Georeferencing images in georaster

Question

I've been having problems with SRID too. I can load, georeference and view (in Mapviewer for example) the FIRST image on the right spot on the earth. I am using SRID = 8307 - which is 'Geographic Latitude/Longitude').
Everything looks great.
I am not using a world file while doing the raster import
but calling the sdo_geor.georefence afterwards.
When I try to load a SECOND image, with or without a world file, I get errors like this :
My code (used to load 1st and 2nd image, except for id change):
declare
geor SDO_GEORASTER;
begin
delete from georaster_table where georid = 2;
insert into georaster_table
values( 2, 'TIFF', sdo_geor.init('rdt_geor', 2) );
select georaster into geor
from georaster_table where georid = 2 for update;
sdo_geor.importFrom(geor, '', 'TIFF', 'file', '/tmp/Kaechon_strip.tif');
update georaster_table set georaster = geor where georid = 2;
commit;
end;
ERROR :
declare
ERROR at line 1:
ORA-29877: failed in the execution of the ODCIINDEXUPDATE routine
ORA-13365: layer SRID does not match geometry SRID
ORA-06512: at "MDSYS.SDO_INDEX_METHOD_10I", line 348
ORA-06512: at line 1
ORA-06512: at line 10
I don't really know what this means ... more later
If I use the above script to load it does not insert any raster loads, probably becuase of the non-commit.
If I use the java loader it will insert rows into the table and give me the same error. Additionally, it will let me run a "sdo_geor.georeference" command with no complaints ("PL/SQL procedure successfully completed") but isSpatialReferenced, getModelSRID, getSpatialResolutions show no effect. For example:
GEORID isSpatialR isRectifie isOrthoRec
1 TRUE TRUE
2
GEORID ModelSRID Spatial Resolutions
1 8307 SDO_NUMBER_ARRAY(5.5737E-06, 5.5737E-06)
2
... Later...Anyway, my theory of why the load fails is because the SRID of the table is now non-zero, specifically 8307 from the first image, and the loader wants to index it using the new unset SRID.
I tried to set the SRID to 8307 before loading using sdo_geor.setModelSRID. It politely replies "PL/SQL procedure successfully completed" but there appears to be no change:
GEORID ModelSRID Spatial Resolutions
1 8307 SDO_NUMBER_ARRAY(5.5737E-06, 5.5737E-06)
2
I get similar results when I try to ignore the error using the java loader since it seems to have loaded the raster lines. I try to georeference it and it happily says everything is okay but generating the spatial extent fails :
ERROR at line 1:
ORA-13430: the GeoRaster object has null attribute(s)
ORA-06512: at "MDSYS.MD", line 1723
ORA-06512: at "MDSYS.MDERR", line 8
ORA-06512: at "MDSYS.SDO_GEOR", line 893
ORA-06512: at line 4
(Sorry I fogot to save the results of the generateSpatialExtent call).
Anyway, to ask a related question: am I thinking about SRID incorrectly in the first place? I would think that most people would want to use SRID = 8307 since most most folks think in terms of Lat and long. World files are often UTM, so that would be my guess for 2nd most common srid. Are most people using georaster without georeferencing the images?
Thanks.

Answer 1

Hi Rodney,
This is a workflow issue that I think is resolved in the next georaster version. For now, if you can drop your spatial index while loading new georaster imagery into a table, or not spatially index the table until all imagery is loaded that will be the best short term solution.
In answer to your questions:
You are thinking about SRID correctly.
Most people are generating indexes on the spatial extent.
Most people are georeferencing their data.
I'm not sure what the most common SRID people use for their imagery.
Hope this helps..