German election 2009

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This little application of JSXGraph shows the results of the German election in 2009. A much more elaborate version is Wahlatlas from Michael Neutze.

Ergebnisse der Bundestagswahl 2009

CDU/CSU SPD FDP Die Grünen Die Linke NPD REP DVU Die Piraten
Wahlbeteiligung
© Bundeswahlleiter, Statistisches Bundesamt, Wiesbaden 2008, Wahlkreiskarte für die Wahl zum 17. Deutschen Bundestag

Geoinformationen © Bundesamt für Kartographie und Geodäsie www.bkg.bund.de

The underlying JavaScript code

<form>
    <input type="radio" value="0" onclick="selectParty(0);" name="parties" checked='checked'>CDU/CSU
    <input type="radio" value="1" onclick="selectParty(1);" name="parties">SPD
    <input type="radio" value="2" onclick="selectParty(2);" name="parties">FDP
    <input type="radio" value="3" onclick="selectParty(3);" name="parties">Die Gr&uuml;nen
    <input type="radio" value="4" onclick="selectParty(4);" name="parties">Die Linke
    <input type="radio" value="5" onclick="selectParty(5);" name="parties">NPD
    <input type="radio" value="6" onclick="selectParty(6);" name="parties">REP
    <input type="radio" value="7" onclick="selectParty(7);" name="parties">DVU
    <input type="radio" value="8" onclick="selectParty(8);" name="parties">Die Piraten
    <br />
    <input type="radio" value="9" onclick="selectParty(9);" name="parties">Wahlbeteiligung
    <br />
</form>
    var minX =-289319.4,
        maxY = 6827620,
        maxX = 351315.7,
        minY = 5960587,
        brd,
        points = [],
        len = data.length, // from germany.js
        lastWk = null,
        lastWkNr = 0,
        i, j, k, col = 0;
    
    var CDUcols = ['#d3e9fe','#8db0fe','#405dff','#002ba5','#001654'];
    var SPDcols = ['#ffceb8','#fe946a','#f83a1f','#bb0000','#7e0900'];
    var FDPcols = ['#f9feae','#fff95e','#fee80c','#fecc12','#ffc400'];
    var GRUENcols = ['#e4de4d','#b5c213','#508229','#508229','#062f00'];
    var LINKScols = ['#fed0f5','#f3a3ff','#cb6cff','#952aea','#640390'];
    var RECHTScols = ['#fee284','#d3a936','#ab6c00','#714702','#492e00'];
    var PIRATENcols = ['#d3d3d3','#a9a9a9','#4a4a4a','#131313','#ff8800'];
    var BETcols = ['#f8fde6','#e4e5b8','#889780','#354f4f','#002a2d'];
    var CDUCSU = new Array(299);
    var SPD = new Array(299);
    var FDP = new Array(299);
    var GRUEN = new Array(299);
    var LINKS = new Array(299);
    var NPD = new Array(299);
    var REP = new Array(299);
    var DVU = new Array(299);
    var PIRATEN = new Array(299);
    var Zweit = new Array(299);
    var Beteiligung = new Array(299);    
    var wkNamen = new Array(299);
    var wkCurves = new Array(300);
    
    for(i=0;i<300;i++) {
        wkCurves[i] = [];
    }
    
    for(i=5; i<337; i++) {
        if(wahldata[i*135+1] != "") { // keine Leerzeile
            if(wahldata[i*135+3] != "99" && wahldata[i*135+3] != "") { // kein Bundesland, auch nicht Bundesgebiet
                if(wahldata[i*135+3] == "9") {
                    CDUCSU[ wahldata[i*135+1] ] = wahldata[i*135+42]/wahldata[i*135+18]*100; // CSU
                }
                else {
                    CDUCSU[ wahldata[i*135+1] ] = wahldata[i*135+26]/wahldata[i*135+18]*100; // CDU
                }
                
                SPD[ 1*wahldata[i*135+1] ] = (wahldata[i*135+22]/wahldata[i*135+18]*100).toFixed(1);
                FDP[ 1*wahldata[i*135+1] ] = (wahldata[i*135+30]/wahldata[i*135+18]*100).toFixed(1);
                GRUEN[ 1*wahldata[i*135+1] ] = (wahldata[i*135+38]/wahldata[i*135+18]*100).toFixed(1);
                LINKS[ 1*wahldata[i*135+1] ] = (wahldata[i*135+34]/wahldata[i*135+18]*100).toFixed(1);
                NPD[ 1*wahldata[i*135+1] ] = (wahldata[i*135+46]/wahldata[i*135+18]*100).toFixed(1);
                REP [ 1*wahldata[i*135+1] ] = (wahldata[i*135+50]/wahldata[i*135+18]*100).toFixed(1);
                DVU [ 1*wahldata[i*135+1] ] = (wahldata[i*135+102]/wahldata[i*135+18]*100).toFixed(1);
                PIRATEN [ 1*wahldata[i*135+1] ] = (wahldata[i*135+118]/wahldata[i*135+18]*100).toFixed(1);
                Zweit[ 1*wahldata[i*135+1] ] =  wahldata[i*135+18];
                Beteiligung [ 1*wahldata[i*135+1] ] =  (wahldata[i*135+18]/wahldata[i*135+4]*100).toFixed(1);
                wkNamen[ 1*wahldata[i*135+1] ] =  wahldata[i*135+2];
            }
        }
    }    

    function selectParty(i) {
        brd.suspendUpdate();
        if(i==0) { // CDU/CSU
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getCSUcolor(j));
                }
            }
        }    
        else if(i==1) { // SPD
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getSPDcolor(j));
                }
            }
        }
        else if(i==2) { // FDP
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getFDPcolor(j));
                }
            }
        }   
        else if(i==3) { // GRUEN
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getGRUENcolor(j));
                }
            }
        }  
        else if(i==4) { // LINKS
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getLINKScolor(j));
                }
            }
        } 
        else if(i==5) { // NPD
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getNPDcolor(j));
                }
            }
        } 
        else if(i==6) { // REP
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getREPcolor(j));
                }
            }
        }
        else if(i==7) { // DVU
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getDVUcolor(j));
                }
            }
        }   
        else if(i==8) { // Piraten
            for(var j=1;j<300;j++) {
                for(var k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getPIRATENcolor(j));
                }
            }
        }  
       else if(i==9) { // Wahlbeteiligung
            for(j=1;j<300;j++) {
                for(k=0; k< wkCurves[j].length; k++) {
                    wkCurves[j][k].setProperty('fillColor:'+getBETEILIGUNGcolor(j));
                }
            }
        }          
        brd.unsuspendUpdate();
    }
    
    function getSPDcolor(col) {
        if(SPD[col] < 18) { return SPDcols[0]; }
        else if(SPD[col] >= 18 && SPD[col] < 23) { return SPDcols[1]; }
        else if(SPD[col] >= 23 && SPD[col] < 28) { return SPDcols[2]; }
        else if(SPD[col] >= 28 && SPD[col] < 33) { return SPDcols[3]; }
        else { return SPDcols[4]; }
    }
    
    function getCSUcolor(col) {
        if(CDUCSU[col] < 30) { return CDUcols[0]; }
        else if(CDUCSU[col] >= 30 && CDUCSU[col] < 35) { return CDUcols[1]; }
        else if(CDUCSU[col] >= 35 && CDUCSU[col] < 40) { return CDUcols[2]; }
        else if(CDUCSU[col] >= 40 && CDUCSU[col] < 45) { return CDUcols[3]; }
        else { return CDUcols[4]; }
    }   
    
    function getFDPcolor(col) {
        if(FDP[col] <= 10) { return FDPcols[0]; }
        else if(FDP[col] > 10 && FDP[col] <= 13) { return FDPcols[1]; }
        else if(FDP[col] > 13 && FDP[col] <= 16) { return FDPcols[2]; }
        else if(FDP[col] > 16 && FDP[col] <= 19) { return FDPcols[3]; }
        else { return FDPcols[4]; }
    } 
    
    function getGRUENcolor(col) {
        if(GRUEN[col] < 6) { return GRUENcols[0]; }
        else if(GRUEN[col] >= 6 && GRUEN[col] < 10) { return GRUENcols[1]; }
        else if(GRUEN[col] >= 10 && GRUEN[col] < 14) { return GRUENcols[2]; }
        else if(GRUEN[col] >= 14 && GRUEN[col] < 20) { return GRUENcols[3]; }
        else { return GRUENcols[4]; }
    }   

    function getLINKScolor(col) {
        if(LINKS[col] < 12) { return LINKScols[0]; }
        else if(LINKS[col] >= 12 && LINKS[col] < 19) { return LINKScols[1]; }
        else if(LINKS[col] >= 19 && LINKS[col] < 26) { return LINKScols[2]; }
        else if(LINKS[col] >= 26 && LINKS[col] < 33) { return LINKScols[3]; }
        else { return LINKScols[4]; }
    }   
    
    function getNPDcolor(col) {
        if(NPD[col] < 1) { return RECHTScols[0]; }
        else if(NPD[col] >= 1 && NPD[col] < 2) { return RECHTScols[1]; }
        else if(NPD[col] >= 2 && NPD[col] < 3) { return RECHTScols[2]; }
        else if(NPD[col] >= 3 && NPD[col] < 4) { return RECHTScols[3]; }
        else { return RECHTScols[4]; }
    }

    function getREPcolor(col) {
        if(REP[col] <= 0.5) { return RECHTScols[0]; }
        else if(REP[col] >= 0.5 && REP[col] <= 0.75) { return RECHTScols[1]; }
        else if(REP[col] >= 0.75 && REP[col] <= 1) { return RECHTScols[2]; }
        else if(REP[col] >= 1 && REP[col] <= 1.25) { return RECHTScols[3]; }
        else { return RECHTScols[4]; }
    }   

    function getDVUcolor(col) {
        if(DVU[col] < 0.5) { return RECHTScols[0]; }
        else if(DVU[col] >= 0.5 && DVU[col] < 0.75) { return RECHTScols[1]; }
        else if(DVU[col] >= 0.75 && DVU[col] < 1) { return RECHTScols[2]; }
        else if(DVU[col] >= 1 && DVU[col] < 1.25) { return RECHTScols[3]; }
        else { return RECHTScols[4]; }
    }
    
    function getPIRATENcolor(col) {
        if(PIRATEN[col] < 1) { return PIRATENcols[0]; }
        else if(PIRATEN[col] >= 1 && PIRATEN[col] < 1.5) { return PIRATENcols[1]; }
        else if(PIRATEN[col] >= 1.5 && PIRATEN[col] < 2) { return PIRATENcols[2]; }
        else if(PIRATEN[col] >= 2 && PIRATEN[col] < 2.5) { return PIRATENcols[3]; }
        else { return PIRATENcols[4]; }
    }  
    
    function getBETEILIGUNGcolor(col) {
        if(Beteiligung[col] < 66) { return BETcols[0]; }
        else if(Beteiligung[col] >= 66 && Beteiligung[col] < 69) { return BETcols[1]; }
        else if(Beteiligung[col] >= 69 && Beteiligung[col] < 72) { return BETcols[2]; }
        else if(Beteiligung[col] >= 72 && Beteiligung[col] < 75) { return BETcols[3]; }
        else { return BETcols[4]; }
    }      
    
    brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[minX-1000,maxY+1000,maxX+1000,minY-1000],
                                        keepaspectratio:true});

    for(i=0;i<len;i++) {
        if(i%6==1) {
            lastWk = data[i];
        }
        else if(i%6==0) {
            lastWkNr = data[i];
        }        
        else if(i%6 == 5) {
            points.push([data[i],lastWk,lastWkNr]);
        }
    }

    function createCurve(area)  {
        var compos = area[0].split(';'), // Zusammenhangskomponenten
            x = [], y = [],
            c = [], num, i, a, graph, k, a;
            
        num = compos.length;
        for (k=0;k<num;k++) {
            x = []; y = []; c = [];
            xy = compos[k].split(',');            
            len = xy.length;
            for(i=0;i<len;i++) {
                a = xy[i].split(' ');
                c.push(new JXG.Coords(JXG.COORDS_BY_USER, [1*a[0], 1*a[1]], brd));
            }
            c = JXG.Math.Numerics.RamerDouglasPeuker(c,1.2);
            len = c.length;
            for (i=0;i<len;i++) {
                x.push(c[i].usrCoords[1]);
                y.push(c[i].usrCoords[2]);
            }
            graph = brd.createElement('curve', [x,y], 
                        {fillColor:getCSUcolor(area[2]),
                         highlightFillColor:'yellow',
                         strokeWidth:1,strokeColor:'black',highlightStrokeColor:'black'});
            wkCurves[ [area[2]] ].push(graph);
            if(k==0) {                 
                JXG.addEvent(graph.rendNode, 'mouseover', (function(g){ return function(){g.highlight(); };})(graph), graph);
                JXG.addEvent(graph.rendNode, 'mouseout', (function(g){ return function(){g.noHighlight();};})(graph), graph);
            }
            graph.hasPoint = function(){return false; };
        }
    }

    function final() {
        brd.unsuspendUpdate();
    }

    brd.suspendUpdate();
    JXG.timedChunk(points, createCurve, null, final);