API Reference | OSGeo FDO Provider for SDF |
00001 /*! \mainpage Introduction 00002 <div class="mainpage"> 00003 <!-- This is the index.html page that the user first sees. --> 00004 00005 <p>The Feature Data Objects (FDO) API provides access to data in a 00006 data store. A provider is a specific implementation of the FDO API 00007 that provides access to data in a particular data store. The FDO 00008 Provider for SDF provides FDO with access to an SDF-based data store. 00009 00010 <p>The Autodesk SDF file format is a standalone, file-based spatial database 00011 format that supports multiple features classes and properties in a single file, 00012 and provides spatial indexing, interoperability, and high performance for 00013 large data sets. 00014 </p> 00015 00016 <p>The SDF file format has the following characteristics: 00017 </p> 00018 <ul> 00019 <li>SDF files can be read on different platforms. 00020 <li>One schema in a single SDF file supports multiple feature classes. 00021 <li>The SDF file has its own spatial indexing. 00022 <li>SDF files can store geometric and non-geometric data with minimum overhead. 00023 <li>The SDF file format supports a single writer at any time, with multiple readers. 00024 </ul> 00025 00026 <p>An SDF schema can support the following: 00027 </p> 00028 <ul> 00029 <li>Auto ID generation 00030 <li>Exclusive value range constraints 00031 <li>Null value constraints 00032 <li>Spatial contexts 00033 <li>These geometry types: point, line string, polygon, multi-point, multi-line 00034 string, multi-polygon, curve string, curve polygon, multi-curve string, 00035 multi-curve polygon, linear ring, line string segment, circular arc segment, and ring. 00036 </ul> 00037 00038 <p> 00039 For more information, see <i>The Essential FDO</i> (FET_TheEssentialFDO.pdf) 00040 and the <i>FDO Developer's Guide</i> (FDG_FDODevGuide.pdf). 00041 </p> 00042 00043 <br> 00044 </div> 00045 */ 00046 00047 00048 00049
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