通过分析气象数据的特点和RIA(Rich Internet Application)技术的优势,为实现气象影像数据的高效发布,对网络地图发布的关键技术进行了详细的研究。主要包括缓存切片的分层分块规则建立,影像数据瓦片缓存目录构建,动态切片生成技术,Fle...通过分析气象数据的特点和RIA(Rich Internet Application)技术的优势,为实现气象影像数据的高效发布,对网络地图发布的关键技术进行了详细的研究。主要包括缓存切片的分层分块规则建立,影像数据瓦片缓存目录构建,动态切片生成技术,Flex客户端地图展示技术。结果表明:与传统基于Web的地图发布技术相比,RIA技术具有界面元素丰富,交互响应快,大数据量显示效率高的优势。此外,还能够在改变地图缩放级别时,实现地图数据的快速加载和无缝拼接,这为后续气象GIS平台的开发以及高效运行奠定了基础。展开更多
The Institute for Creative Technologies (ICT) has pursued the creation of One World Terrain (OWT), which aims to provide a set of 3D global terrain capabilities and services that can replicate the coverage and complex...The Institute for Creative Technologies (ICT) has pursued the creation of One World Terrain (OWT), which aims to provide a set of 3D global terrain capabilities and services that can replicate the coverage and complexities of the operational environment. Research was conducted in support of One World Terrain through development of best practices for the delivery of a raster mosaic via cloud hosting service, created using OptimizeRasters Geoprocoessing Toolbox and the Mosaic Dataset Configuration Script. Though ultimately successful in developing the raster mosaic and hosting it online;JPEG compression lossiness was a key issue with the larger Rose Bowl dataset. Additionally, hosting the imagery via ArcGIS Online was found to increase the compressed file size;making it comparable to the original file size of the data. Future testing should consider usage of an enterprise server to avoid this issue. MRF_LERC compression was identified as the ideal file configuration;and ArcGIS Online was identified as a poor enterprise hosting medium. We have also identified a variety of ways to improve the MDCS script in order to automate the whole process more efficiently.展开更多
文摘通过分析气象数据的特点和RIA(Rich Internet Application)技术的优势,为实现气象影像数据的高效发布,对网络地图发布的关键技术进行了详细的研究。主要包括缓存切片的分层分块规则建立,影像数据瓦片缓存目录构建,动态切片生成技术,Flex客户端地图展示技术。结果表明:与传统基于Web的地图发布技术相比,RIA技术具有界面元素丰富,交互响应快,大数据量显示效率高的优势。此外,还能够在改变地图缩放级别时,实现地图数据的快速加载和无缝拼接,这为后续气象GIS平台的开发以及高效运行奠定了基础。
文摘The Institute for Creative Technologies (ICT) has pursued the creation of One World Terrain (OWT), which aims to provide a set of 3D global terrain capabilities and services that can replicate the coverage and complexities of the operational environment. Research was conducted in support of One World Terrain through development of best practices for the delivery of a raster mosaic via cloud hosting service, created using OptimizeRasters Geoprocoessing Toolbox and the Mosaic Dataset Configuration Script. Though ultimately successful in developing the raster mosaic and hosting it online;JPEG compression lossiness was a key issue with the larger Rose Bowl dataset. Additionally, hosting the imagery via ArcGIS Online was found to increase the compressed file size;making it comparable to the original file size of the data. Future testing should consider usage of an enterprise server to avoid this issue. MRF_LERC compression was identified as the ideal file configuration;and ArcGIS Online was identified as a poor enterprise hosting medium. We have also identified a variety of ways to improve the MDCS script in order to automate the whole process more efficiently.
