GGU-STRATIG: Petrography: interpretation using SEP 2 abbreviations
The Petrography abbreviation range comprises the SEP 2 abbreviations for main soil types and accessory soil types. Additionally, abbreviations for characteristics can be entered in any position in the petrography area, e.g. information on grain roundness for a fine gravel constituent or on lime content. The abbreviations and corresponding long texts can be found under "Preferences/Abbreviations (SEP)".
The main and accessory soil types in the abbreviation line are separated by a semicolon. This separation impacts only the allocation of the long texts in the 3 lines of long text, A1, A2 and B. It does not matter which of the 3 petrography ranges the abbreviations are taken from. For the interpretation only the generic term petrography counts. When allocating the long texts everything before the semicolon is treated as a main soil type. Everything following the semicolon is treated as an accessory soil type. The lines in which the long texts for main and accessory soil types are interpreted can be specified by pressing the "Long texts"button in the "Preferences/Abbreviations (SEP)" dialog box.
Quality information is noted by a number associated with the corresponding abbreviation. They are allocated as follows: "1" = "very slightly", "2" = "slightly", "4" ="strongly", "5" = "very strongly". It is not necessary to enter the "3" = "medium".
In GGU-STRATIG, the colours and soil signatures are defined via code numbers for all soil types available in DIN 4023. The soil signatures for the code numbers are permanently stored. You can adjust the soil colours for correct colour reproduction on your printer or plotter .
A maximum of four code numbers can be assigned for subsequent graphic representation of the soil types. When interpreting a SEP 2 abbreviation line, the four code boxes in the lower right area of the editor box are filled from left to right. The first two code boxes are intended for main soil types or secondary soil types with a strong mixture content. The last two code boxes are intended for secondary soil types with a lower proportion of mixture. If a number is entered in the first two code boxes, the corresponding soil signatures are displayed in the entire layer. If an entry is made in the last two code boxes, the signatures are only displayed in one half of the stratum. The distribution of the soil signatures is determined by a random generator for optical reasons.
If there is only 1 main soil type and 1 subsidiary soil type with a small mixture share, the second code box should not be used, as otherwise too many soil signatures will be used for the subsidiary soil type. In this case, enter the "#" character as a placeholder for the second code box. The code box is then filled with the number 0 and only the third code box with the code for the subsoil type. You can also use the placeholders if, for example, you want to describe a fill, but the explanatory soil types are not to be displayed.
Example 1:
The following layer is to be entered:
Layer base = 2.35 m
Medium sand, slightly fine-sandy, brown, soil group SE,
stratigraphy, genesis and samples not present
The abbreviation line is:
2.35// mS; #, fs2// bn/ SaE
After pressing the "Interpret abbreviations" button, all entries are converted into long texts. The "Medium sand" is written in text line A1, "slightly fine-sandy" in text line B.Example 2:
A fill layer is to be entered and displayed with the corresponding signature and colour. However, the soil types contained in brackets are to be interpreted without signature and colour, only as long texts.
Layer base = 2.35 m
Medium sand, slightly fine-sandy, brown, soil group SE,
stratigraphy, genesis and samples not present
The abbreviation line is:
2,35// A;#,#,#,(mS, fs2)// bn/ KSaE
After pressing the "Interpret abbreviations" button, all entries are converted into long texts. "Fill" is written in text line A1, the other soil types in brackets in text line B. The code boxes are filled with 90, 0, 0, 0 and thus only the signature and colour for the fill are shown.
When saving a borehole as a SEP 2 file the "#" sign is not adopted, thus retaining data compatibility to the SEP 2 program.
If two main soil types are entered (= code numbers in the first two code boxes) the colour of the stratum is divided, if the "Use the colours of the two main soil types" check box is activated as default. If this colour division is not wanted, the colour division for this layer can be turned off by deactivating the check box. The colour division for stratigraphic logs can be turned off globally by going to the menu item "Preferences/General" and using the check box there.
Please note that when opening old files created using GGU-STRATIG older than main version 10, the "Use the colours of the two main soil types" check box is inactive. When using these old logs the program first checks whether there are two upper case soil type descriptors at the beginning and end of the line in text line A1. Only then is the colour visualisation divided for two main soil types (= code numbers in the first two code boxes). You can use the old method for advanced editing or or activate colour division globally using the check box provided in the menu item "Preferences/General". The strata are then adjusted correspondingly by the program.
If an input is not required in an area, simply leave the area empty - in the above example: stratigraphy and genesis. The slash to the next input area follows directly.
Unnecessary input areas at the end of the abbreviation line are simply left blank - in the above example: no samples. The line ends after the soil group abbreviation.
Free text can be entered into any area. The free text is set in inverted commas. For example:
2.35// 'Building rubble', mS; fs2, u4// bn// SaU2
The free text Building rubble will thus be interpreted into the "Petrography" area in front of medium sand.
If you would like to have the long text in brackets, simply enter these at the desired position in the abbreviation line. For example:
2.35// 'Building rubble', (mS); fs2, u4// bn/ SaU2
Medium sand, in long text, will then be placed in brackets.