function VectorTile(e,t){this.layers=e.readFields(readTile,{},t)}function readTile(e,t,r){if(3===e){var a=new VectorTileLayer(r,r.readVarint()+r.pos);a.length&&(t[a.name]=a)}}function VectorTileLayer(e,t){this.version=1,this.name=null,this.extent=4096,this.length=0,this._pbf=e,this._keys=[],this._values=[],this._features=[],e.readFields(readLayer,this,t),this.length=this._features.length}function readLayer(e,t,r){15===e?t.version=r.readVarint():1===e?t.name=r.readString():5===e?t.extent=r.readVarint():2===e?t._features.push(r.pos):3===e?t._keys.push(r.readString()):4===e&&t._values.push(readValueMessage(r))}function readValueMessage(e){for(var t=null,r=e.readVarint()+e.pos;e.pos<r;){var a=e.readVarint()>>3;t=1===a?e.readString():2===a?e.readFloat():3===a?e.readDouble():4===a?e.readVarint64():5===a?e.readVarint():6===a?e.readSVarint():7===a?e.readBoolean():null}return t}function VectorTileFeature(e,t,r,a,i){this.properties={},this.extent=r,this.type=0,this._pbf=e,this._geometry=-1,this._keys=a,this._values=i,e.readFields(readFeature,this,t)}function readFeature(e,t,r){1==e?t.id=r.readVarint():2==e?readTag(r,t):3==e?t.type=r.readVarint():4==e&&(t._geometry=r.pos)}function readTag(e,t){for(var r=e.readVarint()+e.pos;e.pos<r;){var a=t._keys[e.readVarint()],i=t._values[e.readVarint()];t.properties[a]=i}}function classifyRings(e){var t=e.length;if(t<=1)return[e];for(var r,a,i=[],n=0;n<t;n++){var s=signedArea(e[n]);0!==s&&(void 0===a&&(a=s<0),a===s<0?(r&&i.push(r),r=[e[n]]):r.push(e[n]))}return r&&i.push(r),i}function signedArea(e){for(var t,r,a=0,i=0,n=e.length,s=n-1;i<n;s=i++)t=e[i],a+=((r=e[s]).x-t.x)*(t.y+r.y);return a}VectorTileLayer.prototype.feature=function(e){if(e<0||e>=this._features.length)throw new Error("feature index out of bounds");this._pbf.pos=this._features[e];var t=this._pbf.readVarint()+this._pbf.pos;return new VectorTileFeature(this._pbf,t,this.extent,this._keys,this._values)},VectorTileFeature.types=["Unknown","Point","LineString","Polygon"],VectorTileFeature.prototype.loadGeometry=function(){var e=this._pbf;e.pos=this._geometry;for(var t,r=e.readVarint()+e.pos,a=1,i=0,n=0,s=0,o=[];e.pos<r;){if(i<=0){var h=e.readVarint();a=7&h,i=h>>3}if(i--,1===a||2===a)n+=e.readSVarint(),s+=e.readSVarint(),1===a&&(t&&o.push(t),t=[]),t.push(new Point(n,s));else{if(7!==a)throw new Error("unknown command "+a);t&&t.push(t[0].clone())}}return t&&o.push(t),o},VectorTileFeature.prototype.bbox=function(){var e=this._pbf;e.pos=this._geometry;for(var t=e.readVarint()+e.pos,r=1,a=0,i=0,n=0,s=1/0,o=-1/0,h=1/0,u=-1/0;e.pos<t;){if(a<=0){var p=e.readVarint();r=7&p,a=p>>3}if(a--,1===r||2===r)(i+=e.readSVarint())<s&&(s=i),i>o&&(o=i),(n+=e.readSVarint())<h&&(h=n),n>u&&(u=n);else if(7!==r)throw new Error("unknown command "+r)}return[s,h,o,u]},VectorTileFeature.prototype.toGeoJSON=function(e,t,r){var a,i,n=this.extent*Math.pow(2,r),s=this.extent*e,o=this.extent*t,h=this.loadGeometry(),u=VectorTileFeature.types[this.type];function p(e){for(var t=0;t<e.length;t++){var r=e[t],a=180-360*(r.y+o)/n;e[t]=[360*(r.x+s)/n-180,360/Math.PI*Math.atan(Math.exp(a*Math.PI/180))-90]}}switch(this.type){case 1:var d=[];for(a=0;a<h.length;a++)d[a]=h[a][0];p(h=d);break;case 2:for(a=0;a<h.length;a++)p(h[a]);break;case 3:for(h=classifyRings(h),a=0;a<h.length;a++)for(i=0;i<h[a].length;i++)p(h[a][i])}1===h.length?h=h[0]:u="Multi"+u;var l={type:"Feature",geometry:{type:u,coordinates:h},properties:this.properties};return"id"in this&&(l.id=this.id),l};