Page Comparison

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1. Here you can select a master layer. The master layer is a main layer. All columns from this layer table will be copied to newly createdcreated output table.
2. Here you can set a detail layer. The detail layer will take part in comparison process and selected data from this layer table will be used and placed in the newly created output table.
3. In this field you can select one of the spatial comparison methods.
   
4. In the Columns to append from detail layer field you can select which data from the detail layer should be placed in the Output table.
5. Here you can enter the Output table name. If the entered table name already exist the spatial merge operation will be disrupted.

How to use Spatial Merge tool

To explain how this tool works and how to use it we will use 2 layers: Windmills and District Borough. Both these tables are part of Ordnance Survey Strategi dataset and are available for free from OS website under OS OpenData licence.

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