DOD MIL-G-89106-1994 GRIDDED AIRFIELD PHOTOGRAPHS (GAP)《机场网格照片(GAP)》.pdf
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1、MIL-G-89LOb W 9999906 L9772LL 933 1 METRICI MIL-0-89106 SUPERSEDING PS/4BF/300 NOVEMBER 19 9 1 - MILITARY SPECIFICATION GRIDDED AIRFIELD PHOTOGRAPHS (GAP) Thie specification ie approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 ,SCOD. These specifications are
2、 for use by all Department of Defense activities which have authorization to validate Mapping, Charting and Geodesy requirements and submit production requests. 1.2 mnose. These specifications are designed to provide guidelines for the preparation, acquisition, handling, and destruction of hardcopy
3、Gridded Airfield Photographs. generated f, th:se specifications may be classified as high as “SECRET“. Destruction notice for unclassified, distribution limited documents: “Destroy by any method that will prevent disclosure of contents or reconstruction of this document“. 1.3 ri . These specificatio
4、ns are UNCLASSIFIED. Products 0 2. APPLICABLE DOCUMENTS This section is not applicable to this specification. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, Defense Mapping Agency, AT
5、TN : PR, ST A-13, 8613 Lee Highway, Fairfax, VA, 22031-2137 by using the Standardization Document Improvement Propoeal (DD Form 1426) appearing at the end of thie document or by letter. AMSC N/A AREA MCGT BUTION STATEMENT A. Not approved for public release; distribution is limited. Provided by IHSNo
6、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIL-G-89LOb 9999906 L9772L2 8T W MIL-G-89106 3. REQUIREMENTS 3.1 mst article . When specified (see 6.21, a sample shall be subjected to first article inspection (see 6.3) in accordance with 4.3. 3.2 Bccuracv. 109 feet C
7、ircular Error (CE) (90 percent assurance). 3.3 product ident ifier. Each GAP will be identified by installation name, coordinates, country name (country code) , and BE number (if available). Each sheet necessary to provide coverage of a site will have an individual stock number. 3.4 product attribut
8、es. 3.4.1 productio n. The GAP will normally be produced by plane rectification of latest date suitable source materials available to DMA. A plane rectification, which removes image projection distortions due to camera roll, pitch and yaw, is a suitable procedure for producing GAPs since airfields a
9、re essentially located on level terrain and there is little or no image distortion due to terrain relief. 3.4.2 Orthorect ified imaaerv . Under some circumstances, there may be a valid requirement to produce a GAP in an area where terrain relief is greater than would normally be expected at an airfi
10、eld. In that circumstance, if the combination of relief and image obliquity angle results in a theoretical absolute horizontal error greater than 109 feet CE, that airfield/installation will be considered a candidate for production using orthorectified imagery. formal decision to produce or not to p
11、roduce. DMA(PR) will coordinate with the requesting customer and determine if the candidate GAP, using orthorectified imagery, will meet the requesting customers requirements. Each such candidate GAP will be referred to DMA(PR) for 3.4.3 Source mater ia1 date . Source materials older than three year
12、s will not be used. three years to insure currency of detail. Maintenance updates should be prioritized with new area requirements and submitted when operational use of the data has been seriously degraded by major changes to the primary movement surfaces of the airfield. GAPs should be evaluated ev
13、ery * 3.4.4 Scale. GAPS will normally be produced at a scale of 1:6,000. Although multiple GAPs will be used to provide complete coverage of the area of interest, alternative scales may be available to accommodate large areas. These instances will be thoroughly reviewed by DMA and the requesting com
14、mand on a case by case basis. NOTE: Scale changes may affect grid spacing and product accuracy evaluation. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-G-89IIOb 99999Ob II977213 706 MIL-G-89106 3.4.5 . The geodetically controlled latitude an
15、d longitud?ldiDwnormally be plotted at 0.02 arc min. intervals. This interval results in a grid spacing of 120 feet in latitude and a variable spacing in longitude. The grid will carry index values at 0.20 min. intervals. 3.4.6 Overuted arid . Placement of overprinted grid must permit determination
16、of WGS 84 horizontal coordinates accurate to 109 feet CE where terrain is essentially level. 3.5 mruin Information . The following information will be carried in the GAPS margin or in an area of the GAP that does not obscure the airfield. a. Installation name, country code, and BE number (if availab
17、le). b. DMA credit note, production date, and month/year of source. c. Statement of coordinate units (degrees, minutes, hundredths of minutes). d. Estimated absolute horizontal accuracy, at 90%, in feet and relative to WGS 84. e. Elevation values in feet, relative to MSL, for center 0 of parking apr
18、on, and center and endpoints of each runway. 1. If multiple parking aprons are requested each will be identified by an alpha character on the image and will be keyed similarly to a list of elevations in the margin. 2. Runway elevation values will be listed by runway numbers in the margin. f. Graph b
19、ar scale in feet and meters and scale statement. g. Classification control note and declassification note. h. Stock Number. Each sheet produced will have its own unique stock number. When used alone the stock number, or list of stock numbers, is unclassified. Column Explanation 1-2 Program. GP, Grid
20、ded Photographs 3-5 Product. GAP, Gridded Airfield Photograph 6 Producer code. “A“ DMA Aerospace Center 7-11 Sequential stock (site) number (00000-99999) 12-13 Sheet numbers, a site may have multiple sheets 14 Slash (/I 15 Edition number (1 - 9) 3 Provided by IHSNot for ResaleNo reproduction or netw
21、orking permitted without license from IHS-,-,-MIL-G-89106 9999906 1977214 b42 MIL-G-89106 3.6 Fvaluation Drocedures . Should product evaluation procedures indicate an accuracy worse than 109 feet at 90% reliability, DMA(PR) will coordinate with the customer to determine if the product is usable, wil
22、l list the product as being inadequate, and will schedule the product for maintenance. 3.7 Size. Maximum size of the GAP is 24 inches x 30 inches (60.96 X 76.20 centimeters). If more than one sheet is required to cover large airfields, the maximum size of any sheet will be 24 inches X 30 inches (60.
23、96 X 76.20 centimeters). 3.8 BeDroduW . Reproduction of GAPs will be accomplished by standard quality photographic processing. a. Photographic copies will be produced flat for distribution unless the print quantity requirement exceeds 200. Over 200, lithographic copies will be produced and the user
24、must specify “flat“ or “folded“, the latter being an eight panel fold. b. Duplicate negatives, including overprinted grid and textual information, will be provided to the customer upon request. 3.9 pistributio * n (u nl ess ot herwise reauested). -1 3.9.1 Jnitial D roduc t ion . Requests for new pro
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