DataSet.TryGetNormalizedFloatValueAt Methods
Gets the float value from a raster cell at the specified position, normalized by Scale and Offset.
Thread safety: This method is thread-safe.
Overload List
| Name | Description | |
|---|---|---|
 Public method | TryGetNormalizedFloatValueAt(Point point, out System.Single value) | Gets the float value from a raster cell at the specified position, normalized by Scale and Offset, using bilinear interpolation if the dataset is continuous. |
| Public method | TryGetNormalizedFloatValueAt(Point point, RasterFilter rasterFilter, out System.Single value) | Gets the float value from a raster cell at the specified position, normalized by Scale and Offset, using a given interpolation method. |
TryGetNormalizedFloatValueAt(Point point, out System.Single value)
Gets the float value from a raster cell at the specified position, normalized by Scale and Offset, using bilinear interpolation if the dataset is continuous.Syntax
public System.Boolean TryGetNormalizedFloatValueAt (
Point point,
out System.Single value
)Parameters
point
Type: Point
The position, expressed in the coordinate reference system of the dataset, to get a value at.
The position, expressed in the coordinate reference system of the dataset, to get a value at.
value
Type: System.Single
Output parameter to return the raster value. If the method returns False, the value is undefined.
Output parameter to return the raster value. If the method returns False, the value is undefined.
Return Value
Type: System.Boolean
In C# and C++ this method returns True if a raster value is found and False otherwise. In Java and Python, the actual value is returned, or null (Java) or None (Python) if no raster value is found.
In C# and C++ this method returns True if a raster value is found and False otherwise. In Java and Python, the actual value is returned, or null (Java) or None (Python) if no raster value is found.
Remarks
This method is similar to GetNormalizedFloatValueAt, except that it will return False, null (Java) or None (Python) on failure instead of throwing an exception.
Example
// Try to get the normalized float value at Gothenburg
public static bool TryGetNormalizedFloatValueAtGothenburg(DataSet dataSet, out float value)
{
// The center coordinates of Gothenburg in Wgs8LongLat
Point gothenburgCenter = new Point(11.974560, 57.708870);
// Project the center coordinates of Gothenburg to the Crs of the DataSet
gothenburgCenter = dataSet.Crs.ProjectFromLongLat(gothenburgCenter);
// Try to get the normalized float value at Gothenburg center and return it.
// This method is similar to GetNormalizedFloatValueAt, except that it will
// return false on failure instead of throwing an exception.
return dataSet.TryGetNormalizedFloatValueAt(gothenburgCenter, out value);
}
TryGetNormalizedFloatValueAt(Point point, RasterFilter rasterFilter, out System.Single value)
Gets the float value from a raster cell at the specified position, normalized by Scale and Offset, using a given interpolation method.Syntax
public System.Boolean TryGetNormalizedFloatValueAt (
Point point,
RasterFilter rasterFilter,
out System.Single value
)Parameters
point
Type: Point
The position, expressed in the coordinate reference system of the dataset, to get a value at.
The position, expressed in the coordinate reference system of the dataset, to get a value at.
rasterFilter
Type: RasterFilter
The interpolation method: either nearest-neighbor, bilinear or bicubic.
The interpolation method: either nearest-neighbor, bilinear or bicubic.
value
Type: System.Single
Output parameter to return the raster value. If the method returns False, the value is undefined.
Output parameter to return the raster value. If the method returns False, the value is undefined.
Return Value
Type: System.Boolean
In C# and C++ this method returns True if a raster value is found and False otherwise. In Java and Python, the actual value is returned, or null (Java) or None (Python) if no raster value is found.
In C# and C++ this method returns True if a raster value is found and False otherwise. In Java and Python, the actual value is returned, or null (Java) or None (Python) if no raster value is found.
Remarks
This method is similar to GetNormalizedFloatValueAt, except that it will return False, null (Java) or None (Python) on failure instead of throwing an exception.
Example
// Try to get the normalized float value at Gothenburg, using bicubic interpolation.
public static bool TryGetNormalizedFloatValueAtGothenburgBicubic(DataSet dataSet, out float value)
{
// The center coordinates of Gothenburg in Wgs8LongLat
Point gothenburgCenter = new Point(11.974560, 57.708870);
// Project the center coordinates of Gothenburg to the Crs of the DataSet
gothenburgCenter = dataSet.Crs.ProjectFromLongLat(gothenburgCenter);
// Try to get the normalized float value at Gothenburg center and return it.
// This method is similar to GetNormalizedFloatValueAt, except that it will
// return false on failure instead of throwing an exception.
return dataSet.TryGetNormalizedFloatValueAt(gothenburgCenter, RasterFilter.Bicubic, out value);
}
Platforms
Windows, Linux, Android