How to combine multiple topography databases to be used in a Rural scenario

Zeina

In some cases, multiple topography tiles can be available to describe a given area. In such cases, we need to combine this data to be able to use it in ProMan in a rural scenario. There are two possible ways of doing this described below.

Creating an index file (see attached example files)

• Convert the different topography files into .tdb format using WallMan's conversion tool. WallMan support multiple file formats, please check the User Guide for an updated list.
• Knowing lower and upper corner coordinates of each .tdb and its resolution, you can then create a .tdi files that indexes the .tdbs . This can be done using a text editor. Each line of the index file should contain the following information related to the .tdb to be indexed:
  • the absolute or relative path of the the given .tdb
  • the x,y coordinates of the lower corner of the database
  • the x,y coordinates of the upper corner of the database
  • the resolution of the database

Combine the tiles two by two using ProMan

• Convert first both individual tiles (if required from geodetic) into same UTM zone (using option “UTM zone manually defined”)
• Load first *.tdb file in ProMan via File > Open Database and combine the second *.tdb file via Edit > Combine Data > Max Value
• Fill the undefined pixels using (if required) Edit > Modify Data in Area > Interpolate Data
• Save the resulting topo data into a new *.tdb file via Data > Topo Database > Save As