*DOI: http://dx.doi.org/10.5772/intechopen.106632 GIS and Database Management for Mining Exploration*


#### **Figure 18.**

*Checking of the database to see difference and comments. Note the X\_diff case of −459 m between the planned and the waypoints recorded.*

the waypoints and the planned one is >100 m. In that case, all the minimum criteria contained in the SOP (Standard operation procedures) are not met (**Figure 18**).

Data are declared invalid when they do not meet primary criteria of valid data, nor the additional ones. In that case, the point has to be collected again.

#### **7.2 Validation of rock**

Validation of rock sampled and observed is basically done by following the tracking of the geologists. If all the tracks cross the sampled and observed points, thus all the points are considered valid. In the following map, all the points are considered valid because the tracking confirms it to be so (**Figure 19**).

#### **7.3 Contribution of our work**

#### *7.3.1 Data and their reliability*

Following the work we achieved during the project, we learned that data taken on the field act as pointers used to determine whether or not the company will be a failure or a success. Attention needs to paid so as not to spend money to go back to get data which was not well collected. Thus, it is necessary to ensure as much as possible, that these data are representative and comprise significant geological information to understand them. Global positioning system coordinates of points are important. The conditions of samples and their characteristics are also important so that we can better comprehend for example whether a sample is contaminated.

Contamination for example significantly influences the obtainable quality of data. While an organic content is always present, gold can be present in a sample because of the gold panning site near like the one in Kombo Laka village at the east part of the map (**Figure 20**). During the assessment, it can be see that the village is up the sampled point and understand why an abnormal concentration of gold is present here and none in the samples near.

### **Figure 19.** *Tracking versus sampled and observed rocks.*

Some tools that mining companies and mining projects use are Database and GIS. To use them effectively ask for skills and comprehension of the whole process to take reliable data than to discard some or retaken others.
