Documentation
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Index ¶
- Constants
- func ComputeMedianCutPCT(red, green, blue RasterBand, colors int, ct ColorTable, progress ProgressFunc, ...) int
- func DitherRGB2PCT(red, green, blue, target RasterBand, ct ColorTable, progress ProgressFunc, ...) int
- func GridCreate(algorithm GridAlgorithm, options interface{}, x, y, z []float64, ...) ([]float64, error)
- type GridAlgorithm
- type GridDataMetricsOptions
- type GridInverseDistanceToAPowerNearestNeighborOptions
- type GridInverseDistanceToAPowerOptions
- type GridLinearOptions
- type GridMovingAverageOptions
- type GridNearestNeighborOptions
Constants ¶
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const ( GA_InverseDistancetoAPower = GridAlgorithm(C.GGA_InverseDistanceToAPower) GA_MovingAverage = GridAlgorithm(C.GGA_MovingAverage) GA_NearestNeighbor = GridAlgorithm(C.GGA_NearestNeighbor) GA_MetricMinimum = GridAlgorithm(C.GGA_MetricMinimum) GA_MetricMaximum = GridAlgorithm(C.GGA_MetricMaximum) GA_MetricRange = GridAlgorithm(C.GGA_MetricRange) GA_MetricCount = GridAlgorithm(C.GGA_MetricCount) GA_MetricAverageDistance = GridAlgorithm(C.GGA_MetricAverageDistance) GA_MetricAverageDistancePts = GridAlgorithm(C.GGA_MetricAverageDistancePts) GA_Linear = GridAlgorithm(C.GGA_Linear) GA_InverseDistanceToAPowerNearestNeighbor = GridAlgorithm(C.GGA_InverseDistanceToAPowerNearestNeighbor) )
Variables ¶
This section is empty.
Functions ¶
func ComputeMedianCutPCT ¶
func ComputeMedianCutPCT( red, green, blue RasterBand, colors int, ct ColorTable, progress ProgressFunc, data interface{}, ) int
Compute optimal PCT for RGB image
func DitherRGB2PCT ¶
func DitherRGB2PCT(
red, green, blue, target RasterBand,
ct ColorTable,
progress ProgressFunc,
data interface{},
) int
24bit to 8bit conversion with dithering
func GridCreate ¶
func GridCreate( algorithm GridAlgorithm, options interface{}, x, y, z []float64, xMin, xMax, yMin, yMax float64, nX, nY uint, progress ProgressFunc, data interface{}, ) ([]float64, error)
GridCreate: Create regular grid from the scattered data. This function takes the arrays of X and Y coordinates and corresponding Z values as input and computes regular grid (or call it a raster) from these scattered data. You should supply geometry and extent of the output grid.
Types ¶
type GridDataMetricsOptions ¶
type GridDataMetricsOptions struct {
// Radius1: The first radius (X axis if rotation angle is 0) of search ellipse.
Radius1 float64
// Radius2: The second radius (Y axis if rotation angle is 0) of search ellipse.
Radius2 float64
// Angle: Angle of ellipse rotation in degrees. Ellipse rotated counter clockwise.
Angle float64
// MinPoints: Minimum number of data points to use.
// If less amount of points found the grid node considered empty and will be filled with NODATA marker.
MinPoints uint32
// NoDataValue: No data marker to fill empty points.
NoDataValue float64
}
GridDataMetricsOptions: Data metrics method control options
type GridInverseDistanceToAPowerNearestNeighborOptions ¶
type GridInverseDistanceToAPowerNearestNeighborOptions struct {
// Power: Weighting power
Power float64
// Radius: The radius of search circle
Radius float64
// Smoothing: Smoothing parameter
Smoothing float64
// MaxPoints: Maximum number of data points to use.
// Do not search for more points than this number. If less amount of points found the grid node
// considered empty and will be filled with NODATA marker.
MaxPoints uint32
// MinPoints: Minimum number of data points to use.
// If less amount of points found the grid node considered empty and will be filled with NODATA marker.
MinPoints uint32
// NoDataValue: No data marker to fill empty points.
NoDataValue float64
}
GridInverseDistanceToAPowerNearestNeighborOptions: Inverse distance to a power, with nearest neighbour search, control options
type GridInverseDistanceToAPowerOptions ¶
type GridInverseDistanceToAPowerOptions struct {
// Power: Weighting power
Power float64
// Smoothing: Smoothing parameter
Smoothing float64
// AnisotropyRatio: Reserved for future use
AnisotropyRatio float64
// AnisotropyAngle: Reserved for future use
AnisotropyAngle float64
// Radius1: The first radius (X axis if rotation angle is 0) of search ellipse.
Radius1 float64
// Radius2: The second radius (Y axis if rotation angle is 0) of search ellipse.
Radius2 float64
// Angle: Angle of ellipse rotation in degrees. Ellipse rotated counter clockwise.
Angle float64
// MaxPoints: Maximum number of data points to use.
// Do not search for more points than this number. If less amount of points found the grid node
// considered empty and will be filled with NODATA marker.
MaxPoints uint32
// MinPoints: Minimum number of data points to use.
// If less amount of points found the grid node considered empty and will be filled with NODATA marker.
MinPoints uint32
// NoDataValue: No data marker to fill empty points.
NoDataValue float64
}
GridInverseDistanceToAPowerOptions: Inverse distance to a power method control options.
type GridLinearOptions ¶
type GridLinearOptions struct {
// Radius: in case the point to be interpolated does not fit into a triangle of the Delaunay triangulation,
// use that maximum distance to search a nearest neighbour, or use nodata otherwise. If set to -1, the search
// distance is infinite. If set to 0, nodata value will be always used.
Radius float64
// NoDataValue: no data marker to fill empty points.
NoDataValue float64
}
GridLinearOptions: Linear method control options.
type GridMovingAverageOptions ¶
type GridMovingAverageOptions struct {
// Radius1: The first radius (X axis if rotation angle is 0) of search ellipse.
Radius1 float64
// Radius2: The second radius (Y axis if rotation angle is 0) of search ellipse.
Radius2 float64
// Angle: Angle of ellipse rotation in degrees. Ellipse rotated counter clockwise.
Angle float64
// MinPoints: Minimum number of data points to use.
// If less amount of points found the grid node considered empty and will be filled with NODATA marker.
MinPoints uint32
// NoDataValue: No data marker to fill empty points.
NoDataValue float64
}
GridMovingAverageOptions: Moving average method control options
type GridNearestNeighborOptions ¶
type GridNearestNeighborOptions struct {
// Radius1: The first radius (X axis if rotation angle is 0) of search ellipse.
Radius1 float64
// Radius2: The second radius (Y axis if rotation angle is 0) of search ellipse.
Radius2 float64
// Angle: Angle of ellipse rotation in degrees. Ellipse rotated counter clockwise.
Angle float64
// NoDataValue: No data marker to fill empty points.
NoDataValue float64
}
GridNearestNeighborOptions: Nearest neighbor method control options.
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