Why are my custom map overlays misaligned?

Overlay alignment issues typically stem from:
• Different datums between map layers (WGS84 vs. local)
• Projection mismatches
• Incorrect coordinate transformations
• Source data inaccuracies
• Scaling errors during import
• Software rendering limitations
• Metadata errors in source files
Check the coordinate system settings for both your base map and overlays. Try reprojecting your custom data to match the base map datum and projection.