## 3 Results
### Results of CET Application on WV-Derived Models
is smaller within the results of this tool than on generalized TM 1:25,000 maps (Table 5). \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**ID**} & \multirow{2}{*}{\
\begin{tabular}{c} **Island** \\ **Name** \\ \end{tabular} } & \multicolumn{4}{c}{**Total Area (ha)**} & \multicolumn{4}{c}{**Total Area (km\({}^{2}\))**} \\ \cline{3-8}  & & \multicolumn{1}{c}{
\begin{tabular}{c} **TM** \\ **(1:25,000)** \\ \end{tabular} } & \multirow{2}{*}{[14]} & \multirow{2}{*}{**CET-WV**} & \multirow{2}{*}{[14]} & \multirow{2}{*}{**CET-WV**} & \multirow{2}{*}{[14]} & \multirow{2}{*}{**CET-WV**} \\ \cline{1-1}  & & & & & & & \\ \hline
1 & _Is_ & 1655.48 & 1658.08 & 1662.25 & 16.555 & 16.581 & 16.622 \\
2 & _Rava_ & 363.76 & 360.83 & 367.93 & 3.638 & 3.608 & 3.679 \\
3 & _Knezak_ & 36.78 & 36.33 & 36.90 & 0.368 & 0.363 & 0.369 \\
4 & _[PERSON]_ & 20.04 & 20.32 & 20.40 & 0.200 & 0.203 & 0.204 \\
5 & _[PERSON]_ & 13.76 & 14.16 & 14.35 & 0.138 & 0.142 & 0.143 \\
6 & _[PERSON]_ & 9.03 & 8.85 & 9.28 & 0.090 & 0.089 & 0.093 \\
7 & _[PERSON]_ & 8.98 & 8.21 & 9.12 & 0.083 & 0.082 & 0.091 \\
8 &
\begin{tabular}{c} _[PERSON]_ \\ _(Rava)_ \\ \end{tabular} & 8.32 & 8.72 & 8.33 & 0.090 & 0.087 & 0.083 \\
9 &
\begin{tabular}{c} _[PERSON]_ \\ _(Iz)_ \\ \end{tabular} & 6.85 & 6.91 & 7.11 & 0.068 & 0.069 & 0.071 \\
10 &
\begin{tabular}{c} _[PERSON]_ \\ _(Iz)_ \\ \end{tabular} & 3.69 & 3.30 & 3.95 & 0.033 & 0.033 & 0.040 \\
11 & _[PERSON]_ & 3.32 & 3.93 & 3.40 & 0.037 & 0.039 & 0.034 \\
12 & _[PERSON]_ & 2.69 & 2.51 & 2.72 & 0.027 & 0.025 & 0.027 \\
13 & _[PERSON]_ & 2.44 & 2.66 & 2.65 & 0.0244 & 0.0266 & 0.0265 \\
14 & _[PERSON]_ & 2.03 & 2.02 & 2.17 & 0.0203 & 0.0202 & 0.0217 \\
15 & _[PERSON]_ & 0.97 & 1.07 & 1.10 & 0.0097 & 0.0107 & 0.0110 \\
16 & _[PERSON]_ & 0.33 & 0.42 & 0.44 & 0.0033 & 0.0042 & 0.0044 \\
17 & _[PERSON]_ & 0.18 & 0.17 & 0.27 & 0.0018 & 0.0017 & 0.0027 \\
18 & _[PERSON]_ & 0.17 & 0.21 & 0.23 & 0.0017 & 0.0021 & 0.0023 \\
19 & _[PERSON]_ & - & 0.002 & 0.005 & - & 0.00020 & 0.000048 \\
20 & _[PERSON]_ & - & 0.0004 & 0.0010 & - & 0.000004 & 0.000010 \\ \hline Total area & 2138.81 & 2138.71 & 2152.60 & 21.388 & 21.387 & 21.526 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Extracted area of the Iz-Rava island group (Red-labeled islands characterize a large presence of shadow-induced errors, which significantly raised the total island area extracted by the tool developed in [14]). It should be noted that two very small rocks were detected and mapped by CET within the Iz-Rava island group (Figure 2A,B and Figure 9), which have not been mapped during the earlier coastline mapping efforts [50]. Due to their very small size (Sika = 48 m\({}^{2}\); Garofulin = 10 m\({}^{2}\)), these rocks have not been detectable within previous mapping efforts, and as a result, they have not been counted in an official number of islands, islets, and rocks or rocks awash in Croatia. As seen in Figure 9. Garofulin (10 m\({}^{2}\)) is a very small and low rock sticking out from shallow areas between Iz and Knezak islands, which posed a serious threat for local navigation. For that reason, it was originally marked with red paint, while later on, the small light indicator was built on top of it. Sika is by area slightly larger than Garofulin, but it is much lower. The successful detection and mapping of these two very small rocks raised the total number of islands, islets, and rocks within the Iz-Rava island group from 18 to 20 while also raising the total (but obviously not final) official number for the Croatian coast from 1246 to 1248. Both Sika and Garofulin are not represented in TM 1:25000 maps, and therefore have not been mapped and counted within earlier mapping efforts carried within [50]. Compared results are clearly indicating that the developed CET achieved better coastline extraction results, with a significant improvement in the detail of extraction, in regard to both the generalized official state TM 1:25,000 maps and the existing tested tool.