@arcgis/core/smartMapping/heuristics/scaleRange.js

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

/*
All material copyright ESRI, All Rights Reserved, unless otherwise specified.
See https://js.arcgis.com/4.33/esri/copyright.txt for details.
*/
import e from"../../core/Error.js";import{getScaleForResolution as a}from"../../geometry/support/scaleUtils.js";import t from"../statistics/spatialStatistics.js";import{verifyBinningParams as n}from"../support/binningUtils.js";import{binningCapableLayerTypes as i,featureCapableLayerTypes as s,createLayerAdapter as r,getLayerTypeLabels as o}from"../support/adapters/support/layerUtils.js";const l=500,c=1e8,p=1280,f=12,m=30,u=15;async function g(a){const{view:t,sampleSize:c}=a;if(!a||!a.layer)throw new e("scale-range:missing-parameters","'layer' parameter is required");if(a.snapToLOD&&!t)throw new e("scale-range:missing-parameters","'view' parameter is required when 'snapToLOD' is true");a.forBinning&&n(a,"scale-range");const{layer:p,...f}=a,m=a.forBinning?i:s,u=r(p,m,a.forBinning);if(!u)throw new e("scale-range:invalid-parameters","'layer' must be one of these types: "+o(m).join(", "));const g={layerAdapter:u,...f};g.sampleSize=c||l,await(t?.when());const y=null!=g.signal?{signal:g.signal}:null;return await u.load(y),g}function y(e,a){const t=f,n=p/4,i=m,s=p/4,r=u,o=p/2;let l=0,c=0,g=0,y=0;switch(e){case"point":case"multipoint":{const e=a;l=e.avgMinDistance??0,c=t,g=e.minDistance??0,y=n;break}case"polyline":{const e=a;l=e.avgLength??0,c=i,g=e.minLength??0,y=s;break}case"polygon":{const e=a;l=e.avgSize??0,c=r,g=e.minSize??0,y=o;break}}return{resolutionForMinScale:l>0?l/c:null,resolutionForMaxScale:g>0?g/y:null}}function w(e,t,n){const i=y(e.geometryType,t),s=n?.spatialReference||e.layer.spatialReference;return{minScale:a(i.resolutionForMinScale??0,s),maxScale:a(i.resolutionForMaxScale??0,s)}}function S(e,a,t=!0){if(e.constraints&&"effectiveLODs"in e.constraints){const n=e.constraints.effectiveLODs,i=t?n:n.slice().reverse();let s=null;for(const e of i)if(!(t?e.scale>a:e.scale<a)){s=e;break}return s}}function h(a,t,n,i){const{view:s,snapToLOD:r,layerAdapter:o}=a;if(r&&s){const e=S(s,t),a=S(s,n,!1);t=e?e.scale:t,n=a?a.scale:n}if(t<n)throw new e("scale-range:invalid","calculated minScale is less than maxScale.");return n>t/2&&(n=Math.floor(n/2)),t>c&&(t=0),"polygon"!==o.geometryType&&(n=0),{minScale:Math.ceil(t),maxScale:Math.floor(n),spatialStatistics:i}}async function v(a){const n=await g(a),{view:i,sampleSize:s,layerAdapter:r,signal:o,filter:l}=n,c=await r.getSampleFeatures({view:i,sampleSize:s,returnGeometry:!0,filter:l,signal:o},"json");if(!c?.length)throw new e("scale-range:insufficient-info","No features are available to calculate statistics");const p=await t({features:c,geometryType:r.geometryType}),{minScale:f,maxScale:m}=w(r,p,i);return h(n,f,m,p)}export{v as default};