How can I adjust the online basemap imagery file to our existing ArcMap data. Below are steps I perform to add the basemap data.
- I Added basemap from "Add Data From GIS Online" in the file menu and then selected Imagery and added to the Desktop.
I already have some layer files in our current project in arcmap the details of our
Qatar GCS (Datum) :
Qatar Projection: Transverse_Mercator False_Easting: 200000.000000 False_Northing: 300000.000000 Central_Meridian: 51.216667 Scale_Factor: 0.999990 Latitude_Of_Origin: 24.450000 Linear Unit: Meter GCS_International_1967 Datum: D_International_1967
and the imagery from online data GCS(Datum) :
WGS_1984_Web_Mercator_Auxiliary_Sphere Projection: Mercator_Auxiliary_Sphere False_Easting: 0.000000 False_Northing: 0.000000 Central_Meridian: 0.000000 Standard_Parallel_1: 0.000000 Auxiliary_Sphere_Type: 0.000000 Linear Unit: Meter GCS_WGS_1984 Datum: D_WGS_1984
Now the problem is the added imagery data is looks like it's shifted around 100m difference with our arcmap hole data.
then I tried transformations to adjust with our arcmap data by selecting the same as our Datum: D_International_1967 in the dataframe properties but not changed anymore. and then i tried different transformations named as Qatar but same result not aligned the data.
am I trying to do the transformations at the right place.?? and any thing i missed here.???
- **Right click in the arcmap\Datafareme properties\Coordinate system tab\Layers\selecting the desired layer to transform\transormations\convert from (selecting existing GCS)\into (Selecting desired GSC)
- hit Ok.**