:

Attribute_Label: Count


Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: RIGIS Coordinator

Contact_Organization: RI Dept. of Administration

Contact_Position: RIGIS Coordinator

Contact_Address:

Address_Type: mailing and physical address

Address: RI Dept. of Administation - RIGIS

Address: One Capitol Hill

City: Providence

State_or_Province: RI

Postal_Code: 02908 5872

Country: US

Contact_Voice_Telephone: 401 222-6483

Contact_Facsimile_Telephone: 401 222-6482

Contact_Electronic_Mail_Address: rigis@admin.ri.gov

Hours_of_Service: 8-4 EST

Contact_Instructions: Email Preferred

Resource_Description: From Rhode Island Geographic Information System

Distribution_Liability: Liability limited by RIGIS License Section 5.0

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 71.564

Fees: CDROM- $50

Ordering_Instructions: email rigis@admin.ri.gov

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: MrSid MG3

Format_Version_Number: MG3

Format_Specification: MrSID MG3

File_Decompression_Technique: LizardTech MG3 25:1

Transfer_Size: 11.74

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: www.edc.uri.edu

Access_Instructions: One time acknowledgement of RIGIS License Required

Offline_Option:

Offline_Media: CDROM

Compatibility_Information: MS Windows OS

Fees: Free Eletronic Download

Ordering_Instructions: www.edc.uri.edu

Technical_Prerequisites:

Image viewing or GIS software capable of reading Lizardtech MrSid MG3 compression format See www.lizardtech.com


Metadata_Reference_Information:

Metadata_Date: 20051115

Metadata_Review_Date: 20051130

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: RI Dept. of Administration

Contact_Person: RIGIS Coordinator

Contact_Position: GIS Manager

Contact_Address:

Address_Type: mailing and physical address

Address: RI Department of Administration - RIGIS

Address: One Capitol Hill

City: Providence

State_or_Province: RI

Postal_Code: 02908-5872

Country: US

Contact_Address:

Address_Type: mailing and physical address

Address: The University of Rhode Island

Address: Environmental Data Center

Address: Coastal Institute at Kingston

City: Kingston

State_or_Province: RI

Postal_Code: 02881

Country: United States of America

Contact_Voice_Telephone: 401 222-6483

Contact_Voice_Telephone: 1-401-874-2180

Contact_Facsimile_Telephone: 401 222-6482

Contact_Facsimile_Telephone: 1-401-874-4561

Contact_Electronic_Mail_Address: rigis@admin.ri.gov

Contact_Electronic_Mail_Address: greg@edc.uri.edu

Hours_of_Service: Monday through Friday 8:00 AM to 4:00 PM (Central Time)

Metadata_Standard_Name: FGDC Content Standard 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_System: none

Metadata_Security_Classification: Unclassified

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile


Generated by mp version 2.8.6 on Fri Nov 18 11:10:24 2005