The Block Attribute Table

In the Key Concepts we described blocks, dynamic attributes, and how these were joined together in the Block Attribute table. An important point is tha attributes describe ffeatures (inventory conditions) and products (outcomes of management treatments) on individual blocks. Accounts are the tools that sum up inventory condition and management outcomes over groups of blocks (most often the entire forest).

Blocks, attributes and attribute tables are defined in the section called “Blocks”, the section called “Dynamic Stand Attributes” and the section called “The Block Attribute Table”. In the following section we will define the most important and commonly used data table: the block attribute table. If you would first like to explore this table, go to the section called “Exploring stand attributes in the Table Viewer” and the section called “Table Viewer”.

In the block attribute table, several categories of attributes and accounts are tabled for each block. Figure 34, “Categories of Attributes and Accounts in the Block Attribute Table” illustrates their layout within the block attribute table.

Figure 34. Categories of Attributes and Accounts in the Block Attribute Table

When Patchworks is started, the blocks GIS file is loaded, and the block table is created by joining the GIS attributes to the dynamic attributes and accounts that are generated by Patchworks.


Be careful not to use shapefile attribute names that conflict with the names used by Patchworks, i.e. the dynamic Patchworks attributes and the timing constraint attributes. For a complete list of Patchworks attribute names see the section called “The Block Attribute Table”.