Several websites, including DaftLogic.com, provide elevation results for address queries. The search functions provides elevation results in both feet and meters. Most sites also offer interactive maps for determining elevations at point where a physical address is unknown.
Other sites that offer elevation information for specific addresses include FreeMapTools.com and MapDevelopers.com. The latter also provides elevation changes for a path, which is created by entering specific addresses or by clicking points on the map. These websites also provide other geographical information, including latitude and longitude.
Topographical maps provide information about elevation changes. Google Maps is one site that offers area topography. To access area topography, after opening Google Maps, click the menu button and select Terrain. This feature overlays the existing map with topography lines and shaded contours that indicate slope. Tight topography lines indicate a steep slope, while wide gaps between topography lines indicate gentle slopes or flat lands.
Elevation information is always given relative to sea level. Many areas in the world have a negative elevation value, indicating that these areas are actually below sea level. The lowest point on Earth is the Dead Sea, which reaches 1,371 feet below sea level. The highest point on Earth is the peak of Mount Everest, which reaches 29,029 feet above sea level.