Pitney Bowes MapInfo Vertical Mapper - Manual (Page 154)

Splicing Grids Together
152
Vertical Mapper 3.7
You can update specific areas of an existing grid. This is best done by creating polygonal regions
around the areas to be updated, i.e., the new subdivision or building footprint. Attach the appropriate
information to these regions, for example, “urban” for the subdivision and the building heights to the
footprint. Use the Region to Grid command to convert these regions to a grid. Be sure that the
projection and the grid units are the same. Use the Grid Splicer command to stamp these “region
grids” on the grid to be updated.
1. In the Grid Manager, click the Tools button and choose the Splicer command .
2. In the Grid Splicer dialog box, choose a grid from the Begin Splicing With: list.
3. From the Spliceable Grids list, choose a second grid and click the Add button.
4. Choose the type of splicing by doing one of the following:
• Click the Stamp button to combine two or more grids. In the overlapping areas, the cell
values of one input grid will overwrite the values of the other grids.
• Click the Merge button to combine two or more grids and choose a calculation type from the
associated list. In the overlapping areas, a mathematical calculation is performed to
determine the new grid value.
5. In the File name box, type a new file name or accept the default.
6. Click the OK button.
Exploring the Grid Splicer Dialog Box
The Grid Splicer dialog box enables you to manage all of the grid files used in the splicing process.
The Begin Splicing With list enables you to specify which grid will be used as the reference grid for
the splicing operation.