I'm trying to reproject some data from one CRS to another (SRID:27493 to SRID:3763) using the SDO_CS.TRANSFORM function.

The function works and returns no errors, but the coordinate transformation function that Oracle is using must be inadequate, because the results area inaccurate.

So, I would like to alter or define a new coordinate transformation function that suits my data.

I've realized that in the SDO_COORD_REF_SYS table there is an PROJECTION_CONV_ID attribute that should lead somewhere, but the transformation function and its parameters seem to be dispersed through several tables.

Anyone has experience in this and / or can point some manuals / tutorials?

Search for Spatial Developer Guide Chapter 6.9.6 Creating a Transformation Operation

Chapter 6.9.7 contains an example how to change the trans formation based of helmert parameter to ntv2

this is the current link for Release 18

Your Answer

 
discard

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.