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Use of linear referencing on a route that span over 3 different UTM zones.

Question asked by khodor.sabra on Oct 22, 2018
Latest reply on Oct 23, 2018 by tkowal

I have a long route (~2400 KM) that span 3 different UTM zones. (N - 37, 38, 39)


On this route there is a sign every 1 km-approximately (km marker), these signs help in determining the exact location of assets along the road etc…


I have the actual location of these signs as a point and it turned out that the distance between 2 markers is between 1100 m to 1200 m in general so there is an error in these markers location caused by human mistakes. So I need to create new km markers that conserve the distance between the 2 markers (1000 m) using linear referencing and event tables on my road route.


But the problem is my route passes by 3 different UTM zones and all of my data are geographic WGS84 which is in degree, therefore, I can’t create km markers using linear referencing and event table in this case for each 1 km as my m measurements if the route was WGS 84.


And I need the rout to be 1 single record along the 3 UTM zones so I can’t divide the route based on the projection boundary. Even though I tried to do this and also had an error equal to 20 m on the boundaries of the projection zone.


What should my route projection be in this case? So that the linear referencing and event tables work without any distortion.


For sure the route should be in a projected coordinate system since we're using meters (1000 m) to dived the route or you think we can use the geographic coordinate system by transforming the m value to a decimal degree.