sdw/transform.html

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    <title>Transform spatial data</title>
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      <h1>Transform spatial data</h1>
      <p>Spatial data sometimes needs to be transformed in order to make it fit for use on the Web. In most cases, this comes down to partitioning large datasets into parts convenient to handle by humans and browsers. </p>
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      <section class="featureset well-deployed">
        <h2>Well-deployed technologies</h2>
        <!-- partitioning data for the web-->
        <p data-feature="Data cubes">To partition RDF data for the Web, the <a data-featureid="vocab-data-cube">RDF Data Cube Vocabulary</a> is available. An extension for spatial and temporal data exists, but is still exploratory work.</p>
        <p data-feature="3D tiling">To visualize heterogeneous 3D geospatial data on the Web in an efficient way, <a data-featureid="i3s">Indexed 3D Scene Layers</a> (i3S) can be used. In i3S, 3D data can be partitioned into arbitrarily large containers called "Scene layers". Each layer has its own behavior and properties. i3S is based on REST, JSON and other Web standards.</p>
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      <section class="featureset in-progress">
        <h2>Specifications in progress</h2>
        <!-- partitioning data for the web-->
        <p data-feature="3D tiling">For partitioning and streaming massive heterogeneous 3-dimensional geospatial datasets, <a data-featureid="3dtiles">Cesium 3DTiles</a> is available. It is currently in the process of becoming an OGC community standard.</p>
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      <section class="featureset exploratory-work">
        <h2>Exploratory work</h2>
        <!-- partitioning data for the web-->
        <div data-feature="Geospatial data partitioning">
          <p><em>Vector tiling</em> is a name for solutions where geographic data is packaged into pre-defined roughly-square shaped tiles for transfer over the web. There are several existing solutions, none yet standardized, described in the <a data-featureid="vector-tiling-er">OGC Testbed-13:  Vector Tiles Engineering Report</a>.</p>
          <!--<p>To partition raster data, .. [description and ref for 'raster tiling' tbd].</p>-->
          <p>To partition RDF data for the web using spatial and/or temporal data elements, <a data-featureid="qb4st">QB4ST: RDF Data Cube extensions for spatio-temporal components</a> is available. The Note <a data-featureid="eo-qb">Publishing and Using Earth Observation Data with the RDF Data Cube and the Discrete Global Grid System</a> offers guidance on using RDF Data Cubes on geospatial data.</p>
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        <h2>Features not covered by ongoing work</h2>
        <!-- many of these are OGC standards we consider not 'webby' -->
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          <dt data-feature="Web processing of geospatial data"><a data-featureid="wps">Web Processing Service (WPS)</a></dt>
          <dd>An interface standard which provides rules for standardizing inputs and outputs (requests and responses) for invoking spatial processing services, such as polygon overlay, as a Web service.</dd>
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