CN101719154B - 一种基于栅格结构的空间索引建立方法和系统 - Google Patents
一种基于栅格结构的空间索引建立方法和系统 Download PDFInfo
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//读取.shp文件ReadShp(){利用GDAL库获取数据源OGRDataSource *poDS |
//获取该数据源的图层poLayer及该图层的外包EnvpoLayer=poDS->GetLayer(0)poLayer->GetExtent(&Env,true)根据外包计算世界坐标向屏幕坐标转换公式//循环读取该图层的要素OGRFeature*poFeatureWhile(poFeature=poLayer->GetNextFeature()!=NULL){定义OGR几何体OGRGeometry*geom获取要素索引信息FeatureId//点数据if(geom->getGeometryType()==wkbPoint){//通过geom定义OGRPoint*poPoint=(OGRPoint*)geom;坐标系转换利用AGG引擎绘制点数据}//线数据else if(geom->getGeometryType()==wkbLineString){//定义线集合OGRLineString*poLine=(OGRLineString*)geom循环取遍该线上所有点存入数组坐标系转换利用AGG引擎绘制线数据}//面数据else if(geom->getGeometryType()==wkbPolygon){//定义面OGRPolygon |
*poPolygon=(OGRPolygon*)geom;获取该面得内环、外环坐标系转换利用AGG引擎填充外环内的面数据利用AGG引擎填充内环外的面数据}//Multi点else if(geom->getGeometryType()==wkbMultiPoint){//获取OGRGeometryCollection*PointCollection=(OGRGeometryCollection*)geom;按照处理点数据的方式循环处理该集合}//Multi线elseif(geom->getGeometryType()==wkbMultiLineString){//获取OGRGeometryCollection*PointCollection=(OGRGeometryCollection*)geom;按照处理线数据的方式循环处理该集合}//Multi面else if(geom->getGeometryType()==wkbMultiPolygon){//获取OGRGeometryCollection*PointCollection=(OGRGeometryCollection*)geom;按照处理面数据的方式循环处理该集合}}} |
void convert(int id,int&r,int&g,int&b){定义颜色数组如果要素ID不为0将该十进制数转换为二进制数存入数组中 |
for(循环数组的低8位){计算B分量;}for(循环数组的中间8位){计算G分量;}for(循环数组的高8位){计算R分量;}} |
编号 | 名称 | 几何类型 | 大小(MB) | 要素数目 | 对应图示 |
D1 | BOUND_poly.shp | MultiPolygon | 17.3 | 3407 | 图18(a) |
D2 | CS_99_03c.shp | MultiPolygon | 1.48 | 123 | 图18(b) |
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CN101908062A (zh) * | 2010-07-02 | 2010-12-08 | 中国科学院计算技术研究所 | Gis空间谓词判断方法及其系统 |
CN102253970B (zh) * | 2011-06-09 | 2013-11-13 | 北京新媒传信科技有限公司 | 一种图像处理方法 |
CN102591622B (zh) * | 2011-12-20 | 2014-04-09 | 南京大学 | 基于相似变换模型的栅格数据坐标转换并行方法 |
CN102542035B (zh) * | 2011-12-20 | 2014-04-16 | 南京大学 | 基于扫描线法的多边形栅格化并行转换方法 |
CN102609329A (zh) * | 2011-12-30 | 2012-07-25 | 北京地拓科技发展有限公司 | 一种读写远程服务器上栅格数据的方法及存储管理系统 |
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CN105184837B (zh) * | 2015-08-31 | 2018-02-02 | 武汉云空间地理信息技术有限公司 | 一种矢量多边形栅格化的方法及系统 |
EP3437072B1 (en) * | 2016-03-28 | 2020-10-14 | Sony Corporation | System and method for rendering points without gaps |
CN105911988A (zh) * | 2016-04-26 | 2016-08-31 | 湖南拓视觉信息技术有限公司 | 一种自动制图装置及方法 |
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CN106611060A (zh) * | 2016-12-29 | 2017-05-03 | 苏碧云 | 一种用于gis的数据处理方法 |
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CN106960029B (zh) * | 2017-03-21 | 2020-07-28 | 刘博宇 | 一种提取跨图幅地理范围分幅栅格数据的方法 |
CN108090150B (zh) * | 2017-12-11 | 2020-12-15 | 厦门亿力吉奥信息科技有限公司 | Gis空间对象存储方法及其系统 |
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CN108664306A (zh) * | 2018-05-08 | 2018-10-16 | 广东亿迅科技有限公司 | 基于canvas与R树空间的浏览器矢量图形渲染方法及装置 |
CN110069556B (zh) * | 2019-03-14 | 2021-11-12 | 武汉众智鸿图科技有限公司 | 一种dwg格式矢量地图服务发布方法及装置 |
CN110473273B (zh) * | 2019-07-24 | 2023-05-09 | 广州视源电子科技股份有限公司 | 矢量图形的绘制方法、装置、存储介质及终端 |
CN110969567B (zh) * | 2019-11-18 | 2023-09-19 | 中国航空工业集团公司西安航空计算技术研究所 | 一种gpu线图元光栅化平移坐标系扫描方法 |
CN111091487B (zh) * | 2019-11-18 | 2023-10-20 | 中国航空工业集团公司西安航空计算技术研究所 | 面向gpu硬件线图元光栅化扫描算法的tlm微结构 |
CN115794938B (zh) * | 2023-02-06 | 2023-04-28 | 中国人民解放军国防科技大学 | 地理矢量线数据的可视化方法、装置和计算机设备 |
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CN101211416A (zh) * | 2006-12-26 | 2008-07-02 | 北京北大方正电子有限公司 | 矢量图形光栅化过程中的边界生成方法及系统、制造方法 |
CN101388043A (zh) * | 2008-09-26 | 2009-03-18 | 北京航空航天大学 | 一种基于小块图片的ogc高性能遥感图像地图服务方法 |
CN101582077A (zh) * | 2009-06-24 | 2009-11-18 | 上海可鲁系统软件有限公司 | 一种二维矢量图形的空间索引方法及装置 |
CN101593354A (zh) * | 2009-07-01 | 2009-12-02 | 上海可鲁系统软件有限公司 | 一种二维矢量图形的重绘方法及装置 |
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CN101211416A (zh) * | 2006-12-26 | 2008-07-02 | 北京北大方正电子有限公司 | 矢量图形光栅化过程中的边界生成方法及系统、制造方法 |
CN101388043A (zh) * | 2008-09-26 | 2009-03-18 | 北京航空航天大学 | 一种基于小块图片的ogc高性能遥感图像地图服务方法 |
CN101582077A (zh) * | 2009-06-24 | 2009-11-18 | 上海可鲁系统软件有限公司 | 一种二维矢量图形的空间索引方法及装置 |
CN101593354A (zh) * | 2009-07-01 | 2009-12-02 | 上海可鲁系统软件有限公司 | 一种二维矢量图形的重绘方法及装置 |
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