flatgeobuf
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A performant binary encoding for geographic data
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<html class="default" lang="en" data-base="../"><head><meta charset="utf-8"/><meta http-equiv="x-ua-compatible" content="IE=edge"/><title>HeaderMeta | flatgeobuf</title><meta name="description" content="Documentation for flatgeobuf"/><meta name="viewport" content="width=device-width, initial-scale=1"/><link rel="stylesheet" href="../assets/style.css"/><link rel="stylesheet" href="../assets/highlight.css"/><script defer src="../assets/main.js"></script><script async src="../assets/icons.js" id="tsd-icons-script"></script><script async src="../assets/search.js" id="tsd-search-script"></script><script async src="../assets/navigation.js" id="tsd-nav-script"></script><script async src="../assets/hierarchy.js" id="tsd-hierarchy-script"></script></head><body><script>document.documentElement.dataset.theme = localStorage.getItem("tsd-theme") || "os";document.body.style.display="none";setTimeout(() => window.app?app.showPage():document.body.style.removeProperty("display"),500)</script><header class="tsd-page-toolbar"><div class="tsd-toolbar-contents container"><a href="../index.html" class="title">flatgeobuf</a><div id="tsd-toolbar-links"></div><button id="tsd-search-trigger" class="tsd-widget" aria-label="Search"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-search"></use></svg></button><dialog id="tsd-search" aria-label="Search"><input role="combobox" id="tsd-search-input" aria-controls="tsd-search-results" aria-autocomplete="list" aria-expanded="true" autocapitalize="off" autocomplete="off" placeholder="Search the docs" maxLength="100"/><ul role="listbox" id="tsd-search-results"></ul><div id="tsd-search-status" aria-live="polite" aria-atomic="true"><div>Preparing search index...</div></div></dialog><a href="#" class="tsd-widget menu" id="tsd-toolbar-menu-trigger" data-toggle="menu" aria-label="Menu"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-menu"></use></svg></a></div></header><div class="container container-main"><div class="col-content"><div class="tsd-page-title"><ul class="tsd-breadcrumb" aria-label="Breadcrumb"><li><a href="" aria-current="page">HeaderMeta</a></li></ul><h1>Interface HeaderMeta</h1></div><div class="tsd-signature"><span class="tsd-signature-keyword">interface</span> <span class="tsd-kind-interface">HeaderMeta</span> <span class="tsd-signature-symbol">{</span><br/> <a class="tsd-kind-property" href="#columns">columns</a><span class="tsd-signature-symbol">:</span> <a href="ColumnMeta.html" class="tsd-signature-type tsd-kind-interface">ColumnMeta</a><span class="tsd-signature-symbol">[]</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#crs">crs</a><span class="tsd-signature-symbol">:</span> <a href="CrsMeta.html" class="tsd-signature-type tsd-kind-interface">CrsMeta</a> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#description">description</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#envelope">envelope</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Float64Array</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">ArrayBufferLike</span><span class="tsd-signature-symbol">></span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#featurescount">featuresCount</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#geometrytype">geometryType</a><span class="tsd-signature-symbol">:</span> <a href="../enums/generic.GeometryType.html" class="tsd-signature-type tsd-kind-enum">GeometryType</a><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#indexnodesize">indexNodeSize</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#metadata">metadata</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="#title">title</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span><span class="tsd-signature-symbol">;</span><br/><span class="tsd-signature-symbol">}</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L8">src/ts/header-meta.ts:8</a></li></ul></aside><section class="tsd-panel-group tsd-index-group"><section class="tsd-panel tsd-index-panel"><details class="tsd-index-content tsd-accordion" open><summary class="tsd-accordion-summary tsd-index-summary"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg><h5 class="tsd-index-heading uppercase">Index</h5></summary><div class="tsd-accordion-details"><section class="tsd-index-section"><h3 class="tsd-index-heading">Properties</h3><div class="tsd-index-list"><a href="#columns" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>columns</span></a>
<a href="#crs" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>crs</span></a>
<a href="#description" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>description</span></a>
<a href="#envelope" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>envelope</span></a>
<a href="#featurescount" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>features<wbr/>Count</span></a>
<a href="#geometrytype" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>geometry<wbr/>Type</span></a>
<a href="#indexnodesize" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>index<wbr/>Node<wbr/>Size</span></a>
<a href="#metadata" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>metadata</span></a>
<a href="#title" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>title</span></a>
</div></section></div></details></section></section><details class="tsd-panel-group tsd-member-group tsd-accordion" open><summary class="tsd-accordion-summary" data-key="section-Properties"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg><h2>Properties</h2></summary><section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="columns"><span>columns</span><a href="#columns" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">columns</span><span class="tsd-signature-symbol">:</span> <a href="ColumnMeta.html" class="tsd-signature-type tsd-kind-interface">ColumnMeta</a><span class="tsd-signature-symbol">[]</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L10">src/ts/header-meta.ts:10</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="crs"><span>crs</span><a href="#crs" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">crs</span><span class="tsd-signature-symbol">:</span> <a href="CrsMeta.html" class="tsd-signature-type tsd-kind-interface">CrsMeta</a> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L14">src/ts/header-meta.ts:14</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="description"><span>description</span><a href="#description" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">description</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L16">src/ts/header-meta.ts:16</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="envelope"><span>envelope</span><a href="#envelope" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">envelope</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Float64Array</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">ArrayBufferLike</span><span class="tsd-signature-symbol">></span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L11">src/ts/header-meta.ts:11</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="featurescount"><span>features<wbr/>Count</span><a href="#featurescount" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">featuresCount</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L12">src/ts/header-meta.ts:12</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="geometrytype"><span>geometry<wbr/>Type</span><a href="#geometrytype" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">geometryType</span><span class="tsd-signature-symbol">:</span> <a href="../enums/generic.GeometryType.html" class="tsd-signature-type tsd-kind-enum">GeometryType</a></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L9">src/ts/header-meta.ts:9</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="indexnodesize"><span>index<wbr/>Node<wbr/>Size</span><a href="#indexnodesize" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">indexNodeSize</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L13">src/ts/header-meta.ts:13</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="metadata"><span>metadata</span><a href="#metadata" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">metadata</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L17">src/ts/header-meta.ts:17</a></li></ul></aside></section><section class="tsd-panel tsd-member"><h3 class="tsd-anchor-link" id="title"><span>title</span><a href="#title" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">title</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">null</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/bjornharrtell/flatgeobuf/blob/3df4db1a9551821f66a1d789bb8632c8076926be/src/ts/header-meta.ts#L15">src/ts/header-meta.ts:15</a></li></ul></aside></section></section></details></div><div class="col-sidebar"><div class="page-menu"><div class="tsd-navigation settings"><details class="tsd-accordion"><summary class="tsd-accordion-summary"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use 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aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>description</span></a><a href="#envelope"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>envelope</span></a><a href="#featurescount"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>features<wbr/>Count</span></a><a href="#geometrytype"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>geometry<wbr/>Type</span></a><a href="#indexnodesize"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>index<wbr/>Node<wbr/>Size</span></a><a href="#metadata"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>metadata</span></a><a 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