A floodplain map has three key components: base map imagery and/or cartographic line work, an elevation model representing the earth’s surface or “terrain,” and flood study results generated from ...

When National Geospatial-Intelligence Agency partners plan operations, the agency provides them with products that identify the latitude and longitude of various locations, so that they can pinpoint ...

Google has quietly added elevation data to bike routes in its Maps service, providing better intel for intrepid cyclists. The feature, which launched Friday, seems to work for much of the U.S. and ...

You can find your elevation on Google Maps by turning on the "Terrain" function. By default, Google Maps only shows elevation in mountainous areas — it doesn't report elevation everywhere. For more ...

Your phone’s GPS chip works without an internet connection, but most navigation apps need data to load map tiles, calculate routes, and display points of interest. That means losing signal on a ...

Floodplain mapping involves determining amount of flooding (hydrology), the height of flooding (hydraulics), and the land areas impacted by flooding. A floodplain or flood hazard map has two key ...