I have been digitizing building footprints from satellite image using ArcGIS 10.1 . Field data collections is done with the use of four corner point GPS way point. Due to multipath errors, we are using satellite image to complement it for better accuracy.
I have two different satellite images which one of them is a recent one but lower resolution, while the other one is an old one with a better resolution.
I have tried to use the old one with better resolution in my heads up digitizing. It went well .
My problem is once overlayed with recent image, polygons bounce off few meters to the road.
Polygon Coordinates and Projection: Projected Coordinate System: WGS_84_UTM_zone_38N Projection: Transverse_Mercator false_easting: 500000.00000000 false_northing: 0.00000000 central_meridian: 45.00000000 scale_factor: 0.99960000 latitude_of_origin: 0.00000000 Linear Unit: Meter
Geographic Coordinate System: GCS_WGS_1984 Datum: D_WGS_1984 Prime Meridian: Greenwich Angular Unit: Degree
Old Satelite image Coordinates Spatial Reference: GCS_WGS_1984 Angular Unit: Degree (0.0174532925199433) Datum: D_WGS_1984
New Satellite image Coordinates Spatial Reference: WGS_84_UTM_zone_38N Angular Unit:Degree (0.0174532925199433) Datum: D_WGS_1984
What could be the problem and how would you go around it?