%\documentclass[crop,border={0.5cm 0.5cm 0.5cm 0.5cm}]{standalone}%[crop ili preview]
%\documentclass[convert={density=600,size=1080x800,outext=.png}]{standalone}
\documentclass[convert={density=200,outext=.png}]{standalone}
\usepackage[x11names, svgnames, rgb]{xcolor}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{snakes,arrows,shapes}

\usetikzlibrary{backgrounds}
\tikzset{white background/.style={show background rectangle,tight background,
background rectangle/.style={fill=white}}}

\usepackage{amsmath}

\usetikzlibrary{calc}
\usetikzlibrary{positioning}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{math} % tikzmath, see p. 640 of the pgfmanual.
\usepackage{svgcolor} 

\begin{document}

\begin{tikzpicture}[>=stealth', white background]
\tikzstyle{vrhEL}=[draw,inner sep=8pt,fill=white, ellipse, line width=0.8pt]
\tikzstyle{vrhPR}=[draw,inner sep=5pt,fill=white, line width=0.8pt, rounded corners]
\tikzstyle{linija}=[->, line width=0.8pt]

\begin{scope}[shift={(0,430bp)}]
\node[vrhEL] (MR2) at (36.0bp,443.5bp) {COMPARISONS};
\node[vrhPR] (V11) at (211.5bp,531.0bp) {COMPARISON\_EXAMS};
\node[vrhPR] (V12) at (211.5bp,506.0bp) {COMPARISON\_ECTS};
\node[vrhPR] (V13) at (211.5bp,481.0bp) {COMPARISON\_GRADES};
\node[vrhPR] (V14) at (211.5bp,456.0bp) {COMPARISON\_OBLIGATIONS};
\node[vrhPR] (V15) at (211.5bp,431.0bp) {STATUS\_STUDENTS};
\node[vrhPR] (V20) at (211.5bp,406.0bp) {ECTSAVG\_STUDY};
\node[vrhPR] (V21) at (211.5bp,381.0bp) {ECTSAVG\_COURSE};
\node[vrhPR] (V22) at (211.5bp,356.0bp) {AVGGRADE\_COURSE};
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\draw[linija,looseness=0.7] (MR2) to[out=60, in=180] node[above=1pt,pos=0.6] {0.8} (V12);
\draw[linija] (MR2) to[out=50, in=180] node[above,pos=0.75] {0.9} (V13);
\draw[linija] (MR2) to[out=20, in=180] node[above] {0.6} (V14);
\draw[linija] (MR2) to[out=-20, in=180] node[above] {0.7} (V15);
\draw[linija] (MR2) to[out=-50, in=180] node[above,pos=0.55] {0.8} (V20);
\draw[linija] (MR2) to[out=-60, in=180] node[above,pos=0.75] {0.8} (V21);
\draw[linija] (MR2) to[out=-70, in=180] node[above,pos=0.75] {0.7} (V22);
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\begin{scope}[shift={(170bp,0bp)}]
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\node[vrhPR] (V33) at (427.5bp,990.0bp) {BADGES\_COMPARISON};
\node[vrhPR] (V34) at (427.5bp,965.0bp) {BADGES\_COLLECTING};
\node[vrhPR] (V35) at (427.5bp,940.0bp) {AWARDS};
\node[vrhPR] (V36) at (427.5bp,915.0bp) {COMPETITIONS};
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\draw[linija] (MR3) to[out=20,in=180] node[above] {0.8} (V34);
\draw[linija] (MR3) to[out=-10,in=180] node[above] {0.8} (V35);
\draw[linija] (MR3) to[out=-50,in=180] node[above] {0.7} (V36);
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\begin{scope}[shift={(170bp,680bp)}]
\node[vrhEL] (MR1) at (231.5bp,142.5bp) {PLANNING};
\node[vrhPR] (V8) at (427.5bp,180.0bp) [draw,rectangle] {NOTIFICATIONS\_DEADLINES};
\node[vrhPR] (V24) at (427.5bp,155.0bp) [draw,rectangle] {PPLAN\_COURSE};
\node[vrhPR] (V25) at (427.5bp,130.0bp) [draw,rectangle] {PPLAN\_STUDY};
\node[vrhPR] (V26) at (427.5bp,105.0bp) [draw,rectangle] {PPLAN\_MONITORING};
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\draw[linija] (MR1) to[out=20,in=180] node[above] {0.8} (V24);
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\draw[linija] (MR1) to[out=-50,in=180] node[above] {0.7} (V26);
\end{scope}

\begin{scope}[shift={(170bp,65bp)}]
\node[vrhEL] (MR5) at (231.5bp,628.5bp) {PREDICTIONS};
\node[vrhPR] (V16) at (427.5bp,666.0bp) {PREDICTION\_COURSE};
\node[vrhPR] (V17) at (427.5bp,641.0bp) {PREDICTION\_YEAR};
\node[vrhPR] (V18) at (427.5bp,616.0bp) {PREDICTION\_ECTS};
\node[vrhPR] (V19) at (427.5bp,591.0bp) {PREDICTION\_PROGRAM};
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\draw[linija] (MR5) to[out=20,in=180]  node[above] {1} (V17);
\draw[linija] (MR5) to[out=-10,in=180]  node[above] {0.7} (V18);
\draw[linija] (MR5) to[out=-50,in=180] node[above] {0.7} (V19);
\end{scope}

\begin{scope}[shift={(0bp,140bp)}]
\node[vrhEL] (MR4) at (36.0bp,555.0bp) {TEACHERS};
\node[vrhPR] (V31) at (211.5bp,577.0bp) {TEACHERS\_CONTEVAL};
\node[vrhPR] (V32) at (211.5bp,533.0bp) {TEACHERS\_FEEDBACK};
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\draw[linija] (MR4) to[out=-30,in=180] node[above] {0.7} (V32);
\end{scope}

\end{tikzpicture}
\end{document}