1、 1 METRIC MIL-PRF-32466 26 June 2013 PERFORMANCE SPECIFICATION SYSTEM SPECIFICATION FOR ENHANCED CONTROLLED IMAGE BASE (ECIB) This specification is approved for use by all Departments and Agencies of the Department of Defense. Comments, suggestions or questions on this document should be addressed t
2、o the National Geospatial-Intelligence Agency, National Center for Geospatial Intelligence Standards (NCGIS), Mail Stop P-106, 12310 Sunrise Valley Drive, Reston, VA 20191-3449, or emailed to ncgis-mailnga.mil. Since contact information can change, you may want to verify the currency of this address
3、 information using the ASSIST Online database at https:/assist.dla.mil/. AMSC N/A AREA GINT DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 2 1. SCOPE 1.1
4、Scope. This specification provides requirements for the preparation and use of the National Geospatial-Intelligence Agencys (NGA) Enhanced Controlled Image Base (ECIB). ECIB files are physically formatted within a National Imagery Transmission Format 2.1 (NITF 2.1) file (MIL-STD-2500C). 1.2 Purpose.
5、 The purpose of this document is to specify the data format and characteristics of ECIB for producers and users. 1.3 Resolution. The Enhanced Controlled Image Base product can be produced at multiple resolutions. The most common resolutions are 0.5, 1, and 5 meter. ECIB will also allow for the optio
6、n of non-standard or native resolution (e.g. airborne sources). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are referenced in sections 3, 4, 5, or 6 of this specification. This section does not include documents cited in other sections of this specification or recommend
7、ed for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, 5 or 6 of this specification whether or not they are listed. 2.2 Go
8、vernment documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. INTERNATI
9、ONAL STANDARDIZATION AGREEMENTS STANAG 2211 Geoid Datums, Spheroids, Grids, and Cell References. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 3 DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-A-89007 ARC Digitized Raster Graphics (ADRG) MIL
10、-PRF-32283 Enhanced Compressed Raster Graphic (ECRG) MIL-PRF-89041 - Controlled Image Base (CIB) DEPARTMENT OF DEFENSE STANDARDS MIL-STD-2414 Bar Coding for Geospatial Products MIL-STD-2500 National Imagery Transmission Format Version 2.1 MIL-STD-600001 Mapping, Charting, and Geodesy Accuracy (Copie
11、s of these documents are available online at https:/assist.dla.mil/online/start.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified
12、, the issues of these documents are those cited in the solicitation or contract. STDI-0002-1 The Compendium of Controlled Extentions for The National Imagery Format (NITF) volume 1,Tagged Record Extentions (TRE) NGA.STND.WGS84.0036 - World Geodetic System 84 NGA.STND.GRIDS.0037 - Datums, Ellipsoids,
13、 Grids, and Grid Reference Systems (Copies of these publications are available online from the National System for Geospatial Inttelligence (NSG) Standards Registry at https:/nsgreg.nga.mil/) N-105-98 - NITFS Standards Compliance and Interoperability Test and Evaluation Program Plan (Copies of this
14、publication are available online from the National Geospatial-Intelligence Agency, NITF Technical Board (NTB) at www.gwg.nga.mil/ntb/baseline/docs/n010598/) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 4 2.3 Non-Government publicatio
15、ns. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents are those cited in the solicitation or contract. ANSI/IEEE Std. 754-2008 IEEE Standard for Binary Floating Point Arithmetic ANSI/IEEE 1003.1 Portable Opera
16、ting System Interface for Computer Environments (POSIX) (Copies of these publications are available from the American National Standards Institute (ANSI) at http:/webstore.ansi.org/ansidocstore) ISO 9660:1988 Information Processing, Volume and File Structure of Optical Data Discs (CD-ROM) for Inform
17、ation Interchange. ISO/IEC 10149:1995 Information Technology Data Interchange on Read-Only 120 mm CD-ROM ISO/IEC 16448:2002 Information Technology 120 mm DVD Read-only disk ISO/IEC 13346 Parts 1-5 Volume and File Structure of Write-Once and Rewriteable Media Using Nonsequential Recording (NSR) for I
18、nformation Interchange ISO/IEC 15444-1:2004 Information Technology - JPEG 2000 image coding system: core coding system (Copies of these publications are available from the International Organization for Standardization (ISO) at http:/standards.iso.org/ittf/PubliclyAvailableStandards/index.html and h
19、ttp:/www.iso.org/iso/en/prods-services/ISOstore/store.html) BPJ2K01.10 ISO/IEC BIIF Profile for JPEG2000, Version 01.10 (Copies of this publication are available online from the National Geospatial-Intelligence Agency, NITF Technical Board (NTB) at www.gwg.nga.mil/ntb/baseline/documents.html) Provid
20、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 5 ESRI Shapefile Technical Description An ESRI White Paper July 1998 (Copies of this publication are available from Adobe at http:/ Extensible Markup Language (XML) 1.0 (Third Edition) (Copies o
21、f this publication are available at http:/www.w3.org/TR/2004/REC-xml-20040204/) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. In order to minimize potential conflicts within this docu
22、ment and associated references the document was validated using the 5-step Standards Validation testing approach as set forth in section 2.0 of NITFS Standards Compliance and Interoperability Test and Evaluation Program Plan, N-0105/98. Following the procedures set forth in N-0105/98 will provide a
23、high degree of confidence that the document is technically correct, consistent, complete, testable and implementable, prior to fielding by developers. 3. REQUIREMENTS 3.1 First article. When specified, a sample shall be subjected to first article inspection in accordance with 4.2 (First article insp
24、ection). The sample shall be inspected and approved under appropriate provisions of the production contract. The contracting officer shall specify the appropriate type of first article and the number of units to be furnished. The contracting officer shall also include arrangements for selection, ins
25、pection, and approval of the first article. 3.2 Horizontal Accuracy. a. The horizontal accuracy of ECIB data depends on the accuracy of the imagery support data of the sensor capturing the image source from which the ECIB was derived and the accuracy of the digital elevation model (DEM) used to orth
26、orectify the image. The horizontal accuracy attribute within the ECIB frame file defines the accuracy for each areal extent. Each Areal extent is defined as a singular image and DEM extent. 3.3 The absolute horizontal accuracy is listed in the AAH field of the ACCHZB extension for the particular ima
27、ge source utilized in production. The relative horizontal accuracy is Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 6 listed in the APH field of the ACCHZB extension. Accuracies shall be determined relative to a 90% Circular Map Accur
28、acy. The accuracy error attributable to compressing the ECIB data contributes insignificantly to the total accuracy of the product. 3.4 Vertical Accuracy. Vertical Accuracy is not applicable to this product specification. 3.5 Resolution. The spatial resolution of the ECIB data depends on the spatial
29、 resolution of the image source from which the product is derived and any processing steps which affect the resolution or GSD. Note that in this specification, the terms “GSD“ and “resolution“ are used interchangeably. The spatial resolution of the ECIB product shall be produced based on source data
30、 and customer requirements. 3.6 Horizontal Datum. The horizontal datum for ECIB shall be WGS-84, as defined by the NSG Standard. 3.7 Product Description. The ECIB products shall conform to this specification. The processing of ECIB includes Joint Photographic Experts Group (JPEG) 2000 compression. E
31、CIB images may be monochromatic or multispectral. Images will be processed into an ECIB product with a specified resolution which will be reflected in the NGA Reference Number (NRN) for the product. 3.8 ECIB Exchange media and recording formats. The primary exchange media shall be Digital Versatile
32、Disc (DVD) or blu-ray discs. In addition, the products may be distributed on the NGA Joint Worldwide Intelligence Communication System (JWICS), Secret Internet Protocol Router Network (SIPRnet), and Non-classified Internet Protocol Router Network (NIPRnet), among other current and future media. Many
33、 of the current media standards, listed in Table I, and recording format standards for these media are as specified in this document. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 7 TABLE I. ECIB media standards Interchange Media Reco
34、rding Standard Volume/File Structure DVD UDF v1.5 Blu-Ray UDF v1.5 NIPRNet FTP/HTTP SIPRNet FTP/HTTP JWICS FTP/HTTP Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 8 3.8.1 Source Imagery. a. ECIB will be produced directly from source im
35、ages and reformatted into an ECIB frame file structure. ECIB files will be physically formatted within the NITF product. b. Each ECIB interchange column contains compressed, transformed images from multiple source images. The source data for ECIB production are digital satellite images processed to
36、a standard spatial resolution. Applicable ancillary information (e.g., image source, accuracy) included with the source image at the time of ECIB production are included in the NITF metadata of the frame file and shapefile attributes. Source imagery data that are more recent than the current version
37、 of a frame file or contain data that are of higher quality (e.g., less cloud cover) are candidates for ECIB update data. 3.8.2 Projection system. The Equal Arc-Second Raster Chart (ARC) system, as described in MIL-A-89007, divides the surface of the earth ellipsoid into 18 latitudinal bands called
38、zones. Zones 1-9 cover the Northern hemisphere and zones 10-18 (labeled A through J, exclusive of I) cover the Southern hemisphere. One zone in each hemisphere covers the polar areas. Each non-polar zone covers a part of the ellipsoid between two latitude limits and completely encircles the Earth. T
39、he nominal zone limits for ECIB are listed below in Table II. The extents of the ECIB zone overlaps are defined in Tables A-VI, A-VII, and A-VIII of Appendix A. TABLE II. ECIB zone limits Zone Number Equatorward Latitude Midpoint Latitude Poleward Latitude 1,A 0 22.94791772 32 2,B 32 41.12682127 48
40、3,C 48 52.28859923 56 4,D 56 60.32378942 64 5,E 64 66.09421768 68 6,F 68 70.10896259 72 7,G 72 74.13230145 76 8,H 76 78.17283750 80 9,J 80 90 3.8.3 Distribution frames. The ECIB database is composed of rectangular grids of frames of pixels for each zone Provided by IHSNot for ResaleNo reproduction o
41、r networking permitted without license from IHS-,-,-MIL-PRF-32466 9 and can be distributed with contiguous or non-contiguous coverage. Each frame is represented by a discrete file. 3.8.4 Imagery seams. ECIB is designed to be seamless. Seamless is generally interpreted to allow a “shear“ of one pixel
42、 or less of horizontal displacement. One pixel of shear is desireable, but often not attainable without significant manual effort. Therefore this is not to be interpreted as an absolute requirement. Actual allowable shear in an ECIB will be determined by separate production guidance. Source images a
43、re indistinguishable except where shear and/or shifts in pixel values occur as a result of inconsistencies in source imagery collection parameters (e.g., gain values set differently, images collected on different dates.) Processing of the source imagery into ECIB will include a brightness and/or con
44、trast adjustment in order to minimize such differences; however, it typically will not be possible to eliminate all visual differences between mosaicked images. ECIB image data from adjacent frames abut exactly to provide unbroken coverage. However, gaps in coverage may occur as a result of incomple
45、te source image data. In the case where source imagery is extremely dark or light (e.g., contains features that are unrecognizable), data will be enhanced such that contrast will be heightened over large areas and features are recognizable without further enhancement by the user. No artificial seams
46、 (i.e., along geocell or frame boundaries) will be introduced to data during processing from source to final ECIB product except in the case along the degree boundary where an adequate DEM is not available for the adjacent cell. At a minimum, ECIB producers should present their approach to both radi
47、ometric balancing and contrast enhancement for review before production begins. 3.8.5 Data file organization. ECIB data files are arranged in a hierarchical directory/subdirectory structure (see Figures 1 and 2). The ECIB directories and data files, enumerated below, are fully described in paragraph
48、s 3.7.5.a through 3.7.5.g. Any computer system that can access distribution media conforming to the standards listed in Table I should be able to access ECIB data. a. Root Directory: Enhanced Product Format (EPF) directory is the root. EPF directory contains table of contents file, one or more directories of frame files. The root directory shall be named “EPF”. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32466 10 (Level 0) EPF EPF root
