Section 129.13. Specifications.

 

(1)   General.

(a) Contracts between the grantee and the mapping consultant, and between the mapping consultant and subcontractors, if any, shall conform to the minimum mapping specifications set forth in this section, unless par. (b) is applicable.

(b) If the department determines that compliance with the specifications of this section would be impractical in specific cases, it may approve alternative specifications which, in its opinion, represent a reasonable approach to achieving the desired end product.

(c) The maps, aerial photographs and negatives, and all other data developed as part of the mapping project shall be considered public records and shall be made available for public inspection.

(2)   Ground control.

(a) Records. It shall be the grantee's responsibility to make known to the mapping consultant all existing monumentation and to furnish the consultant with existing local unpublished survey data of the required order of accuracy or better.

(b) Control report. The consultant shall prepare and furnish to the grantee a bound control report providing all data pertaining to the project survey control. The report shall contain:

1. A narrative, outlining survey methods used and applicable survey instrumentation and computational and adjustment procedures utilized;

2. The closure and adjustment computations and original field note books for horizontal and vertical control;

3. Sketches, descriptions, elevations and state plane coordinates of all existing and newly established recoverable control; and

4. A scale control diagram summarizing the existing project survey control utilized for origin and closure purposes, along with the relationship to newly established recoverable horizontal and vertical control.

(c) Vertical control. The consultant shall perform necessary field surveys to maintain full model vertical ground control with all elevations referred to national geodetic vertical datum of 1929. Third-order accuracy is required and shall conform to national geodetic survey specifications. There shall be enough ground-surveyed bench marks such that no point within the flood plain or shoreland area will be greater than 3000 feet from a described and recoverable bench mark. No analytical aerotriangulation for vertical mapping control shall be accepted unless it is otherwise impractical to gain physical or legal access.

(d) Horizontal control. The consultant shall perform horizontal control surveys to obtain third-order, class I accuracy and shall conform to national geodetic survey specifications. The horizontal control survey shall be based on the state plane coordinate system and shall originate and end on the basic control for which closures are known and available, or shall be run to make a closed and checked circuit. Analytical aerotriangulation for horizontal mapping control is acceptable.

(e) Specifications for vertical and horizontal control have been prepared and published by the U.S. department of commerce in the following publications:

1. "Classifications, Standards of Accuracy, and General Specifications of Geodetic Control Surveys" reprinted January 1979; NTIS accession no. PB265442.

2. "Specifications to Support Classification, Standards of Accuracy, and General Specifications of Geodetic Control Surveys" reprinted January 1979; NTIS accession no. PB261037.

(3)   Aerial photography.

(a) Camera. Photography shall be exposed with a 6-inch focal length lens to produce negatives 9¿9 inches in size. The camera used and its designated companion film magazine must have been certified by the U.S. geological survey or the manufacturer within 3 years prior to the date of the grant application.

(b) Scale. Photography shall be obtained from a flight height chosen by the mapping consultant so that the specified contour interval accuracy is assured. However, flight height greater than 4800 feet above mean floodplain elevation is unacceptable for use with an optical-mechanical stereoplotter, and flight height greater than 3000 feet above mean floodplain elevation is unacceptable with a projection type stereoplotter. Negatives which have a departure from the intended scale of photography exceeding 5% may be rejected.

(c) Overlap. Overlap shall be sufficient to provide full stereoscopic coverage of the complete area to be mapped. The endlap shall average 60%, with side lap not less than 20% or more than 55%.

(d) Tilt. Tilt of any negative by more than 3 ° , an average tilt of more than one degree for the entire project, or tilt between any 2 successive negatives exceeding 4 ° may be cause for rejection.

(e) Crab. Crab in excess of 3 ° may be cause for rejection of the flight line of negatives or portions thereof in which such crab occurs.

(f) Quality. Photography shall be clear and sharp in detail and of average uniform density. It shall also be free of clouds, cloud shadows, light streaks, static marks or other blemishes which would interfere with its intended use. All photography shall be taken when the area to be mapped is free of snow, with the water confined to the main low water channel, before foliation, and at such time as to insure a minimum solar angle of 30 ° .

(g) Contact prints. Contact prints from the vertical negatives shall be printed on double weight, semi-matte paper of suitable contrast.

(h) Photo index. Photo indices shall be prepared by directly photographing on safety base film, at a convenient scale, the assembly of contact prints from all indexed and evaluated prints and shall be reproduced on dimensionally stable polyester base material. The photo index map shall carry a suitable title, scale, and north point.

(4)   Map accuracy.

(a) Contours.

1. Ninety percent of the elevations determined from the solid-line contours of the topographic maps shall have an accuracy with respect to true elevation of 1 / 2 contour interval or better, and no such elevations shall be in error by more than one contour interval.

2. In each particular area where the intermediate contours have been omitted due to the steepness of the ground slopes, and only the index contours are delineated on the maps, the accuracy stipulations apply to the contour interval of the index contours.

3. In densely wooded areas where heavy brush or tree cover fully obscures the ground and the contours are shown as dashed lines, the contours shall be plotted as accurately as possible from the stereoscopic model, while making full use of spot elevations obtained during ground control surveys and all spot elevations measured photogrammetrically in places where the ground is visible.

(b) Spot elevations. Ninety percent of all photogrammetrically determined spot elevations shall have an accuracy with respect to true elevation of 1 / 4 contour interval or better, and no such elevations shall be in error by more than 1 / 2 contour interval.

(c) Coordinate grid lines. Each coordinate grid line or tick shall be plotted on the finished map sheets within 1 / 100 of an inch of the true grid values.

(d) Horizontal control. Each horizontal control station and section corner shall be plotted on the finished map sheets within 1 / 100 of an inch of its true position as expressed by the adjusted coordinates computed for the point.

(e) Planimetric features.

1. Ninety percent of all well-defined planimetric features on the photographs shall be plotted so that their position on the finished maps shall be accurate to within 1 / 40 of an inch of their true coordinate position and no point shall be misplaced on the finished map by more than 1 / 20 of an inch from its true position.

(5)   Topographic maps.

(a) Coordinate grid. Grid line intersections of the state plane coordinate system shall be shown on the finished map(s) together with corresponding coordinate values. Spacing of these lines shall be 5 inches.

(b) Match lines. Match lines shall be provided for the map sheets so that each sheet may be joined accurately to those adjacent to it.

(c) Planimetry.

1. The map(s) shall contain all planimetric features which are visible from the aerial photography, including land use features such as, but not limited to, buildings, canals, ditches, reservoirs, trails, roads, highways, railroads, ferry slips, fords, quarries, borrow pits, cemeteries, orchards, boundaries of wooded areas, fence lines and individual, lone, large trees that can be recognized as such. Structures, such as bridges, trestles, tunnels, piers, retaining walls, dams, power plants, transformer and other substations, transportation terminals and airfields, storage tank fields, and the like, shall also be shown.

2. Buildings and similar dimensionable objects shall be correctly outlined and oriented on the maps, and shall be to actual scale, except those building dimensions smaller than representable by 1 / 20 inch in size. Minor irregularities in building outlines that are not representable by 1 / 40 inch at map scale shall be ignored.

3. Township, range, and section lines; and city, town, county, and political subdivision lines shall be obtained by the consultant from the municipality or other available sources and identified on the map(s).

(d) Spot elevation.

1. Spot elevations determined photogrammetrically or by field survey shall be shown on the maps in proper position at water level on the shoreline of lakes, reservoirs, ponds and the like; on hilltops; in saddles; at the bottom of depressions; at the intersection of well-traveled roads, principal streets in cities, railroads, and highways; and on the centerline at each end of bridges and like locations where such elevations are significant.

2. In areas where the contours are more than 3 inches apart at map scale, photogrammetric spot elevations shall also be shown to adequately depict the ground configuration.

(e) Topography.

1. Unless otherwise stipulated in special provisions, the maps shall contain all representable and specified topographic features which are visible from the aerial photography.

2. Contours shall be delineated to represent true elevation above mean sea level and the exact shape of the ground. Every fifth contour shall be accentuated and numbered.

3. Wherever they exist, hydrographic features required on the maps shall include all watercourses which are longer than one inch at map scale, and all ponds, lakes, flowages and wetlands.

4. Floodplain, floodway and shoreland limits shall be shown on the finished map sheets along with other pertinent information related to the mapping project.

(6)   Map manuscript. All drafting shall be of professional quality on dimensionally stable polyester base with emulsion on back and matte finish. The title block shall contain a graphic scale, date, type of map, name of municipality, north point, the source and date of floodplain and shoreland information represented on the map sheets, and the following statement: "This map was paid for, in part, with a Floodplain and Shoreland Mapping Grant from the State of Wisconsin Department of Natural Resources." The manuscript shall be prepared in such a manner that future modification to floodplain or shoreland limits can easily be made.

History: Cr. Register, May, 1980, No. 293 , eff. 6-1-80; renum. from NR 129.14 and am. (1), (3), (4) and (6), cr. (5) (c) 4., Register, April, 1983, No. 328 , eff. 5-1-83.

Note

Within the 7 southeastern Wisconsin counties of Kenosha, Milwaukee, Ozaukee, Racine, Walworth, Washington and Waukesha, the department encourages applicants to conduct mapping projects in accordance with specifications for large scale mapping which have been prepared by the Southeastern Wisconsin Regional Planning Commission (SEWRPC). These specifications may be obtained by writing to the: Microsoft Windows NT 6.1.7601 Service Pack 1   Southeastern Wisconsin Regional Planning Commission
  916 N. East Avenue
  P.O. Box 769
  Waukesha, WI 53187 - 1607 Microsoft Windows NT 6.1.7601 Service Pack 1 These publications may be obtained from either the: Microsoft Windows NT 6.1.7601 Service Pack 1   National Geodetic Information Center (single copies)
  C185, NOS
  Rockville, MD 20852

    or the:

  U.S. Department of Commerce (multiple copies)
  National Technical Information Service
  Springville, VA 22161 Microsoft Windows NT 6.1.7601 Service Pack 1 Both publications are available for inspection at the offices of the department, the secretary of the state, and the legislative reference bureau. Microsoft Windows NT 6.1.7601 Service Pack 1