Transcription of Chapter 4 - Photogrammetry
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Survey Manual Chapter 4 Aerial Surveys Colorado Department of Transportation December 30, 2015 2 CDOT Survey Manual December 30, 2015 TABLE OF CONTENTS Chapter 4 Aerial Surveys General .. 4 Acronyms found in this Chapter .. 4 Purpose of this Chapter .. 5 Aerial Surveys .. 5 Aerial Photogrammetry .. 5 Photogrammetric Advantages / Disadvantages .. 6 Aerial LiDAR .. 6 LiDAR Advantages / Disadvantages .. 7 Pre-survey Conference Aerial Survey .. 9 Ground Control for Aerial Surveys .. 10 General .. 10 Ground Control Targeting Requirements .. 10 Photogrammetry .. 11 Aerial LiDAR .. 12 Equipment Checking and Calibration .. 12 Permission to Enter Property Form 730a .. 12 Underground Utility Locates Prior to Installing Photo Control Monumentation.
mapping that has been historically referred to as 1”=50’ scale mapping with 1’ contours. The vast majority of aerial mapping contracted by CDOT calls for mapping standards associated with this scale. Where requirements differ from this scale, the necessary equipment, ground control, flight planning and other key
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