Measure Action Does Not Always Give Correct Area

[RyanCoodey]

The best way to describe this is by looking at the attached two screen shots... The one that is a square has the correct area, but the one that obviously should be larger, is actually smaller...  The line distances seem just fine, but the area is not correct... seems to be when the polygon is more convex.  Is this a bug?

Thanks!

[AliMirzabeigi]

Ryan,

Thank you so much for your report. We are currently looking into this problem.

[Anonymous User]

Original User: rcoodey

Thanks Ali,

Another issue I found with the measure tool and it seems only when:
MeasureAction.MeasureMode = ESRI.ArcGIS.Client.Actions.MeasureAction.Mode.Polygon;
If you double click right away (i.e. the length is 0 and the area is 0) it crashes with "Object reference not set to an instance of an object"

A few other requests I have for the Measure Action in the future too
1) The distance unit is labeled for the totals (ie. feet, miles, etc) but not for the individual lines.
     - For example, I am in polygon mode, and the area is labeled as Acres, which is great, but I don't have a label letting me know the lines are Feet.
2) The ability to programmatically cancel/quit a measure action.  This has been asked by me and several others in other posts as well.

Thanks a lot for the help!!!

[ChristineZeller]

Ryan,

It sounds like you have got the measure area tool down.  Sorry to cross my post with yours but I was wondering if you had time to quickly help me with my problem.  I just can't seem to get it.

http://forums.arcgis.com/threads/14730-Area-And-Perimeter

Thanks and Sorry.

[Anonymous User]

Original User: rcoodey

I looked through your issue... I'm not using a Geometry Service but using a MeasureAction... this action takes care of the conversion for me, I just have to specify a few properties:

MeasureAction.AreaUnit = ESRI.ArcGIS.Client.Actions.AreaUnit.Acres;
MeasureAction.DistanceUnit = ESRI.ArcGIS.Client.Actions.DistanceUnit.Feet;
MeasureAction.MapUnits = DistanceUnit.DecimalDegrees;

MesureAction is not in the toolkit though or I would say go and look at the source for it and see what it is doing for conversions... As far as I know, the source for the API is not available though :(.

I have never used the AreasAndLengths Geometry Service, but I wonder if the Area calculation issue is similar/related to my above issue...

Sorry for not helping much 😞

[DeryckMills]

Ryan,

Thank you so much for your report. We are currently looking into this problem.

Any luck with a fix for this problem.  Am also having the same issue.

Thanks