Obtains the related information about the rational polynomial coefficients (RPCs) of a raster object. If the specified raster object contains RPC information, a JSON string is returned. If the specified raster object does not contain RPC information, null is returned.
Syntax
text ST_RPCGeoreference(raster raster_obj)Parameters
| Parameter | Description |
|---|---|
| raster_obj | The raster object. |
Description
The ST_RPCGeoreference function returns a JSON string that contains RPC parameters. This string describes the reference information about the RPC space. The following table describes the supported parameters.
| Parameter | Description | Type |
|---|---|---|
| lineOff | The line offset. | float |
| sampOff | The sampling offset. | float |
| latOff | The latitude offset. | float |
| longOff | The longitude offset. | float |
| heightOff | The height offset. | float |
| lineScale | The line ratio. | float |
| sampScale | The sampling ratio. | float |
| latScale | The latitude ratio. | float |
| longScale | The longitude ratio. | float |
| heightScale | The height ratio. | float |
| lineDenCoeff | The number of coefficients for a line denominator. Valid values: 1 to 20. | float array |
| lineNumCoeff | The number of coefficients for a line numerator. Valid values: 1 to 20. | float array |
| sampNumCoeff | The number of coefficients for a sample numerator. Valid values: 1 to 20. | float array |
| sampDenCoeff | The number of coefficients for a sample denominator. Valid values: 1 to 20. | float array |
| errBias | The bias errors. The root-mean-square (RMS) bias errors in meters. These errors are
related to all points per horizontal axis in an image. Default value: -1.0.
|
float |
| errRandom | The random errors. The RMS random errors in meters. These errors are related to each
point per horizontal axis in an image. Default value: -1.0.
|
float |
Example:
SELECT ST_RPCGeoreference(raster_obj) FROM raster_table where id=1;
__________________________________
{"lineOff":12800.0,"sampOff":4008.0,"latOff":55.0203,"longOff":27.0478,"heightOff":179.0,"lineScale":12800.0,"sampScale":4008.0,"latScale":0.1238,"longScale":0.0685,"heightScale":300.0,"errBias":-1.0,"errRandom":-1.0,"lineDenCoeff":[1.0,-0.00050066513,-0.0014578309,0.0006037474.
.4,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0],"lineNumCoeff":[-0.002104832,-0.01642616,-1.027459,0.0041820025,-0.0019027952,0.000016143133,0.00047863558,-0.00021278669,0.0069588307,-0.0000022605722,-2.2259552e-7,-3.7469372e-7,0.00046486457,-1.8012888e-8,0.0.
.000051407583,0.00075661479,-5.4524409e-7,1.3940799e-7,-0.000018281596,2.4215581e-9],"sampDenCoeff":[1.0,-0.00050066513,-0.0014578309,0.00060374744,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0],"sampNumCoeff":[1.0,-0.00050066513,-0.0014578309,0.00060374744,0.0.
.,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]}