MIL-PRF-89041 Controlled Image Base \(Cib\)This specification provides requirements for the preparation and use of the Raster Product Format \(RPF\) Controlled Image Base \(CIB\) data. CIB is a dataset of orthophotos, made from rectified grayscale aerial images. CIB supports various weapons, C3I theater battle management, mission planning, digital moving map, terrain analysis, simulation, and intelligence systems. CIB data are produced from digital source images that can be converted to meet the requirements of this CIB specification at one of the registered resolutions defined in MIL-STD-2411-1. CIB data are derived directly from digital images and are compressed and reformatted to conform to the RPF Standard. CIB files are physically formatted within a National Imagery Transmission Format \(NITF\) message.

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MIL-PRF-89041A

b. [table of contents file]: The [table of contents file]

provides an overview of the data contents of the distribution

media. The [frame file index section] within the [table of

contents file] provides path names to each of the [frame file]s

on the interchange volume. The path names to the [frame file]s

will be used by user applications software to locate the [frame

file]s.

c. [frame file directory]s: CIB producers will choose the

number of [frame file directory]s in a given volume and

convention for assigning [frame file]s to directories. Each of

the [frame file directory]s on a given interchange volume shall

be uniquely named in a manner to be determined by an authorized

producer. The producers may also assign nested [frame file

directory]s as needed to organize the [frame file]s, using a

variable hierarchy.

d. [frame file]s: The [frame file]s contain the tiled

image and support data for the geographic frames on a CIB

interchange volume. A CIB [frame file] includes all NITF and RPF

components. Each [frame file] shall include a [header section],

[location section], [coverage section], [compression section],

[color/grayscale section], [image section], optional [attribute

section], [related images section] and [replace/update section]

(only present for replacements and updates). The [frame file]

naming convention shall be in accordance with MIL-STD-2411, and

is described in the APPENDIX, Section A.3.6.

e. [Overview image]s: (Optional)[overview images] may be

provided on CIB interchange media. These indicate graphically

where the [frame file]s are located with respect to political and

ocean boundaries, similar to the Location Diagram on the jewel-

box liner. [Overview image]s will be at the same level on the

media as the [table of contents file]. Each [overview image]

shall include a [header section], [location section],

[compression section], [color grayscale section], and [image

section].

f. [Read Me/Metadata File]: NIMA is resolving issues

associated with the Executive Order issued on the "Content

Standards for Digital Geospatial Metadata". This document is

published by the Federal Geographic Data Committee and describes

all types and formats of metadata. In conjunction with this

metadata file, a READ ME file required by the Defense Information

Systems Agency is in work. NIMA will provide amendments to this

specification in the form of change pages at a later date to

describe the metadata file and the READ ME file.

3.4.6 Data formats. Data recording shall adhere to the

conventions for logical data recording formats as specified in

section 4.4 of MIL-STD-2411, and formatted within an NITF message

conforming to MIL-STD-2411-2.

3.5

Frame and subframe structure.