Mengambil informasi terkait koefisien polinomial rasional (RPC) dari objek raster. Jika objek raster memiliki informasi RPC, string JSON akan dikembalikan. Jika tidak, nilai null akan dikembalikan.
Sintaksis
text ST_RPCGeoreference(raster raster_obj)Parameter
| Parameter | Deskripsi |
| raster_obj | Objek raster. |
Deskripsi
Fungsi ST_RPCGeoreference mengembalikan string JSON yang berisi parameter RPC. String ini mencakup informasi referensi untuk ruang RPC. Tabel berikut menjelaskan parameter yang didukung.
| Parameter | Deskripsi | Tipe |
| lineOff | Offset baris. | float |
| sampOff | Offset pengambilan sampel. | float |
| latOff | Offset lintang. | float |
| longOff | Offset bujur. | float |
| heightOff | Offset ketinggian. | float |
| lineScale | Rasio baris. | float |
| sampScale | Rasio pengambilan sampel. | float |
| latScale | Rasio lintang. | float |
| longScale | Rasio bujur. | float |
| heightScale | Rasio ketinggian. | float |
| lineDenCoeff | Jumlah koefisien untuk penyebut baris. Nilai valid: 1 hingga 20. | larik float |
| lineNumCoeff | Jumlah koefisien untuk pembilang baris. Nilai valid: 1 hingga 20. | larik float |
| sampNumCoeff | Jumlah koefisien untuk pembilang sampel. Nilai valid: 1 hingga 20. | larik float |
| sampDenCoeff | Jumlah koefisien untuk penyebut sampel. Nilai valid: 1 hingga 20. | larik float |
| errBias | Kesalahan bias. Kesalahan bias akar-kuadrat-rata-rata (RMS) dalam meter. Kesalahan ini terkait dengan semua titik per sumbu horizontal dalam gambar. Nilai default: -1.0. | float |
| errRandom | Kesalahan acak. Kesalahan acak RMS dalam meter. Kesalahan ini terkait dengan setiap titik per sumbu horizontal dalam gambar. Nilai default: -1.0. | float |
Contoh:
SELECT ST_RPCGeoreference(raster_obj) FROM raster_table where id=1;
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{"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]}