87 
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ched 
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Figure 6: Nautical chart Gulf of Koper (Izola Marina section) 
QUALITY CONTROL 
Quality control is very important in nautical 
cartography. Any error on the chart could cause 
great damage to vessels, environment and people. 
For this reason the whole chart production process 
was checked several times. This is also necessary 
to meet the requirements of IHO standards and 
high precision of data charted. The following quality 
controls were conducted: 
• participation of cartographer in the 
hydrographic survey on board, 
• crosscheck soundings lines according to IHO 
specifications, 
• checking of tide gauge readings with predicted 
values, 
• fair sheets were checked immediately after the 
completion of survey, 
• selection of soundings was checked by several 
independent processes, 
• cartographic procedures were sequentially 
checked directly at IGF, 
• transformations of coordinates were checked 
with comparison to other maps and charts, 
• light characteristics were checked by Slovenian 
Port Authority, 
• several test prints of the chart were made 
before the final print, 
• printing was supervised by cartographic 
experts, 
• several points on the field were checked with 
precise (P-coded) GPS receiver in cooperation 
with Navoceano. 
CONCLUSION 
The Gulf of Koper chart was presented at the 
Mediterranean and Black Seas Hydrographic 
Commission (MBSHC) in Split, Croatia. This first 
Slovenian chart is a great step forward for the 
safety of navigation in the Slovenian part of 
Adriatic, but there is still a lot of work to do in this 
field. Already planned are production of the INT 
version of Gulf of Koper chart, both versions of the 
Gulf of Piran chart (figure 5) and the Gulf of Trieste 
chart in cooperation with the Italian and Croatian 
hydrographic offices. A complete survey of Gulf of 
Piran is planned for a future date. All data will be 
processed for electronic navigation chart (ENC) and 
included in the European distribution network 
(Radovan, 1994-98). The Ministry of Transport and 
Communications is very active in gaining full 
membership of the IHO and in forming the maritime 
law. This is all aimed towards full competence of 
Slovenia in the international maritime society.