DEVELOPING DIGITAL MAPPING TECHNIQUES

The Oklahoma Geological Survey is implementing the use of a rugged tablet computer to aid in field mapping. The purpose for implementing tablet computer mapping is to increase the efficiency of the mapping process by decreasing the number of steps used to create a geologic map. The traditional method relied on the use of paper base maps and a separate field note book. The data collected in the field is transferred to a final paper map which is digitized. The new technique uses a rugged tablet computer, GPS unit and GIS software. The software ties the whole system together it allows the real time logging of the map position as recorded by the GPS unit; consequently, the geologist uses less time locating themselves in the field, and subsequently reducing the amount of time needed in transferring collected data and compiling mapped geology later in the office. While the GPS is calculating its average position, the geologist can spend this time describing the outcrop, and input these observations directly into the software. These files are then compiled and given to the cartography department for final assembly of the digital map. Maps can then be released in GIS format on Survey websites where the general public may directly download geology shapefiles, the actual field notes of the investigator, as well as any photos taken of the described outcrops.

The biggest challenge of implementing the new technology is learning the software and deciding what parameters to include. Lithologic descriptions, strikes and dips, and outcrop locations are the most common parameters used to sort and categorize data, but the combinations are limitless.

The use of this digital mapping technique will save money and time. The digital map produced will provide a more useful format for professionals with a computer work station, or it can easily be printed out in hard-copy form for the public.