GIVEN:

Read Section $11-20$ to $11-23$ in your book. The following table represents field data with elevations for a $500$ foot by $300$ foot parcel where the elevations were obtained using a $100-$foot square checkerboard pattern. Point A$-1$ is at the northwest corner and point F$4$ is as the southeast corner. Elevations are in feet.

$\backslash$table$[[$Point$,$A$,$B$,$C$,$D$,$E$,$F$],[1,622\mathrm{.}9,626\mathrm{.}6,627\mathrm{.}4,626\mathrm{.}6,627\mathrm{.}5,628\mathrm{.}2],[2,627\mathrm{.}0,631\mathrm{.}0,633\mathrm{.}3,634\mathrm{.}6,633\mathrm{.}0,633\mathrm{.}6],[3,627\mathrm{.}5,633\mathrm{.}3,635\mathrm{.}7,637\mathrm{.}0,634\mathrm{.}2,638\mathrm{.}3],[4,628\mathrm{.}4,632\mathrm{.}2,633\mathrm{.}5,634\mathrm{.}2,637\mathrm{.}7,641\mathrm{.}2]]$

PROCEDURE

$1.)$ Using green computational or conventional grid paper, plot out the $500$ foot $x300$ foot grid of data shots on the sheet turned Landscape using $1$ square $=10$ feet.

$2.)$ Start in the upper left hand corner with the $623$ contour elevation and use the interpolation method to place a series of dots throughout the grid until the contour leaves the grid.

$3.)$ Draw a smooth line though the dots and the resulting line is the $623$ contour.

$4.)$ Continue on with each elevation that can be interpolated to the nearest foot.

$5.)$ Label contours to the nearest foot when complete.