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My second question is why the arcmap dont give me on screen error before I started to editing for different coordinate system.
After all when I am change Coordinate system in ArcCatalog and open my vector data in ArcMap some of data going to left side and some of data go to right side.
How did you change the coordinate system in ArcCatalog? Did you open the datasets' property page, and change it in the "Coordinate System" tab? That only changes the declared coordinate system; it doesn't change the actual x,y values in the dataset. If your datasets are actually in zone 9, they need to be reprojected (using the Project geoprocessing tool) to zone 8. Have you tried this?
You can change the projection of the datasets using the " Define Projections " tool.
Irregularities may occur, as you were using a different projection system while editing the features earlier.
Thank you for help.
I am trying some ways to re-project data and use them in same coordinate system.
After all in first I set the coordinate system to the GCS-WGS-84.
Than in second set projected coordinate system again but using
**ArcToolbox-Data Management Tool-Projection-Feature projection.
I don't know any idea about this way re-project. Is it done?
But now everything is ok.
Have a nice day.