AERIAL SURVEYS 
DETERMINE THE BEST HIGHWAY LOCATION 
FOUR PROGRESSIVE 
PHOTOGRAPHY id AREA 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
SURVEY STAGES ARE EMPLOYED 
FIRST STAGE 
  
  
  
  
  
  
  
  
  
  
  
FOR RECONNAISSANCE OF AREA 
  
  
  
  
RECONNAISSANCE SURVEY OF THE ENTIRE AREA 
BETWEEN TERMINAL POINTS: 
1. STEREOSCOPIC EXAMINATION OF SMALL SCALE AERIAL PHOTOGRAPHS 
OF THE AREA, SUPPLEMENTED BY AVAILABLE MAPS 
2. DETERMINATION OF CONTROLS OF TOPOGRAPHY AND LAND USE 
3. LOCATION OF FEASIBLE ROUTES ON THE PHOTOGRAPHS AND MAPS 
  
  
  
  
FEASIBLE ROUTES PHOTOGRAPHED 
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FOR RECONNAISSANCE OF ALTERNATE ROUTES 
SECOND STAGE 
  
  
  
RECONNAISSANCE SURVEY OF FEASIBLE ROUTES: 
1. STEREOSCOPIC EXAMINATION OF LARGE SCALE AERIAL PHOTOGRAPHS 
OF EACH ROUTE 
2. DETERMINATION OF THE DETAILED CONTROLS OF TOPOGRAPHY 
AND LAND USE 
3. PREPARATION OF ROUTE MAPS BY PHOTOGRAMMETRIC METHODS 
WHEN NECESSARY 
4. LOCATION AND COMPARISON OF FEASIBLE ROUTES ON 
PHOTOGRAPHS AND MAPS 
5. SELECTION OF THE BEST ROUTE 
  
  
  
  
  
  
BEST ROUTE MAPPE 
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PRELIMINARY SURVEY 
THIRD STAGE 
  
   
  
  
PRELIMINARY SURVEY OF THE BEST ROUTE: 
1. PREPARATION OF LARGE SCALE TOPOGRAPHIC MAPS USING ROUTE 
PHOTOGRAPHS AND PHOTOGRAMMETRIC METHODS, OR 
PREPARATION OF LARGE SCALE TOPOGRAPHIC MAPS BY GROUND 
SURVEYS, GUIDED BY BEST ROUTE LOCATION MADE ON PHOTOGRAPHS 
IN SECOND STAGE 
2. DESIGN OF THE PRELIMINARY LOCATION: 
a-USING TOPOGRAPHICAL DIMENSIONS OF THE LARGE SCALE MAP, 
b-WHILE STEREOSCOPICALLY EXAMINING THE ROUTE PHOTOGRAPHS 
3. PREPARATION OF HIGHWAY CONSTRUCTION PLANS 
  
  
  
  
FOURTH STAGE 
  
  
LOCATION SURVEY STAKING OF THE RIGHT-OF-WAY AND 
OF THE HIGHWAY AND STRUCTURES FOR CONSTRUCTION