With the progress and development of science, the synchronous satellite as the high-tech product is taken something more and more seriously by all countries. Converting gray value matrix into geographic coordinates be...With the progress and development of science, the synchronous satellite as the high-tech product is taken something more and more seriously by all countries. Converting gray value matrix into geographic coordinates becomes more and more important. This paper establishes the models for interconverting row and column of gray value matrix which detected by the infrared detectors on synchronous satellites and geographic coordinates based on the related theorems and properties of space analytic geometry. We draw satellite cloud image with the data of gray matrix in MATLAB, convert coastline’s latitude and longitude coordinates into row and column coordinates of a gray matrix according via these models when the sub-satellite point’s row and column coordinates and geographic coordinates are given, then add coast-lines to the original satellite cloud image with the transformation data. We find that coast-lines completely match with the bump characteristics of satellite cloud image, and that verify the correctness of the models.展开更多
由于城市空间规划数据获取难度大,且需要考虑环境、交通、社会等多方面因素的影响,规划难度较高。因此,本文设计基于地理空间信息系统的城市空间规划模型。该模型以支撑层作为模型运行支撑,门户层通过身份认证后,下达城市规划指令,数据...由于城市空间规划数据获取难度大,且需要考虑环境、交通、社会等多方面因素的影响,规划难度较高。因此,本文设计基于地理空间信息系统的城市空间规划模型。该模型以支撑层作为模型运行支撑,门户层通过身份认证后,下达城市规划指令,数据层通过奇异值分解方法融合城市空间数据,构建空间数据库,存储各类城市空间数据;应用层调用数据库中的各类城市空间数据,基于空间启发式布局优化方法,实现城市土地布局规划,采用VR-GIS可视化技术,构建城市空间的三维实景。测试结果表明:该模型的三维实景渲染效果良好,城市整体规划的连通性达到0.55以上,PC(probability of connectivity)指标的取值最高值为0.83,可依据用地类别需求完成土地布局规划。展开更多
文摘With the progress and development of science, the synchronous satellite as the high-tech product is taken something more and more seriously by all countries. Converting gray value matrix into geographic coordinates becomes more and more important. This paper establishes the models for interconverting row and column of gray value matrix which detected by the infrared detectors on synchronous satellites and geographic coordinates based on the related theorems and properties of space analytic geometry. We draw satellite cloud image with the data of gray matrix in MATLAB, convert coastline’s latitude and longitude coordinates into row and column coordinates of a gray matrix according via these models when the sub-satellite point’s row and column coordinates and geographic coordinates are given, then add coast-lines to the original satellite cloud image with the transformation data. We find that coast-lines completely match with the bump characteristics of satellite cloud image, and that verify the correctness of the models.
文摘由于城市空间规划数据获取难度大,且需要考虑环境、交通、社会等多方面因素的影响,规划难度较高。因此,本文设计基于地理空间信息系统的城市空间规划模型。该模型以支撑层作为模型运行支撑,门户层通过身份认证后,下达城市规划指令,数据层通过奇异值分解方法融合城市空间数据,构建空间数据库,存储各类城市空间数据;应用层调用数据库中的各类城市空间数据,基于空间启发式布局优化方法,实现城市土地布局规划,采用VR-GIS可视化技术,构建城市空间的三维实景。测试结果表明:该模型的三维实景渲染效果良好,城市整体规划的连通性达到0.55以上,PC(probability of connectivity)指标的取值最高值为0.83,可依据用地类别需求完成土地布局规划。
