Measure tools is not right

Mar 31, 2011 at 6:19 PM

Hi,

I've tried the measure (distance and area) tool of Dotspatial DemoMap as well as the measure tool in MapWindow 6 ans Hydro Desktop and the result are wrong. Here is what I did for testing and validating:

- Mesuring my street with DemoMap, MapWindow 6 and HydroDesktop give all the same result: 1081 meters (HydroDesktop has Bings base map)

- Mesuring my street with MapPoint 2010 and Google Earth gives me the real result: 740 meters

Area measurement are wrong too as a small polygon over a zone I know give hundreds of km2 but its not more than 2-3 km2 in reality.

Does anybody have noticed this ??

Thanks.

Jean

Coordinator
Mar 31, 2011 at 7:06 PM

This could be a projection issue. What data are you using to measure? Do you have a shapefile or image? What projection is it in? - Dan

Apr 1, 2011 at 12:47 PM

I was using a Shape I built using Google Earth base map as reference so I guess projection is Plate Carrée.