The department came to the conclusion after conducting a 24-hour Global Positioning System (GPS) survey four days after the 7.9-magnitude earthquake struck the country on April 25, Director of the Survey Department Madhu Sudhan Adhikari told reporters here.
The Kathmandu valley was at 1,338 meters from the sea level before the earthquake. Now the altitude of the valley is 1338.80 metres.
However, the department did not say whether the altitude of the world's highest peak, Mount Everest at 8,848 metres has changed.