Remarks

If the associated Raster is continuous and single-band, this method will use bilinear interpolation, otherwise nearest-neighbor lookup. There is another variant of this method that lets you choose explicitly between nearest-neighbor lookup and bilinear and bicubic interpolation. Undefined values in the raster are handled correctly during interpolation. If all cells surrounding position are undefined, the undefined value will be returned. If only some of the cells are undefined, the return value will be interpolated from the remaining values.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, using nearest-neighbor lookup.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.

Remarks

Regardless of whether the associated Raster is tagged as continuous, this variant of the method will use either nearest-neighbor lookup or bilinear or bicubic interpolation, depending on the given rasterFilter. Note, though, that if the raster really is not continuous, for example if the raster values represent discrete terrain types, then only nearest-neighbor lookup makes sense.

Undefined values in the raster are handled correctly during interpolation. The interpolated value will be a weighted sum of the values for the 4 or 16 cell centers nearest the position. Bilinear interpolation uses 4 cells and bicubic uses 16. The sum of the weights for all 4 or 16 cells is 1.0, but cells that are undefined or outside the raster bounds will be ignored, so the sum of the used weights can be less than 1.0. To get a result from bilinear interpolation, it is enough if the sum of the used weights is positive (meaning at least one of the 4 cells is defined); if it is zero, the undefined value will be returned. To get a result from bicubic interpolation, the sum of the used weights must be at least 0.25.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, but note that only nearest-neighbor lookup is supported – an attempt to use bicubic or bilinear interpolation on RGB or RGBA values will throw an exception.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.

Remarks

If the associated raster is continuous and single-band, this method will use bilinear interpolation, otherwise nearest-neighbor lookup. There is another variant of this method that lets you choose explicitly between nearest-neighbor lookup and bilinear and bicubic interpolation. Undefined values in the raster are handled correctly during interpolation. If all cells surrounding position are undefined, the undefined value will be returned. If only some of the cells are undefined, the return value will be interpolated from the remaining values.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, using nearest-neighbor lookup.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.

Remarks

Regardless of whether the associated raster is tagged as continuous, this variant of the method will use either nearest-neighbor lookup or bilinear or bicubic interpolation, depending on the given rasterFilter. Note, though, that if the raster really is not continuous, for example if the raster values represent discrete terrain types, then only nearest-neighbor lookup makes sense.

Undefined values in the raster are handled correctly during interpolation. The interpolated value will be a weighted sum of the values for the 4 or 16 cell centers nearest the position. Bilinear interpolation uses 4 cells and bicubic uses 16. The sum of the weights for all 4 or 16 cells is 1.0, but cells that are undefined or outside the raster bounds will be ignored, so the sum of the used weights can be less than 1.0. To get a result from bilinear interpolation, it is enough if the sum of the used weights is positive (meaning at least one of the 4 cells is defined); if it is zero, the undefined value will be returned. To get a result from bicubic interpolation, the sum of the used weights must be at least 0.25.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, but note that only nearest-neighbor lookup is supported – an attempt to use bicubic or bilinear interpolation on RGB or RGBA values will throw an exception.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.

Remarks

If the associated raster is continuous and single-band, this method will use bilinear interpolation, otherwise nearest-neighbor lookup. There is another variant of this method that lets you choose explicitly between nearest-neighbor lookup and bilinear and bicubic interpolation. Undefined values in the raster are handled correctly during interpolation. If all cells surrounding position are undefined, the undefined value will be returned. If only some of the cells are undefined, the return value will be interpolated from the remaining values.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, using nearest-neighbor lookup.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.

Remarks

Regardless of whether the associated raster is tagged as continuous, this variant of the method will use either nearest-neighbor lookup or bilinear or bicubic interpolation, depending on the given rasterFilter. Note, though, that if the raster really is not continuous, for example if the raster values represent discrete terrain types, then only nearest-neighbor lookup makes sense.

Undefined values in the raster are handled correctly during interpolation. The interpolated value will be a weighted sum of the values for the 4 or 16 cell centers nearest the position. Bilinear interpolation uses 4 cells and bicubic uses 16. The sum of the weights for all 4 or 16 cells is 1.0, but cells that are undefined or outside the raster bounds will be ignored, so the sum of the used weights can be less than 1.0. To get a result from bilinear interpolation, it is enough if the sum of the used weights is positive (meaning at least one of the 4 cells is defined); if it is zero, the undefined value will be returned. To get a result from bicubic interpolation, the sum of the used weights must be at least 0.25.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, but note that only nearest-neighbor lookup is supported – an attempt to use bicubic or bilinear interpolation on RGB or RGBA values will throw an exception.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.

Remarks

If the associated raster is continuous and single-band, this method will use bilinear interpolation, otherwise nearest-neighbor lookup. There is another variant of this method that lets you choose explicitly between nearest-neighbor lookup and bilinear and bicubic interpolation. Undefined values in the raster are handled correctly during interpolation. If all cells surrounding position are undefined, the undefined value will be returned. If only some of the cells are undefined, the return value will be interpolated from the remaining values.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, using nearest-neighbor lookup.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.

Remarks

Regardless of whether the associated raster is tagged as continuous, this variant of the method will use either nearest-neighbor lookup or bilinear or bicubic interpolation, depending on the given rasterFilter. Note, though, that if the raster really is not continuous, for example if the raster values represent discrete terrain types, then only nearest-neighbor lookup makes sense.

Undefined values in the raster are handled correctly during interpolation. The interpolated value will be a weighted sum of the values for the 4 or 16 cell centers nearest the position. Bilinear interpolation uses 4 cells and bicubic uses 16. The sum of the weights for all 4 or 16 cells is 1.0, but cells that are undefined or outside the raster bounds will be ignored, so the sum of the used weights can be less than 1.0. To get a result from bilinear interpolation, it is enough if the sum of the used weights is positive (meaning at least one of the 4 cells is defined); if it is zero, the undefined value will be returned. To get a result from bicubic interpolation, the sum of the used weights must be at least 0.25.

If the raster contains float or integer values, the value at the specified coordinate will be returned as a float. If the raster contains RGB or RGBA values, the returned value will be the average of the three color channels, i.e. the intensity of the color, but note that only nearest-neighbor lookup is supported – an attempt to use bicubic or bilinear interpolation on RGB or RGBA values will throw an exception.

If position is outside the bounds of the raster, the undefined value of the raster will be returned, or, if the raster doesn't have one, a value less than −1.0e38.