WMS:Interpolation of DEMs elevations to TINs and 2D Grids: Difference between revisions
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==Interpolation to TIN Elevations== | ==Interpolation to TIN Elevations== | ||
The Interpolate to TIN command of the DEM menu is used to interpolate the elevations of the DEM to an existing TIN. If TIN vertices lie outside the bounds of the active region of the DEM, no interpolation is performed. This interpolation is done automatically when creating a TIN from feature objects and a DEM is used for a background elevation map. If you are trying to create a TIN from a very large DEM (large number of DEM points) it may be advantageous to create the TIN first and then interpolate elevations from the DEM in a piece-wise fashion by dividing the DEM into several smaller regions and interpolating to the TIN one at a time. | The '''Interpolate to TIN''' command of the ''DEM'' menu is used to interpolate the elevations of the DEM to an existing TIN. If TIN vertices lie outside the bounds of the active region of the DEM, no interpolation is performed. This interpolation is done automatically when creating a TIN from feature objects and a DEM is used for a background elevation map. If you are trying to create a TIN from a very large DEM (large number of DEM points) it may be advantageous to create the TIN first and then interpolate elevations from the DEM in a piece-wise fashion by dividing the DEM into several smaller regions and interpolating to the TIN one at a time. | ||
==Interpolation to 2D Grids== | ==Interpolation to 2D Grids== | ||
Elevations from the DEM can be interpolated to a 2D finite difference grid used for GSSHA models. This is accomplished using the Interpolate to 2D Grid command of the DEM menu. | Elevations from the DEM can be interpolated to a 2D finite difference grid used for GSSHA models. This is accomplished using the '''Interpolate to 2D Grid''' command of the ''DEM'' menu. | ||
Revision as of 21:21, 17 January 2013
Interpolation to TIN Elevations
The Interpolate to TIN command of the DEM menu is used to interpolate the elevations of the DEM to an existing TIN. If TIN vertices lie outside the bounds of the active region of the DEM, no interpolation is performed. This interpolation is done automatically when creating a TIN from feature objects and a DEM is used for a background elevation map. If you are trying to create a TIN from a very large DEM (large number of DEM points) it may be advantageous to create the TIN first and then interpolate elevations from the DEM in a piece-wise fashion by dividing the DEM into several smaller regions and interpolating to the TIN one at a time.
Interpolation to 2D Grids
Elevations from the DEM can be interpolated to a 2D finite difference grid used for GSSHA models. This is accomplished using the Interpolate to 2D Grid command of the DEM menu.
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