I have line feature class with different lines. When I am performing Dissolve operation, the generated output feature class (Same geodatabase & same coordinate system) showing a minute spatial difference from the input features. But I want to get the output without changing the location. I'm here with attaching the input and out put screen sots for your review. Please help me to solve this issue.
I thought that Web Merc was a mteres based system, not feet.
But either way, that shift is very tiny, about 0.05mm.
You are probably hitting the limits of numeric resolution there.
Just zoom out a bit and ignore it.
I agree with Neil Ayres in that the shift is not of any major consequence and is likely at the limits of the software to resolve.
Note that if you are looking at the linework at a scale of less than 1:1 in ArcMap that what is seen is often a visual artifact. ESRI Tech support has confirmed that below 1:1 there can be visual results shown that are not representative of the data.
One way to check if the depicted shift is of any consequence is to evaluate it against the XY Tolerance setting for the data. If the shift is below the tolerance, then the feature are considered coincident even though they seem to be off by a small amount.
ArcGIS Help (10.2, 10.2.1, and 10.2.2) (scroll down to Tolerance section)
Tolerance\resolution concept, (GeoNet discussion on XY Tolerance and Resolution)
Chris Donohue, GISP