Disabling Accuracy Files for Datum Transforms

Spectrum Spatial supports conversions between certain datums by using algorithms that help shift coordinates more accurately. A separate jar file that contains these algorithms is installed by default for each datum transform located in the Spectrum Installation Location\server\app\types directory:

By default, all of these jar files are loaded; however, their use can negatively affect the performance of certain operations. These conversions can be disabled in some cases, such as when you do not require a certain type of conversion (for example, if you have no need to convert Japanese datums) or the performance gains outweigh the benefits of accuracy at lower zoom levels.

To disable a specific transform:

  1. Stop the server.
  2. Remove the jar from the directory. Alternatively, you can rename the jar file to have a different extension (for example, .jar~) which will prevent it from being loaded.
  3. Restart the server.