Coordinate system

The specification OpenGIS requires that the internal storage format of the spatial objects include the coordinate system identifier (spatial referencing system identifier – SRID). The code SRID is required to add an object to the database and to further correctly reading its metric from the database.

Internal storage format, the spatial description of the geo database objects ArcSDE St_Geometry contains the code SRID.

In order to correctly perform the operations of import and export of DTM layers, it is necessary that the spatial data tables in the geo database ArcSDE have the code SRID corresponding to one of the codes EPSG for CS VN-2000: 3405, 3406 or others.

In this case, if the table is assigned a coordinate system with the code SRID that does not match the code EPSG, then such a coordinate system and projection parameters of the spatial description of objects must be properly registered in the database. At the same time, it is mandatory for them to be able to be converted to the standard EPSG-coordinate system and vice versa by means of ArcSDE stored procedures directly in the database Oracle itself.