Chapter 38. Data files types

The GROMA program uses different types of data files for work. Some of them are stored in the internal program format, while some have a universal format also used by other programs.

Table 38.1. File extensions used in the GROMA system

File extensionFile contentFormat
.crdCoordinate fileBinary
.crxIndex file of a coordinate fileBinary
.mesMeasured data listBinary
.mexIndex file of a measured data listBinary
.prjProjectText
.picDrawing prescription of a coordinate fileBinary
.bmpBitmap for digitalizationBinary
.rnfInformation for bitmap (transformation key, etc.)Binary
.codCode tableText
.txtText fileText
.parArea sizeText
.dstCheck distance fileText
.keyTransformation keyText
.polTransit traverseText

In some situations, GROMA automatically creates backup copies of the files (e.g. before compression, etc.) Because you usually work with more files of the same name but a different extension, the backup files can't be named with the extension .bak. For this reason, the backup file name is created by keeping the original name, but using the character"~", as the first character of the extension and the other characters of the extension are moved by one position to the right (the last character of the extension ceases).