geocanvas/dist/geocanvas.min.js

Functions for Working with GeoSpatial Canvas Elements

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a.lat&&a.lon?[a.lon,a.lat,a.lon,a.lat]:[a.left,a.bottom,a.right,a.top]},toPoint:bt};function wt(t,a){return a=a||5,function(t,a){var s,i,n,e,o,h,l,_,r,k,c,u="00000"+t.easting,f="00000"+t.northing;return t.zoneNumber+t.zoneLetter+(r=t.easting,k=t.northing,c=Ct(t.zoneNumber),s=Math.floor(r/1e5),i=Math.floor(k/1e5)%20,e=Mt.charCodeAt(n=c-1),o=yt.charCodeAt(n),_=!1,(h=e+s-1)>90&&(h=h-90+gt-1,_=!0),(h===pt||e<pt&&h>pt||(h>pt||e<pt)&&_)&&h++,(h===dt||e<dt&&h>dt||(h>dt||e<dt)&&_)&&++h===pt&&h++,h>90&&(h=h-90+gt-1),(l=o+i)>86?(l=l-86+gt-1,_=!0):_=!1,(l===pt||o<pt&&l>pt||(l>pt||o<pt)&&_)&&l++,(l===dt||o<dt&&l>dt||(l>dt||o<dt)&&_)&&++l===pt&&l++,l>86&&(l=l-86+gt-1),String.fromCharCode(h)+String.fromCharCode(l))+u.substr(u.length-5,a)+f.substr(f.length-5,a)}(function(t){var a,s,i,n,e,o,h,l=t.lat,_=t.lon,r=6378137,k=.00669438,c=.9996,u=vt(l),f=vt(_);h=Math.floor((_+180)/6)+1,180===_&&(h=60),l>=56&&l<64&&_>=3&&_<12&&(h=32),l>=72&&l<84&&(_>=0&&_<9?h=31:_>=9&&_<21?h=33:_>=21&&_<33?h=35:_>=33&&_<42&&(h=37)),o=vt(6*(h-1)-180+3),a=.006739496752268451,s=r/Math.sqrt(1-k*Math.sin(u)*Math.sin(u)),i=Math.tan(u)*Math.tan(u),n=a*Math.cos(u)*Math.cos(u);var x,M,y=c*s*((e=Math.cos(u)*(f-o))+(1-i+n)*e*e*e/6+(5-18*i+i*i+72*n-58*a)*e*e*e*e*e/120)+5e5,g=c*(r*(.9983242984503243*u-.002514607064228144*Math.sin(2*u)+2639046602129982e-21*Math.sin(4*u)-3.418046101696858e-9*Math.sin(6*u))+s*Math.tan(u)*(e*e/2+(5-i+9*n+4*n*n)*e*e*e*e/24+(61-58*i+i*i+600*n-2.2240339282485886)*e*e*e*e*e*e/720));return l<0&&(g+=1e7),{northing:Math.round(g),easting:Math.round(y),zoneNumber:h,zoneLetter:(x=l,M="Z",84>=x&&x>=72?M="X":72>x&&x>=64?M="W":64>x&&x>=56?M="V":56>x&&x>=48?M="U":48>x&&x>=40?M="T":40>x&&x>=32?M="S":32>x&&x>=24?M="R":24>x&&x>=16?M="Q":16>x&&x>=8?M="P":8>x&&x>=0?M="N":0>x&&x>=-8?M="M":-8>x&&x>=-16?M="L":-16>x&&x>=-24?M="K":-24>x&&x>=-32?M="J":-32>x&&x>=-40?M="H":-40>x&&x>=-48?M="G":-48>x&&x>=-56?M="F":-56>x&&x>=-64?M="E":-64>x&&x>=-72?M="D":-72>x&&x>=-80&&(M="C"),M)}}({lat:t[1],lon:t[0]}),a)}function bt(t){var a=St(Pt(t.toUpperCase()));return a.lat&&a.lon?[a.lon,a.lat]:[(a.left+a.right)/2,(a.top+a.bottom)/2]}function vt(t){return t*(Math.PI/180)}function Nt(t){return t/Math.PI*180}function St(t){var a=t.northing,s=t.easting,i=t.zoneLetter,n=t.zoneNumber;if(n<0||n>60)return null;var e,o,h,l,_,r,k,c,u,f=.9996,x=6378137,M=.00669438,y=(1-Math.sqrt(.99330562))/(1+Math.sqrt(.99330562)),g=s-5e5,p=a;i<"N"&&(p-=1e7),k=6*(n-1)-180+3,e=.006739496752268451,u=(c=p/f/6367449.145945056)+(3*y/2-27*y*y*y/32)*Math.sin(2*c)+(21*y*y/16-55*y*y*y*y/32)*Math.sin(4*c)+151*y*y*y/96*Math.sin(6*c),o=x/Math.sqrt(1-M*Math.sin(u)*Math.sin(u)),h=Math.tan(u)*Math.tan(u),l=e*Math.cos(u)*Math.cos(u),_=.99330562*x/Math.pow(1-M*Math.sin(u)*Math.sin(u),1.5),r=g/(o*f);var d=u-o*Math.tan(u)/_*(r*r/2-(5+3*h+10*l-4*l*l-9*e)*r*r*r*r/24+(61+90*h+298*l+45*h*h-1.6983531815716497-3*l*l)*r*r*r*r*r*r/720);d=Nt(d);var m,w=(r-(1+2*h+l)*r*r*r/6+(5-2*l+28*h-3*l*l+8*e+24*h*h)*r*r*r*r*r/120)/Math.cos(u);if(w=k+Nt(w),t.accuracy){var b=St({northing:t.northing+t.accuracy,easting:t.easting+t.accuracy,zoneLetter:t.zoneLetter,zoneNumber:t.zoneNumber});m={top:b.lat,right:b.lon,bottom:d,left:w}}else m={lat:d,lon:w};return m}function Ct(t){var a=t%6;return 0===a&&(a=6),a}function Pt(t){if(t&&0===t.length)throw"MGRSPoint coverting from nothing";for(var a,s=t.length,i=null,n="",e=0;!/[A-Z]/.test(a=t.charAt(e));){if(e>=2)throw"MGRSPoint bad conversion from: "+t;n+=a,e++}var o=parseInt(n,10);if(0===e||e+3>s)throw"MGRSPoint bad conversion from: "+t;var h=t.charAt(e++);if(h<="A"||"B"===h||"Y"===h||h>="Z"||"I"===h||"O"===h)throw"MGRSPoint zone letter "+h+" not handled: "+t;i=t.substring(e,e+=2);for(var l=Ct(o),_=function(t,a){for(var s=Mt.charCodeAt(a-1),i=1e5,n=!1;s!==t.charCodeAt(0);){if(++s===pt&&s++,s===dt&&s++,s>90){if(n)throw"Bad character: "+t;s=gt,n=!0}i+=1e5}return i}(i.charAt(0),l),r=function(t,a){if(t>"V")throw"MGRSPoint given invalid Northing "+t;for(var s=yt.charCodeAt(a-1),i=0,n=!1;s!==t.charCodeAt(0);){if(++s===pt&&s++,s===dt&&s++,s>86){if(n)throw"Bad character: "+t;s=gt,n=!0}i+=1e5}return i}(i.charAt(1),l);r<Et(h);)r+=2e6;var k=s-e;if(k%2!=0)throw"MGRSPoint has to have an even number \nof digits after the zone letter and two 100km letters - front \nhalf for easting meters, second half for \nnorthing meters"+t;var c,u,f,x=k/2,M=0,y=0;return x>0&&(c=1e5/Math.pow(10,x),u=t.substring(e,e+x),M=parseFloat(u)*c,f=t.substring(e+x),y=parseFloat(f)*c),{easting:M+_,northing:y+r,zoneLetter:h,zoneNumber:o,accuracy:c}}function Et(t){var a;switch(t){case"C":a=11e5;break;case"D":a=2e6;break;case"E":a=28e5;break;case"F":a=37e5;break;case"G":a=46e5;break;case"H":a=55e5;break;case"J":a=64e5;break;case"K":a=73e5;break;case"L":a=82e5;break;case"M":a=91e5;break;case"N":a=0;break;case"P":a=8e5;break;case"Q":a=17e5;break;case"R":a=26e5;break;case"S":a=35e5;break;case"T":a=44e5;break;case"U":a=53e5;break;case"V":a=62e5;break;case"W":a=7e6;break;case"X":a=79e5;break;default:a=-1}if(a>=0)return a;throw"Invalid zone letter: "+t}function At(t,a,s){if(!(this instanceof At))return new At(t,a,s);if(Array.isArray(t))this.x=t[0],this.y=t[1],this.z=t[2]||0;else if("object"==typeof t)this.x=t.x,this.y=t.y,this.z=t.z||0;else if("string"==typeof t&&void 0===a){var i=t.split(",");this.x=parseFloat(i[0],10),this.y=parseFloat(i[1],10),this.z=parseFloat(i[2],10)||0}else this.x=t,this.y=a,this.z=s||0;console.warn("proj4.Point will be removed in version 3, use proj4.toPoint")}At.fromMGRS=function(t){return new At(bt(t))},At.prototype.toMGRS=function(t){return wt([this.x,this.y],t)};const It=At;var Ot=.046875,jt=.01953125,zt=.01068115234375;function qt(t){var a=[];a[0]=1-t*(.25+t*(Ot+t*(jt+t*zt))),a[1]=t*(.75-t*(Ot+t*(jt+t*zt)));var s=t*t;return a[2]=s*(.46875-t*(.013020833333333334+.007120768229166667*t)),s*=t,a[3]=s*(.3645833333333333-.005696614583333333*t),a[4]=s*t*.3076171875,a}function Gt(t,a,s,i){return s*=a,a*=a,i[0]*t-s*(i[1]+a*(i[2]+a*(i[3]+a*i[4])))}function Lt(t,a,s){for(var i=1/(1-a),n=t,e=20;e;--e){var o=Math.sin(n),l=1-a*o*o;if(n-=l=(Gt(n,o,Math.cos(n),s)-t)*(l*Math.sqrt(l))*i,Math.abs(l)<h)return n}return n}const Rt={init:function(){this.x0=void 0!==this.x0?this.x0:0,this.y0=void 0!==this.y0?this.y0:0,this.long0=void 0!==this.long0?this.long0:0,this.lat0=void 0!==this.lat0?this.lat0:0,this.es&&(this.en=qt(this.es),this.ml0=Gt(this.lat0,Math.sin(this.lat0),Math.cos(this.lat0),this.en))},forward:function(t){var a,s,i,n=t.x,e=t.y,o=q(n-this.long0),l=Math.sin(e),_=Math.cos(e);if(this.es){var r=_*o,k=Math.pow(r,2),c=this.ep2*Math.pow(_,2),u=Math.pow(c,2),f=Math.abs(_)>h?Math.tan(e):0,x=Math.pow(f,2),M=Math.pow(x,2);a=1-this.es*Math.pow(l,2),r/=Math.sqrt(a);var y=Gt(e,l,_,this.en);s=this.a*(this.k0*r*(1+k/6*(1-x+c+k/20*(5-18*x+M+14*c-58*x*c+k/42*(61+179*M-M*x-479*x)))))+this.x0,i=this.a*(this.k0*(y-this.ml0+l*o*r/2*(1+k/12*(5-x+9*c+4*u+k/30*(61+M-58*x+270*c-330*x*c+k/56*(1385+543*M-M*x-3111*x))))))+this.y0}else{var g=_*Math.sin(o);if(Math.abs(Math.abs(g)-1)<h)return 93;if(s=.5*this.a*this.k0*Math.log((1+g)/(1-g))+this.x0,i=_*Math.cos(o)/Math.sqrt(1-Math.pow(g,2)),(g=Math.abs(i))>=1){if(g-1>h)return 93;i=0}else i=Math.acos(i);e<0&&(i=-i),i=this.a*this.k0*(i-this.lat0)+this.y0}return t.x=s,t.y=i,t},inverse:function(t){var a,s,i,n,e=(t.x-this.x0)*(1/this.a),l=(t.y-this.y0)*(1/this.a);if(this.es)if(s=Lt(a=this.ml0+l/this.k0,this.es,this.en),Math.abs(s)<o){var _=Math.sin(s),r=Math.cos(s),k=Math.abs(r)>h?Math.tan(s):0,c=this.ep2*Math.pow(r,2),u=Math.pow(c,2),f=Math.pow(k,2),x=Math.pow(f,2);a=1-this.es*Math.pow(_,2);var M=e*Math.sqrt(a)/this.k0,y=Math.pow(M,2);i=s-(a*=k)*y/(1-this.es)*.5*(1-y/12*(5+3*f-9*c*f+c-4*u-y/30*(61+90*f-252*c*f+45*x+46*c-y/56*(1385+3633*f+4095*x+1574*x*f)))),n=q(this.long0+M*(1-y/6*(1+2*f+c-y/20*(5+28*f+24*x+8*c*f+6*c-y/42*(61+662*f+1320*x+720*x*f))))/r)}else i=o*z(l),n=0;else{var g=Math.exp(e/this.k0)