How Features are Marked

Curbs and curblines

Curbs are captured with 2 lines in 3D, the Edge of Pavement and the Back of Curb. See below. It is advised to offset from those two lines to get the rest of the curb geometry. When Edge of pavement is not present, the drafter may use a Toe breakline to represent the curb geometry. All curbs will have 2 lines that represent its geometry.

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walls and fences

Brick walls, concrete walls and fences are captured in 2D with one line down the center. Any elevation change, such as with a retaining wall, are captured in 3D with breaklines.

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shear faces and walls

Shear faces and walls are captured in 3D with a top and too breakline. Please note that data at the bottom of a shear wall or face can be unreliable due to the limitations of photogrammetry and may not be captured if the drafter determines that it is unreliable data.

trees

Vegetated areas are marked to the best ability possible with the given data. Please note that data under tree canopies can be unreliable due to the limitations of photogrammetry and may not be captured if the drafter determines that it is unreliable data.