Croatia/Kratki vodici/Oracle HTRS96

= HTRS96 koordinatni sustav i Oracle =

Uvod
Kako Oracle još uvijek ne podržava novi službeni hrvatski koordinatni sustav (http://spatialreference.org/ref/epsg/3765/), a u praksi ima potrebe za ovim koordinatnim sustavom, u nastavku slijedi definicija HTRS96 koordinatnog sustava za Oracle:

-- HTRS96

-- Definicija konverzije

INSERT INTO MDSYS.sdo_coord_ops (coord_op_id, coord_op_name, coord_op_type, source_srid,            target_srid, coord_tfm_version, coord_op_variant,             coord_op_method_id, uom_id_source_offsets,             uom_id_target_offsets,             information_source,             data_source, show_operation, is_legacy, legacy_code, reverse_op,             is_implemented_forward, is_implemented_reverse            ) VALUES (19851, 'HTRS96 / Croatia TM', 'CONVERSION', NULL,            NULL, NULL, NULL,             9807, NULL,             NULL,             'State Geodetic Administration of the Republic of Croatia.',             'EPSG', 1, 'FALSE', NULL, 1,             1, 1            );

-- Definicija parametara za konverziju

INSERT INTO MDSYS.sdo_coord_op_param_vals (coord_op_id, coord_op_method_id, parameter_id, parameter_value,            param_value_file_ref, uom_id            ) VALUES (19851, 9807, 8801, 0,            NULL, 9102            ); INSERT INTO MDSYS.sdo_coord_op_param_vals (coord_op_id, coord_op_method_id, parameter_id, parameter_value,            param_value_file_ref, uom_id            ) VALUES (19851, 9807, 8802, 16.5,            NULL, 9102            ); INSERT INTO MDSYS.sdo_coord_op_param_vals (coord_op_id, coord_op_method_id, parameter_id, parameter_value,            param_value_file_ref, uom_id            ) VALUES (19851, 9807, 8805, 0.9999,            NULL, 9001            ); INSERT INTO MDSYS.sdo_coord_op_param_vals (coord_op_id, coord_op_method_id, parameter_id, parameter_value,            param_value_file_ref, uom_id            ) VALUES (19851, 9807, 8806, 500000,            NULL, 9001            ); INSERT INTO MDSYS.sdo_coord_op_param_vals (coord_op_id, coord_op_method_id, parameter_id, parameter_value,            param_value_file_ref, uom_id            ) VALUES (19851, 9807, 8807, 0,            NULL, 9001            );

-- Dodavanje datuma

INSERT INTO sdo_datums VALUES (6761, 'Croatian_Terrestrial_Reference_System', 'GEODETIC',            '7019', '8901', '', 'EPSG', NULL, NULL, NULL, NULL, NULL, NULL,             NULL, 'FALSE', NULL);

-- Definicija projekcije

INSERT INTO sdo_coord_ref_sys VALUES (4761, 'HTRS96', 'GEOGRAPHIC2D', 6402, 6761, 6761, NULL, NULL,            NULL, NULL,             'Cadastral surveys, large scale topographic mapping, engineering survey.',             'EPSG', 'FALSE', NULL,             'GEOGCS["HTRS96",DATUM["Croatian_Terrestrial_Reference_System",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6761"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4761"]]',             NULL, 'TRUE', 'TRUE');

INSERT INTO sdo_coord_ref_system (srid, coord_ref_sys_name, coord_ref_sys_kind, coord_sys_id,            datum_id, geog_crs_datum_id, source_geog_srid,             projection_conv_id, cmpd_horiz_srid, cmpd_vert_srid,             information_source,             data_source, is_legacy, legacy_code, legacy_wktext,             legacy_cs_bounds, is_valid, supports_sdo_geometry            ) VALUES (3765, 'HTRS96 / Croatia TM', 'PROJECTED', 4400,            NULL, 6761, 4761,             19851, NULL, NULL,             'Cadastral surveys, large scale topographic mapping, engineering survey.',             'EPSG', 'FALSE', NULL, NULL,             NULL, 'TRUE', 'TRUE'            );

Napomena
S obzirom da se za GK5 i GK6 u Oracleu koriste SRID 31275 i 31276, a koji imaju KRIVE parametre za konverziju, prvo je potrebno dodati GK5 i GK6 koordinatne sustave sa točnim parametrima konverzije (vidi http://wiki.osgeo.org/wiki/Croatia/Kratki_vodici/transformacija_koordinata_cs2cs). Slijedi definicija tih koordinatnih sustava za Oracle:

-- Definicija Gauss-Kruegerove 5. i 6. zone s ispravnim parametrima

-- GK - 5. zona

Insert into SDO_DATUMS (datum_id, datum_name, datum_type, ellipsoid_id, prime_meridian_id, information_source, data_source, shift_x, shift_y, shift_z, rotate_x, rotate_y, rotate_z, scale_adjust, is_legacy) Values (1000000124, 'Bessel 1841', 'GEODETIC', 7004,8950, '', 'hr.osgeo', 550.499, 164.116,475.142, 5.80967, 2.07902, -11.62386, 0.99999445824,'FALSE');

-- Geografski sustav baziran na gornjem datumu (Bessel elipsoid) Insert into SDO_COORD_REF_SYStem(srid, coord_ref_sys_name, coord_ref_sys_kind, coord_sys_id, datum_id, geog_crs_datum_id, information_source, data_source, is_legacy, is_valid, supports_sdo_geometry) Values (1000003006, 'Bessel 1841', 'GEOGRAPHIC2D', 6405,1000000124, 1000000124,'', 'hr.osgeo', 'FALSE', 'TRUE', 'TRUE');

-- GK5 pojekcija bazirana na gore definiranom geografskom sustavu Insert into SDO_COORD_REF_SYStem (srid, coord_ref_sys_name, coord_ref_sys_kind, coord_sys_id, geog_crs_datum_id, source_geog_srid, projection_conv_id, information_source, data_source, is_legacy,is_valid,supports_sdo_geometry) Values (478005, 'GK zone 5', 'PROJECTED', 4499,1000000124, 1000003006, 18275,'', 'hr.osgeo', 'FALSE', 'TRUE', 'TRUE');

-- GK - 6. zona

Insert into SDO_DATUMS (datum_id, datum_name, datum_type, ellipsoid_id, prime_meridian_id, information_source, data_source, shift_x, shift_y, shift_z, rotate_x, rotate_y, rotate_z, scale_adjust, is_legacy) Values (1000000125, 'Bessel 1841', 'GEODETIC', 7004,8950, '', 'hr.osgeo', 550.499, 164.116,475.142, 5.80967, 2.07902, -11.62386, 0.99999445824,'FALSE');

-- Geografski sustav baziran na gornjem datumu (Bessel elipsoid) Insert into SDO_COORD_REF_SYStem(srid, coord_ref_sys_name, coord_ref_sys_kind, coord_sys_id, datum_id, geog_crs_datum_id, information_source, data_source, is_legacy, is_valid, supports_sdo_geometry) Values (1000003007, 'Bessel 1841', 'GEOGRAPHIC2D', 6405,1000000125, 1000000125,'', 'hr.osgeo', 'FALSE', 'TRUE', 'TRUE');

-- GK6 pojekcija bazirana na gore definiranom geografskom sustavu Insert into SDO_COORD_REF_SYStem (srid, coord_ref_sys_name, coord_ref_sys_kind, coord_sys_id, geog_crs_datum_id, source_geog_srid, projection_conv_id, information_source, data_source, is_legacy,is_valid,supports_sdo_geometry) Values (478006, 'GK zone 6', 'PROJECTED', 4499,1000000125, 1000003007, 18276,'', 'hr.osgeo', 'FALSE', 'TRUE', 'TRUE');

Dakle, za upis podataka iz 5. zone koristite SRID 478005, a za 6. zonu SRID 478006.

Primjer transformacije tablice s podacima iz GK5 u HTRS96:

create table T3765 AS select c.oid oid,SDO_CS.TRANSFORM(c.geometry,m.diminfo, 3765) geometry from T478005 c, user_sdo_geom_metadata m where m.table_name = 'T478005' AND m.column_name = 'GEOMETRY';