How to get the accurate measurement result?

[weiliang]

Hi,

I am working on the measurement widget, and it seems that the out of box 'esri/dijit/Measurement' widget is always based on Web-Mercator projection. This makes the measurement result not as accurate as local projection if I understand correctly. Is there a way to use local projection to do the measurement by using this widget? Or I must build a fresh new widget from scratch by myself if I want to get accurate measurement result?

Thanks,

Wei

[JeffPace]

Sorry, but are you actually saying that the measure widget is inaccurate for all other projections? I hope not as this is now in my production system and being used daily. All my mapping is in BNG 27700

Any time you do a conversion errors are introduced. 

If you have verified your measurements to make sure that you are working in and reporting measurements of the correct projection, then the measurement widget produces results as accurate was a web system can.