Compatibility with MapLink 3

The GDF filter that was provided with MapLink 3 has been superseded by a new filter that provides a higher level of flexibility and configurability when processing GDF data.

Existing MapLink projects that have been created using MapLink 3 will still use the MapLink 3 version of the GDF filter for existing GDF datasets when they are opened using MapLink 4. However, any new GDF datasets that are added will use the new GDF filter.

To convert a MapLink 3 GDF project to MapLink 4

• Open the MapLink 3 project.
• In each case where a GDF dataset exists within the project, add a new GDF dataset using Layer | Add Dataset.
• Define the properties for the new GDF dataset, such as input coordinate system, linear transformation and input clipping, as required.
• Move the files in the original GDF dataset to the new GDF dataset.
• Delete the original GDF dataset.

Note that you cannot create a new GDF dataset by copying an original GDF dataset, because the two versions of GDF dataset have different properties.

If necessary, you can still add MapLink 3 GDF datasets to a MapLink 4 project, by following the procedure defined below.

To add a MapLink 3 GDF dataset to a MapLink 4 project

• Close MapLink Pro Studio.
• Open the file mapl.ini (which is to be found in the MapLink \config directory) using any text editor.
• Search for the [GDF-MAPLINK3] section of the INI file.
• Run MapLink Pro Studio and either open an existing project or create a new project.
• Select Layer | Add Dataset. The Dataset Type list will now include an entry for [GDF-MAPLINK3].
• Select this entry, together with an appropriate Feature Book section, and press OK. The MapLink 3 GDF dataset will be added to the project.