PLATS OF SURVEYEDLANDSThe official plat of a township or othersubdivision is the drawing on which is shown thedirection and length of each line surveyed,established, retraced, or resurveyed; the relationshipto adjoining official surveys; the boundaries,designation, and area of each parcel of land; and,insofar as practical, a delineation of the topography ofthe area and a representation of the culture and worksof man within the survey limits. A subdivision of thepublic lands is not deemed to have been surveyed oridentified until the notes of the field survey have beenapproved, a plat prepared, the survey accepted by theDirector of the Bureau of Land Management asevidenced by a certification to that effect on the plat,and the plat has been filed in the district land office.Figure 10-35 shows a typical township plat. Theoriginal drawing shows both a graphical scale and arepresentative fraction for both the township as awhole and for the enlarged diagram. Because the plathas been photographically reduced, the representativefraction and scale are no longer true. Plats are drawnon sheets of uniform size, 19 inches by 24 inches intrimmed dimensions, for convenience in filing. Theusual scale is 1 inch = 40 chains, equivalent to arepresentative fraction of 1:31,680. Where detaildrawings of a portion of the survey area are required,scales of 1 inch = 20 chains or 1 inch = 10 chains maybe used. A detail of a small area may be shown(fig. 10-34) as an inset on the main plat. Larger detailsare drawn on separate sheets. When the drawing issimple, with few topographic or hydrographicFigure 10-35.—Typical township plat.10-35
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