detect road centerline

Hi, I am a professional civil engineer. I can do this via GIS applications. The line will have real feature and it will have coordinates as required by you. If you are interested, kindly contact me for details. Thank you.

I am civil engineer having more than 4 years of experience in mega projects including tunnels mega structures, water structures buildings and roads etc

Hi! My name is Alpar. I used to work as a road & bridge designer... First of all you need a reference coordinate (a point on the photo with known X,Y coordinates), then you need a scale reference (a line with a known dimension). You can grab for example a Google Maps photo to overlay with this and scale this image to match the dimensions, and then you can extract a reference line with the ruler of the Google Maps. I don't think you can achieve better precision than 1m. Then you draw two lines at the right and the left margin of the road, and then you make offsets inside. Until you guess the precise road width. So if you have the ax, you need to use the measure command in AutoCAD, then extract the point coordinates. As I said... I don't think you can achieve better precision than 1m, and even that is quite hard, and impossible to verify on just an image. The ax curve is composed by transitional curves like clothoides... You cannot guess where is the exact beginning and where is the ending of one curve. If you have questions I'm happy to help you.

I am a senior highway design engineer. I have worked on various national highway government projects which includes grade separator, ROB and RUB. I have designed all my centerlines in MX roads software

Wil the image be available on google earth to get the correct coordinate system if so will be able to create alignment and extract coordinates from it. How do you want the information? Table or profile or on cad? All depends on information received

Hi, I am a road engineer, I can design a smooth centerline or alignment for the ramp. I need only the aerial image georeferenced. I would generate the coordinate report each 5m and centerline report.