Once you've chosen a group of sources to print you can further refine your choice by using the Report Settings Filter box: Typing an equation into the box causes LOGDRAFT to evaluate that equation for each source it tries to print: if the result is 0 or false then the source won't be printed.
This page provides a comprehensive treatment of the LOGDRAFT math functions you'll need to specify complex filters.
- Filters for scaled subsurface reports such as boring logs and profiles compare information entered for your boring's source heading such as groundwater depths, elevations, boring numbers, stations, etc. (Recall that heading information is information that is about the entire boring instead of, for example just a single sample.)
In contrast, filters for data summaries that just provide lists of data (such as the samples shown in this figure and this figure) compare each line of data to be printed to see if it passes the filter.
Here are some sample filters:
| Filter | Use |
DRILLER="Keystone Drilling" | only prints borings that were made by Keystone Drilling |
WDEPTH1<10 | only prints borings where the groundwater was closer than 10 feet (or meters) to the surface. Borings where no groundwater was encountered will not be printed |
DRILL_RIG="Hand Auger" | only reports sources which were explored with a hand auger |
DATE(BDATE)>DATE("03/01/09") | prints borings started after March 1, 2009 (this could also mean "print borings started after January 3, 1999", depending upon the Date setting in your Windows Control Panel) |
Sample Filters