Combine String Files
An efficient way of storing contour strings is to have all strings for a particular contour level but not any other contour level in a single file. This means that there will be one file per contour level. Having contours stored in this manner allows for great flexibility in plotting and graphics editing of contour strings. If a DTM is required then it will be necessary to combine the contour strings into a single file. This module can be used for this purpose.
To run this function: Choose File tools > Combine/Split file options > Combine string files, or...
Define the files to be combined
Define the files which are to be combined into a single file by entering the Location and ID range.
Define method to create new file
Enter the Location and ID number of the file which is to be created.
Retain descriptions
You may choose to retain point descriptions, or not. Y or N are valid entries here.
Combine crest and toe files
This prompt relates to the special case where you may wish to combine strings from files of pit crests and toes. In this case there will be two files, a crests file and a toes file, each with a different Location name but the same ID elevations.
If you answer `Y' to nominate crest and toe files, a `crest file' will be processed at each elevation in the nominated range, and also look for and process a `toe file' if one exists at each elevation. The nominated ID range of input files are assumed to be crests, with the ``toe files'' for any elevation to have the same Location name except that the third character of the Location is a T. For example, if a series of single crest files called CRC with a range from 115,145,10 are nominated, then the toe files CRT115,145,10 will be searched following each crest file at the same level.
Start string number
Nominate the lowest string number to which the first string written to the combined file will be assigned. This number is incremented as successive strings are added to the file.
Result
A new string file is created which is the combination of all strings from the specified range of input files.