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Accurate measurements with AGOL basemaps

Question asked by adaminglis on Aug 21, 2014
Latest reply on Aug 21, 2014 by bruce.simonson

I am looking for a way to get accurate measurements on webmap hosted on AGOL using AGOL basemap (Web Mercator).   Is there a way to set the projection of the webmap to UTM without using a custom basemap?  Or is there a way to modify the existing measurement and draw widgets to measure in a custom projection (i.e. measure in UTM10 off a webmap in Web Mercator)?


ESRI Canada did direct me to JS samples:
Measurement with projected map | ArcGIS API for JavaScript

Measurement | ArcGIS API for JavaScript


I have no JS dev experience, so before I dive head first into this I'd like to see what other people are doing.  Surely I can't be the only on in this boat, Web Mercator seems utterly pointless for measuring when the discrepancies are so high, as illustrated in the sample page below:

Area and Distance Measurements


Measuring distances and areas when your map uses the Mercator projection | ArcGIS Blog