Geophysical investigation through vertical magnetic gradient for highlighting and positioning burried metal objects. Since the land presented many anomalies we used electromagnetic locator with passive and active signal. In these condition has been identified electrical line that crossed the perimeter and buried concret blocks. For land with high electromagnetic noise, the results of many buried metal objects, we rezommend several complementary geophysical methods to disseminate geophysical signal. Profile positioning was performed with high precision RTK GPS.