|
|
| (13 intermediate revisions by 2 users not shown) |
| Line 1: |
Line 1: |
| The [[elevation model]] defines the height of the terrain on and in which the hydrology is modeled. Elevation includes the relief on the surface of dry land, but also the height of the stream beds of water bodies.
| | #REDIRECT [[Elevation model (Water Overlay)]] |
| | |
| By default the [[elevation model]] will be derived from data sources relevant to the geographical location of the project area. However, especially in water bodies the level of detail of the elevation model may be insufficient. For these situations it's possible to load in a(n additional) [[GeoTIFF]] defining elevations, load in a [[GeoJSON]] file with water depths, or [[terrain height brush|manually modify the elevation model]].
| |
| | |
| In addition to the [[elevation model]], the height of [[building]]s is also taken into account. [[Breach (Water Overlay)|Breach]]es are also embedded into the resulting [[Elevation model (Water Overlay)|Digital Surface Model]] the [[Water Module]] uses for its calculations.
| |
| | |
| During a session, a number of [[action]]s can directly affect the terrain height. [[Action]]s such as the creation of [[levee]]s, or the creation of open water, both affect the topography. Placing or removing [[building]]s also affects the terrain height, in terms of where water can flow.
| |
| | |
| {{GeoTiffSpec
| |
| |title=Terrain height
| |
| |description=The height of the terrain's surface across the project area.
| |
| |nodata=Data is unchanged from the base terrain height.
| |
| |value=Terrain height
| |
| |unit={{mdatum}}
| |
| }}
| |
| | |
| ==How to's==
| |
| * [[How to import a GeoTIFF to change the elevation model]]
| |
| * [[How to import a GeoTIFF of waterway depths]]
| |
| * [[How to import a GeoJSON to change the elevation model]]
| |
| | |
| ==See also==
| |
| * [[Levee]]
| |
| * [[Elevation model]]
| |
| * [[Breach (Water Overlay)]]
| |
| * [[Subsidence (Water Overlay)]]
| |
| * [[Surface model (Water Overlay)]]
| |
| * [[Elevation model (Water Overlay)]]
| |
| | |
| {{WaterOverlay simulation data nav}}
| |