I’m doing extracting zone value from a section to certain position defined before, so called station number in map info. There are 7 section, elongated north to south one of them, and the remaining is elongated west to east. I’m doing this so I can see the distribution of zone value laterally. I was made it only in surface 0, 25, 50, 75, 100. We found a discontinuity in surface 50. The distribution seems go wrong, because the gridding of 25 and 75 are continued. I don’t know, so I cut it more detail, in every 10 meter. When I trace it in baseline (NS), i found my mistake assign false number. It assigned 1 instead of 4. Gee, since I have only 4 zone value, this is really a fatal mistake!

I fix it in this section, and start all over again over 10 surface! I didn’t find any mistake of zone value in other section last night. So I didn’t check it again. I continue gridding the file with the new baseline zone value. But hey look there still a discontinuity… I think I should review the remain section.

0h, 25h, 50h, 75h

0h, 10h, 20h, 25h, 30h, 40h, 50h, 60h, 70h

Wow… what is this???? What happen between 10 and 20 ? 20 and 25 ? We can see the continuity from 30h to 70 though.