5.10　Route Optimization with Three-dimensional Digital Model

5.10.1　The route map of orthophoto images shall include orthophoto images，contour，villages，annotation information，route during the preliminary design，GPS control points，and grids in km.

5.10.2　Survey personnel shall cooperate with the design personnel to accurately adjust the route，and take advantage of the orthophoto image maps and digital ground elevation model in a visualized threedimensional environment to optimize the route scheme.

5.10.3　Skeletonized plan and section shall be produced based on the DEM.

5.10.4　During the optimization of route scheme，the terrain of tower locations shall be checked one by one and the slope of tower foundation shall be measured.

5.10.5　During the optimization of route scheme，the offset and area of houses on both sides of the line shall be measured.

5.10.6　The following data shall be submitted after route optimization:

1　Turning angle coordinates；

2　Diagram of house area obtained through aerial photographing；

3　Sketches of plan and section；

4　Diagram of images of route；

5　Route optimization report.