topic River Mileage Help in Water Resources Questions https://community.esri.com/t5/water-resources-questions/river-mileage-help/m-p/354476#M1762 <HTML><HEAD></HEAD><BODY><SPAN>I am making a water trail map for a park and I have traced the river using the measurement tools in mileage. When I handed in a rough copy of the map someone from the office insisted it was incorrect because they drove close by the river and their odometer said it was closer to 5 miles and I have 3.9. I guess my silly question is how accurate are the measurement tools and how accurate is measuring the river by road? If someone could please answer it would be greatly appreciated. Thank you in advance.</SPAN></BODY></HTML> Mon, 16 Dec 2013 13:05:47 GMT JB 2013-12-16T13:05:47Z River Mileage Help https://community.esri.com/t5/water-resources-questions/river-mileage-help/m-p/354476#M1762 <HTML><HEAD></HEAD><BODY><SPAN>I am making a water trail map for a park and I have traced the river using the measurement tools in mileage. When I handed in a rough copy of the map someone from the office insisted it was incorrect because they drove close by the river and their odometer said it was closer to 5 miles and I have 3.9. I guess my silly question is how accurate are the measurement tools and how accurate is measuring the river by road? If someone could please answer it would be greatly appreciated. Thank you in advance.</SPAN></BODY></HTML> Mon, 16 Dec 2013 13:05:47 GMT https://community.esri.com/t5/water-resources-questions/river-mileage-help/m-p/354476#M1762 JB 2013-12-16T13:05:47Z Re: River Mileage Help https://community.esri.com/t5/water-resources-questions/river-mileage-help/m-p/354477#M1763 <HTML><HEAD></HEAD><BODY><SPAN>It depends on the shape of the river versus the road, but still 1 mile is still quite large even in this case. I would double-check the projection and make sure you are using a projection that provides a good representation of the true length.</SPAN><BR /><BR /><SPAN>Christine Dartiguenave</SPAN><BR /><SPAN>Esri Water Resources Team</SPAN></BODY></HTML> Mon, 16 Dec 2013 21:53:28 GMT https://community.esri.com/t5/water-resources-questions/river-mileage-help/m-p/354477#M1763 ChristineDartiguenave 2013-12-16T21:53:28Z